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haproxy/addons/promex/service-prometheus.c
Christopher Faulet d4eacb3683 MEDIUM: promex: Use the sedesc to report and detect end of processing 
Just like for other applets, we now use the SE descriptor instead of the
channel to report error and end-of-stream.
2023-04-05 08:57:06 +02:00

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/*
* Promex is a Prometheus exporter for HAProxy
*
* It is highly inspired by the official Prometheus exporter.
* See: https://github.com/prometheus/haproxy_exporter
*
* Copyright 2019 Christopher Faulet <cfaulet@haproxy.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <haproxy/action-t.h>
#include <haproxy/api.h>
#include <haproxy/applet.h>
#include <haproxy/backend.h>
#include <haproxy/cfgparse.h>
#include <haproxy/check.h>
#include <haproxy/frontend.h>
#include <haproxy/global.h>
#include <haproxy/http.h>
#include <haproxy/http_ana.h>
#include <haproxy/http_htx.h>
#include <haproxy/htx.h>
#include <haproxy/list.h>
#include <haproxy/listener.h>
#include <haproxy/log.h>
#include <haproxy/proxy.h>
#include <haproxy/sample.h>
#include <haproxy/sc_strm.h>
#include <haproxy/server.h>
#include <haproxy/stats.h>
#include <haproxy/stconn.h>
#include <haproxy/stream.h>
#include <haproxy/task.h>
#include <haproxy/tools.h>
#include <haproxy/version.h>
/* Prometheus exporter applet states (appctx->st0) */
enum {
PROMEX_ST_INIT = 0, /* initialized */
PROMEX_ST_HEAD, /* send headers before dump */
PROMEX_ST_DUMP, /* dumping stats */
PROMEX_ST_DONE, /* finished */
PROMEX_ST_END, /* treatment terminated */
};
/* Prometheus exporter dumper states (appctx->st1) */
enum {
PROMEX_DUMPER_INIT = 0, /* initialized */
PROMEX_DUMPER_GLOBAL, /* dump metrics of globals */
PROMEX_DUMPER_FRONT, /* dump metrics of frontend proxies */
PROMEX_DUMPER_BACK, /* dump metrics of backend proxies */
PROMEX_DUMPER_LI, /* dump metrics of listeners */
PROMEX_DUMPER_SRV, /* dump metrics of servers */
PROMEX_DUMPER_STICKTABLE, /* dump metrics of stick tables */
PROMEX_DUMPER_DONE, /* finished */
};
/* Prometheus exporter flags (ctx->flags) */
#define PROMEX_FL_METRIC_HDR 0x00000001
#define PROMEX_FL_INFO_METRIC 0x00000002
#define PROMEX_FL_FRONT_METRIC 0x00000004
#define PROMEX_FL_BACK_METRIC 0x00000008
#define PROMEX_FL_SRV_METRIC 0x00000010
#define PROMEX_FL_LI_METRIC 0x00000020
#define PROMEX_FL_STICKTABLE_METRIC 0x00000040
#define PROMEX_FL_SCOPE_GLOBAL 0x00000080
#define PROMEX_FL_SCOPE_FRONT 0x00000100
#define PROMEX_FL_SCOPE_BACK 0x00000200
#define PROMEX_FL_SCOPE_SERVER 0x00000400
#define PROMEX_FL_SCOPE_LI 0x00000800
#define PROMEX_FL_SCOPE_STICKTABLE 0x00001000
#define PROMEX_FL_NO_MAINT_SRV 0x00002000
#define PROMEX_FL_SCOPE_ALL (PROMEX_FL_SCOPE_GLOBAL | PROMEX_FL_SCOPE_FRONT | \
PROMEX_FL_SCOPE_LI | PROMEX_FL_SCOPE_BACK | \
PROMEX_FL_SCOPE_SERVER | PROMEX_FL_SCOPE_STICKTABLE)
/* the context of the applet */
struct promex_ctx {
struct proxy *px; /* current proxy */
struct stktable *st; /* current table */
struct listener *li; /* current listener */
struct server *sv; /* current server */
unsigned int flags; /* PROMEX_FL_* */
unsigned field_num; /* current field number (ST_F_* etc) */
int obj_state; /* current state among PROMEX_{FRONT|BACK|SRV|LI}_STATE_* */
};
/* Promtheus metric type (gauge or counter) */
enum promex_mt_type {
PROMEX_MT_GAUGE = 1,
PROMEX_MT_COUNTER = 2,
};
/* The max length for metrics name. It is a hard limit but it should be
* enough.
*/
#define PROMEX_MAX_NAME_LEN 128
/* The expected max length for a metric dump, including its header lines. It is
* just a soft limit to avoid extra work. We don't try to dump a metric if less
* than this size is available in the HTX.
*/
#define PROMEX_MAX_METRIC_LENGTH 512
/* The max number of labels per metric */
#define PROMEX_MAX_LABELS 8
/* Describe a prometheus metric */
struct promex_metric {
const struct ist n; /* The metric name */
enum promex_mt_type type; /* The metric type (gauge or counter) */
unsigned int flags; /* PROMEX_FL_* flags */
};
/* Describe a prometheus metric label. It is just a key/value pair */
struct promex_label {
struct ist name;
struct ist value;
};
/* Global metrics */
const struct promex_metric promex_global_metrics[INF_TOTAL_FIELDS] = {
//[INF_NAME] ignored
//[INF_VERSION], ignored
//[INF_RELEASE_DATE] ignored
[INF_NBTHREAD] = { .n = IST("nbthread"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_NBPROC] = { .n = IST("nbproc"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_PROCESS_NUM] = { .n = IST("relative_process_id"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
//[INF_PID] ignored
//[INF_UPTIME] ignored
[INF_UPTIME_SEC] = { .n = IST("uptime_seconds"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_START_TIME_SEC] = { .n = IST("start_time_seconds"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
//[INF_MEMMAX_MB] ignored
[INF_MEMMAX_BYTES] = { .n = IST("max_memory_bytes"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
//[INF_POOL_ALLOC_MB] ignored
[INF_POOL_ALLOC_BYTES] = { .n = IST("pool_allocated_bytes"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
//[INF_POOL_USED_MB] ignored
[INF_POOL_USED_BYTES] = { .n = IST("pool_used_bytes"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_POOL_FAILED] = { .n = IST("pool_failures_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_ULIMIT_N] = { .n = IST("max_fds"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAXSOCK] = { .n = IST("max_sockets"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAXCONN] = { .n = IST("max_connections"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_HARD_MAXCONN] = { .n = IST("hard_max_connections"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_CURR_CONN] = { .n = IST("current_connections"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_CUM_CONN] = { .n = IST("connections_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_CUM_REQ] = { .n = IST("requests_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAX_SSL_CONNS] = { .n = IST("max_ssl_connections"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_CURR_SSL_CONNS] = { .n = IST("current_ssl_connections"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_CUM_SSL_CONNS] = { .n = IST("ssl_connections_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAXPIPES] = { .n = IST("max_pipes"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_PIPES_USED] = { .n = IST("pipes_used_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_PIPES_FREE] = { .n = IST("pipes_free_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_CONN_RATE] = { .n = IST("current_connection_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_CONN_RATE_LIMIT] = { .n = IST("limit_connection_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAX_CONN_RATE] = { .n = IST("max_connection_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SESS_RATE] = { .n = IST("current_session_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SESS_RATE_LIMIT] = { .n = IST("limit_session_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAX_SESS_RATE] = { .n = IST("max_session_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_RATE] = { .n = IST("current_ssl_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_RATE_LIMIT] = { .n = IST("limit_ssl_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAX_SSL_RATE] = { .n = IST("max_ssl_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_FRONTEND_KEY_RATE] = { .n = IST("current_frontend_ssl_key_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_FRONTEND_MAX_KEY_RATE] = { .n = IST("max_frontend_ssl_key_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = { .n = IST("frontend_ssl_reuse"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_BACKEND_KEY_RATE] = { .n = IST("current_backend_ssl_key_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_BACKEND_MAX_KEY_RATE] = { .n = IST("max_backend_ssl_key_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_CACHE_LOOKUPS] = { .n = IST("ssl_cache_lookups_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_SSL_CACHE_MISSES] = { .n = IST("ssl_cache_misses_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_COMPRESS_BPS_IN] = { .n = IST("http_comp_bytes_in_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_COMPRESS_BPS_OUT] = { .n = IST("http_comp_bytes_out_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_COMPRESS_BPS_RATE_LIM] = { .n = IST("limit_http_comp"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_ZLIB_MEM_USAGE] = { .n = IST("current_zlib_memory"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_MAX_ZLIB_MEM_USAGE] = { .n = IST("max_zlib_memory"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_TASKS] = { .n = IST("current_tasks"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_RUN_QUEUE] = { .n = IST("current_run_queue"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_IDLE_PCT] = { .n = IST("idle_time_percent"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
//[INF_NODE] ignored
//[INF_DESCRIPTION] ignored
[INF_STOPPING] = { .n = IST("stopping"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_JOBS] = { .n = IST("jobs"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_UNSTOPPABLE_JOBS] = { .n = IST("unstoppable_jobs"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_LISTENERS] = { .n = IST("listeners"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_ACTIVE_PEERS] = { .n = IST("active_peers"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_CONNECTED_PEERS] = { .n = IST("connected_peers"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_DROPPED_LOGS] = { .n = IST("dropped_logs_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_BUSY_POLLING] = { .n = IST("busy_polling_enabled"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
[INF_FAILED_RESOLUTIONS] = { .n = IST("failed_resolutions"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_TOTAL_BYTES_OUT] = { .n = IST("bytes_out_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_TOTAL_SPLICED_BYTES_OUT] = { .n = IST("spliced_bytes_out_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_BYTES_OUT_RATE] = { .n = IST("bytes_out_rate"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
//[INF_DEBUG_COMMANDS_ISSUED] ignored
[INF_CUM_LOG_MSGS] = { .n = IST("recv_logs_total"), .type = PROMEX_MT_COUNTER, .flags = PROMEX_FL_INFO_METRIC },
[INF_BUILD_INFO] = { .n = IST("build_info"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_INFO_METRIC },
};
/* frontend/backend/server fields */
const struct promex_metric promex_st_metrics[ST_F_TOTAL_FIELDS] = {
//[ST_F_PXNAME] ignored
//[ST_F_SVNAME] ignored
[ST_F_QCUR] = { .n = IST("current_queue"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_QMAX] = { .n = IST("max_queue"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_SCUR] = { .n = IST("current_sessions"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_SMAX] = { .n = IST("max_sessions"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_SLIM] = { .n = IST("limit_sessions"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_STOT] = { .n = IST("sessions_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_BIN] = { .n = IST("bytes_in_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_BOUT] = { .n = IST("bytes_out_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_DREQ] = { .n = IST("requests_denied_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_DRESP] = { .n = IST("responses_denied_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_EREQ] = { .n = IST("request_errors_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC ) },
[ST_F_ECON] = { .n = IST("connection_errors_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_ERESP] = { .n = IST("response_errors_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_WRETR] = { .n = IST("retry_warnings_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_WREDIS] = { .n = IST("redispatch_warnings_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_STATUS] = { .n = IST("status"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_WEIGHT] = { .n = IST("weight"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_ACT] = { .n = IST("active_servers"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC ) },
[ST_F_BCK] = { .n = IST("backup_servers"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC ) },
[ST_F_CHKFAIL] = { .n = IST("check_failures_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_CHKDOWN] = { .n = IST("check_up_down_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_LASTCHG] = { .n = IST("check_last_change_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_DOWNTIME] = { .n = IST("downtime_seconds_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_QLIMIT] = { .n = IST("queue_limit"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
//[ST_F_PID] ignored
//[ST_F_IID] ignored
//[ST_F_SID] ignored
[ST_F_THROTTLE] = { .n = IST("current_throttle"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_LBTOT] = { .n = IST("loadbalanced_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
//[ST_F_TRACKED] ignored
//[ST_F_TYPE] ignored
//[ST_F_RATE] ignored
[ST_F_RATE_LIM] = { .n = IST("limit_session_rate"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC ) },
[ST_F_RATE_MAX] = { .n = IST("max_session_rate"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_CHECK_STATUS] = { .n = IST("check_status"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_CHECK_CODE] = { .n = IST("check_code"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_CHECK_DURATION] = { .n = IST("check_duration_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_HRSP_1XX] = { .n = IST("http_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_HRSP_2XX] = { .n = IST("http_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_HRSP_3XX] = { .n = IST("http_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_HRSP_4XX] = { .n = IST("http_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_HRSP_5XX] = { .n = IST("http_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_HRSP_OTHER] = { .n = IST("http_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
//[ST_F_HANAFAIL] ignored
//[ST_F_REQ_RATE] ignored
[ST_F_REQ_RATE_MAX] = { .n = IST("http_requests_rate_max"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC ) },
[ST_F_REQ_TOT] = { .n = IST("http_requests_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_CLI_ABRT] = { .n = IST("client_aborts_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_SRV_ABRT] = { .n = IST("server_aborts_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_COMP_IN] = { .n = IST("http_comp_bytes_in_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_COMP_OUT] = { .n = IST("http_comp_bytes_out_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_COMP_BYP] = { .n = IST("http_comp_bytes_bypassed_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_COMP_RSP] = { .n = IST("http_comp_responses_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_LASTSESS] = { .n = IST("last_session_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
//[ST_F_LAST_CHK] ignored
//[ST_F_LAST_AGT] ignored
[ST_F_QTIME] = { .n = IST("queue_time_average_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_CTIME] = { .n = IST("connect_time_average_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_RTIME] = { .n = IST("response_time_average_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_TTIME] = { .n = IST("total_time_average_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
//[ST_F_AGENT_STATUS] ignored
//[ST_F_AGENT_CODE] ignored
//[ST_F_AGENT_DURATION] ignored
//[ST_F_CHECK_DESC] ignored
//[ST_F_AGENT_DESC] ignored
//[ST_F_CHECK_RISE] ignored
//[ST_F_CHECK_FALL] ignored
//[ST_F_CHECK_HEALTH] ignored
//[ST_F_AGENT_RISE] ignored
//[ST_F_AGENT_FALL] ignored
//[ST_F_AGENT_HEALTH] ignored
//[ST_F_ADDR] ignored
//[ST_F_COOKIE] ignored
//[ST_F_MODE] ignored
//[ST_F_ALGO] ignored
//[ST_F_CONN_RATE] ignored
[ST_F_CONN_RATE_MAX] = { .n = IST("connections_rate_max"), .type = PROMEX_MT_GAUGE, .flags = (PROMEX_FL_FRONT_METRIC ) },
[ST_F_CONN_TOT] = { .n = IST("connections_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC ) },
[ST_F_INTERCEPTED] = { .n = IST("intercepted_requests_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC ) },
[ST_F_DCON] = { .n = IST("denied_connections_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC ) },
[ST_F_DSES] = { .n = IST("denied_sessions_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC ) },
[ST_F_WREW] = { .n = IST("failed_header_rewriting_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_CONNECT] = { .n = IST("connection_attempts_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_REUSE] = { .n = IST("connection_reuses_total"), .type = PROMEX_MT_COUNTER, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_CACHE_LOOKUPS] = { .n = IST("http_cache_lookups_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_CACHE_HITS] = { .n = IST("http_cache_hits_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_BACK_METRIC ) },
[ST_F_SRV_ICUR] = { .n = IST("idle_connections_current"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_SRV_ILIM] = { .n = IST("idle_connections_limit"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_QT_MAX] = { .n = IST("max_queue_time_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_CT_MAX] = { .n = IST("max_connect_time_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_RT_MAX] = { .n = IST("max_response_time_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_TT_MAX] = { .n = IST("max_total_time_seconds"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_EINT] = { .n = IST("internal_errors_total"), .type = PROMEX_MT_COUNTER, .flags = (PROMEX_FL_FRONT_METRIC | PROMEX_FL_LI_METRIC | PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_IDLE_CONN_CUR] = { .n = IST("unsafe_idle_connections_current"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_SAFE_CONN_CUR] = { .n = IST("safe_idle_connections_current"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_USED_CONN_CUR] = { .n = IST("used_connections_current"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_NEED_CONN_EST] = { .n = IST("need_connections_current"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_SRV_METRIC) },
[ST_F_UWEIGHT] = { .n = IST("uweight"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC | PROMEX_FL_SRV_METRIC) },
[ST_F_AGG_SRV_CHECK_STATUS] = { .n = IST("agg_server_check_status"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC ) },
[ST_F_AGG_SRV_STATUS ] = { .n = IST("agg_server_status"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC ) },
[ST_F_AGG_CHECK_STATUS] = { .n = IST("agg_check_status"), .type = PROMEX_MT_GAUGE, .flags = ( PROMEX_FL_BACK_METRIC ) },
};
/* Description of overridden stats fields */
const struct ist promex_st_metric_desc[ST_F_TOTAL_FIELDS] = {
[ST_F_STATUS] = IST("Current status of the service, per state label value."),
[ST_F_CHECK_STATUS] = IST("Status of last health check, per state label value."),
[ST_F_CHECK_CODE] = IST("layer5-7 code, if available of the last health check."),
[ST_F_CHECK_DURATION] = IST("Total duration of the latest server health check, in seconds."),
[ST_F_QTIME] = IST("Avg. queue time for last 1024 successful connections."),
[ST_F_CTIME] = IST("Avg. connect time for last 1024 successful connections."),
[ST_F_RTIME] = IST("Avg. response time for last 1024 successful connections."),
[ST_F_TTIME] = IST("Avg. total time for last 1024 successful connections."),
[ST_F_QT_MAX] = IST("Maximum observed time spent in the queue"),
[ST_F_CT_MAX] = IST("Maximum observed time spent waiting for a connection to complete"),
[ST_F_RT_MAX] = IST("Maximum observed time spent waiting for a server response"),
[ST_F_TT_MAX] = IST("Maximum observed total request+response time (request+queue+connect+response+processing)"),
};
/* stick table base fields */
enum sticktable_field {
STICKTABLE_SIZE = 0,
STICKTABLE_USED,
/* must always be the last one */
STICKTABLE_TOTAL_FIELDS
};
const struct promex_metric promex_sticktable_metrics[STICKTABLE_TOTAL_FIELDS] = {
[STICKTABLE_SIZE] = { .n = IST("size"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_STICKTABLE_METRIC },
[STICKTABLE_USED] = { .n = IST("used"), .type = PROMEX_MT_GAUGE, .flags = PROMEX_FL_STICKTABLE_METRIC },
};
/* stick table base description */
const struct ist promex_sticktable_metric_desc[STICKTABLE_TOTAL_FIELDS] = {
[STICKTABLE_SIZE] = IST("Stick table size."),
[STICKTABLE_USED] = IST("Number of entries used in this stick table."),
};
/* Specific labels for all ST_F_HRSP_* fields */
const struct ist promex_hrsp_code[1 + ST_F_HRSP_OTHER - ST_F_HRSP_1XX] = {
[ST_F_HRSP_1XX - ST_F_HRSP_1XX] = IST("1xx"),
[ST_F_HRSP_2XX - ST_F_HRSP_1XX] = IST("2xx"),
[ST_F_HRSP_3XX - ST_F_HRSP_1XX] = IST("3xx"),
[ST_F_HRSP_4XX - ST_F_HRSP_1XX] = IST("4xx"),
[ST_F_HRSP_5XX - ST_F_HRSP_1XX] = IST("5xx"),
[ST_F_HRSP_OTHER - ST_F_HRSP_1XX] = IST("other"),
};
enum promex_front_state {
PROMEX_FRONT_STATE_DOWN = 0,
PROMEX_FRONT_STATE_UP,
PROMEX_FRONT_STATE_COUNT /* must be last */
};
const struct ist promex_front_st[PROMEX_FRONT_STATE_COUNT] = {
[PROMEX_FRONT_STATE_DOWN] = IST("DOWN"),
[PROMEX_FRONT_STATE_UP] = IST("UP"),
};
enum promex_back_state {
PROMEX_BACK_STATE_DOWN = 0,
PROMEX_BACK_STATE_UP,
PROMEX_BACK_STATE_COUNT /* must be last */
};
const struct ist promex_back_st[PROMEX_BACK_STATE_COUNT] = {
[PROMEX_BACK_STATE_DOWN] = IST("DOWN"),
[PROMEX_BACK_STATE_UP] = IST("UP"),
};
enum promex_srv_state {
PROMEX_SRV_STATE_DOWN = 0,
PROMEX_SRV_STATE_UP,
PROMEX_SRV_STATE_MAINT,
PROMEX_SRV_STATE_DRAIN,
PROMEX_SRV_STATE_NOLB,
PROMEX_SRV_STATE_COUNT /* must be last */
};
const struct ist promex_srv_st[PROMEX_SRV_STATE_COUNT] = {
[PROMEX_SRV_STATE_DOWN] = IST("DOWN"),
[PROMEX_SRV_STATE_UP] = IST("UP"),
[PROMEX_SRV_STATE_MAINT] = IST("MAINT"),
[PROMEX_SRV_STATE_DRAIN] = IST("DRAIN"),
[PROMEX_SRV_STATE_NOLB] = IST("NOLB"),
};
/* Return the server status. */
enum promex_srv_state promex_srv_status(struct server *sv)
{
int state = PROMEX_SRV_STATE_DOWN;
if (sv->cur_state == SRV_ST_RUNNING || sv->cur_state == SRV_ST_STARTING) {
state = PROMEX_SRV_STATE_UP;
if (sv->cur_admin & SRV_ADMF_DRAIN)
state = PROMEX_SRV_STATE_DRAIN;
}
else if (sv->cur_state == SRV_ST_STOPPING)
state = PROMEX_SRV_STATE_NOLB;
if (sv->cur_admin & SRV_ADMF_MAINT)
state = PROMEX_SRV_STATE_MAINT;
return state;
}
/* Convert a field to its string representation and write it in <out>, followed
* by a newline, if there is enough space. non-numeric value are converted in
* "NaN" because Prometheus only support numerical values (but it is unexepceted
* to process this kind of value). It returns 1 on success. Otherwise, it
* returns 0. The buffer's length must not exceed <max> value.
*/
static int promex_metric_to_str(struct buffer *out, struct field *f, size_t max)
{
int ret = 0;
switch (field_format(f, 0)) {
case FF_EMPTY: ret = chunk_strcat(out, "NaN\n"); break;
case FF_S32: ret = chunk_appendf(out, "%d\n", f->u.s32); break;
case FF_U32: ret = chunk_appendf(out, "%u\n", f->u.u32); break;
case FF_S64: ret = chunk_appendf(out, "%lld\n", (long long)f->u.s64); break;
case FF_U64: ret = chunk_appendf(out, "%llu\n", (unsigned long long)f->u.u64); break;
case FF_FLT: ret = chunk_appendf(out, "%f\n", f->u.flt); break;
case FF_STR: ret = chunk_strcat(out, "NaN\n"); break;
default: ret = chunk_strcat(out, "NaN\n"); break;
}
if (!ret || out->data > max)
return 0;
return 1;
}
/* Dump the header lines for <metric>. It is its #HELP and #TYPE strings. It
* returns 1 on success. Otherwise, if <out> length exceeds <max>, it returns 0.
*/
static int promex_dump_metric_header(struct appctx *appctx, struct htx *htx,
const struct promex_metric *metric, const struct ist name,
struct ist *out, size_t max)
{
struct promex_ctx *ctx = appctx->svcctx;
struct ist type;
struct ist desc;
switch (metric->type) {
case PROMEX_MT_COUNTER:
type = ist("counter");
break;
default:
type = ist("gauge");
}
if (istcat(out, ist("# HELP "), max) == -1 ||
istcat(out, name, max) == -1 ||
istcat(out, ist(" "), max) == -1)
goto full;
if (metric->flags & PROMEX_FL_INFO_METRIC)
desc = ist(info_fields[ctx->field_num].desc);
else if (metric->flags & PROMEX_FL_STICKTABLE_METRIC)
desc = promex_sticktable_metric_desc[ctx->field_num];
else if (!isttest(promex_st_metric_desc[ctx->field_num]))
desc = ist(stat_fields[ctx->field_num].desc);
else
desc = promex_st_metric_desc[ctx->field_num];
if (istcat(out, desc, max) == -1 ||
istcat(out, ist("\n# TYPE "), max) == -1 ||
istcat(out, name, max) == -1 ||
istcat(out, ist(" "), max) == -1 ||
istcat(out, type, max) == -1 ||
istcat(out, ist("\n"), max) == -1)
goto full;
return 1;
full:
return 0;
}
/* Dump the line for <metric>. It starts by the metric name followed by its
* labels (proxy name, server name...) between braces and finally its value. If
* not already done, the header lines are dumped first. It returns 1 on
* success. Otherwise if <out> length exceeds <max>, it returns 0.
*/
static int promex_dump_metric(struct appctx *appctx, struct htx *htx, struct ist prefix,
const struct promex_metric *metric, struct field *val,
struct promex_label *labels, struct ist *out, size_t max)
{
struct ist name = { .ptr = (char[PROMEX_MAX_NAME_LEN]){ 0 }, .len = 0 };
struct promex_ctx *ctx = appctx->svcctx;
size_t len = out->len;
if (out->len + PROMEX_MAX_METRIC_LENGTH > max)
return 0;
/* Fill the metric name */
istcat(&name, prefix, PROMEX_MAX_NAME_LEN);
istcat(&name, metric->n, PROMEX_MAX_NAME_LEN);
if ((ctx->flags & PROMEX_FL_METRIC_HDR) &&
!promex_dump_metric_header(appctx, htx, metric, name, out, max))
goto full;
if (istcat(out, name, max) == -1)
goto full;
if (isttest(labels[0].name)) {
int i;
if (istcat(out, ist("{"), max) == -1)
goto full;
for (i = 0; isttest(labels[i].name); i++) {
if (!isttest(labels[i].value))
continue;
if ((i && istcat(out, ist(","), max) == -1) ||
istcat(out, labels[i].name, max) == -1 ||
istcat(out, ist("=\""), max) == -1 ||
istcat(out, labels[i].value, max) == -1 ||
istcat(out, ist("\""), max) == -1)
goto full;
}
if (istcat(out, ist("}"), max) == -1)
goto full;
}
if (istcat(out, ist(" "), max) == -1)
goto full;
trash.data = out->len;
if (!promex_metric_to_str(&trash, val, max))
goto full;
out->len = trash.data;
ctx->flags &= ~PROMEX_FL_METRIC_HDR;
return 1;
full:
// Restore previous length
out->len = len;
return 0;
}
/* Dump global metrics (prefixed by "haproxy_process_"). It returns 1 on success,
* 0 if <htx> is full and -1 in case of any error. */
static int promex_dump_global_metrics(struct appctx *appctx, struct htx *htx)
{
static struct ist prefix = IST("haproxy_process_");
struct promex_ctx *ctx = appctx->svcctx;
struct field val;
struct channel *chn = sc_ic(appctx_sc(appctx));
struct ist out = ist2(trash.area, 0);
size_t max = htx_get_max_blksz(htx, channel_htx_recv_max(chn, htx));
int ret = 1;
if (!stats_fill_info(info, INF_TOTAL_FIELDS, 0))
return -1;
for (; ctx->field_num < INF_TOTAL_FIELDS; ctx->field_num++) {
struct promex_label labels[PROMEX_MAX_LABELS-1] = {};
if (!(promex_global_metrics[ctx->field_num].flags & ctx->flags))
continue;
switch (ctx->field_num) {
case INF_BUILD_INFO:
labels[0].name = ist("version");
labels[0].value = ist(HAPROXY_VERSION);
val = mkf_u32(FN_GAUGE, 1);
break;
default:
val = info[ctx->field_num];
}
if (!promex_dump_metric(appctx, htx, prefix, &promex_global_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
ctx->flags |= PROMEX_FL_METRIC_HDR;
}
end:
if (out.len) {
if (!htx_add_data_atonce(htx, out))
return -1; /* Unexpected and unrecoverable error */
channel_add_input(chn, out.len);
}
return ret;
full:
ret = 0;
goto end;
}
/* Dump frontends metrics (prefixed by "haproxy_frontend_"). It returns 1 on success,
* 0 if <htx> is full and -1 in case of any error. */
static int promex_dump_front_metrics(struct appctx *appctx, struct htx *htx)
{
static struct ist prefix = IST("haproxy_frontend_");
struct promex_ctx *ctx = appctx->svcctx;
struct proxy *px;
struct field val;
struct channel *chn = sc_ic(appctx_sc(appctx));
struct ist out = ist2(trash.area, 0);
size_t max = htx_get_max_blksz(htx, channel_htx_recv_max(chn, htx));
struct field *stats = stat_l[STATS_DOMAIN_PROXY];
int ret = 1;
enum promex_front_state state;
for (;ctx->field_num < ST_F_TOTAL_FIELDS; ctx->field_num++) {
if (!(promex_st_metrics[ctx->field_num].flags & ctx->flags))
continue;
while (ctx->px) {
struct promex_label labels[PROMEX_MAX_LABELS-1] = {};
px = ctx->px;
labels[0].name = ist("proxy");
labels[0].value = ist2(px->id, strlen(px->id));
/* skip the disabled proxies, global frontend and non-networked ones */
if ((px->flags & PR_FL_DISABLED) || px->uuid <= 0 || !(px->cap & PR_CAP_FE))
goto next_px;
if (!stats_fill_fe_stats(px, stats, ST_F_TOTAL_FIELDS, &(ctx->field_num)))
return -1;
switch (ctx->field_num) {
case ST_F_STATUS:
state = !(px->flags & PR_FL_STOPPED);
for (; ctx->obj_state < PROMEX_FRONT_STATE_COUNT; ctx->obj_state++) {
labels[1].name = ist("state");
labels[1].value = promex_front_st[ctx->obj_state];
val = mkf_u32(FO_STATUS, state == ctx->obj_state);
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
goto next_px;
case ST_F_REQ_RATE_MAX:
case ST_F_REQ_TOT:
case ST_F_INTERCEPTED:
case ST_F_CACHE_LOOKUPS:
case ST_F_CACHE_HITS:
case ST_F_COMP_IN:
case ST_F_COMP_OUT:
case ST_F_COMP_BYP:
case ST_F_COMP_RSP:
if (px->mode != PR_MODE_HTTP)
goto next_px;
val = stats[ctx->field_num];
break;
case ST_F_HRSP_1XX:
case ST_F_HRSP_2XX:
case ST_F_HRSP_3XX:
case ST_F_HRSP_4XX:
case ST_F_HRSP_5XX:
case ST_F_HRSP_OTHER:
if (px->mode != PR_MODE_HTTP)
goto next_px;
if (ctx->field_num != ST_F_HRSP_1XX)
ctx->flags &= ~PROMEX_FL_METRIC_HDR;
labels[1].name = ist("code");
labels[1].value = promex_hrsp_code[ctx->field_num - ST_F_HRSP_1XX];
val = stats[ctx->field_num];
break;
default:
val = stats[ctx->field_num];
}
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
next_px:
ctx->px = px->next;
}
ctx->flags |= PROMEX_FL_METRIC_HDR;
ctx->px = proxies_list;
}
end:
if (out.len) {
if (!htx_add_data_atonce(htx, out))
return -1; /* Unexpected and unrecoverable error */
channel_add_input(chn, out.len);
}
return ret;
full:
ret = 0;
goto end;
}
/* Dump listener metrics (prefixed by "haproxy_listen_"). It returns 1 on
* success, 0 if <htx> is full and -1 in case of any error. */
static int promex_dump_listener_metrics(struct appctx *appctx, struct htx *htx)
{
static struct ist prefix = IST("haproxy_listener_");
struct promex_ctx *ctx = appctx->svcctx;
struct proxy *px;
struct field val;
struct channel *chn = sc_ic(appctx_sc(appctx));
struct ist out = ist2(trash.area, 0);
size_t max = htx_get_max_blksz(htx, channel_htx_recv_max(chn, htx));
struct field *stats = stat_l[STATS_DOMAIN_PROXY];
struct listener *li;
int ret = 1;
enum li_status status;
for (;ctx->field_num < ST_F_TOTAL_FIELDS; ctx->field_num++) {
if (!(promex_st_metrics[ctx->field_num].flags & ctx->flags))
continue;
while (ctx->px) {
struct promex_label labels[PROMEX_MAX_LABELS-1] = {};
px = ctx->px;
labels[0].name = ist("proxy");
labels[0].value = ist2(px->id, strlen(px->id));
/* skip the disabled proxies, global frontend and non-networked ones */
if ((px->flags & PR_FL_DISABLED) || px->uuid <= 0 || !(px->cap & PR_CAP_FE))
goto next_px;
li = ctx->li;
list_for_each_entry_from(li, &px->conf.listeners, by_fe) {
if (!li->counters)
continue;
labels[1].name = ist("listener");
labels[1].value = ist2(li->name, strlen(li->name));
if (!stats_fill_li_stats(px, li, 0, stats,
ST_F_TOTAL_FIELDS, &(ctx->field_num)))
return -1;
switch (ctx->field_num) {
case ST_F_STATUS:
status = get_li_status(li);
for (; ctx->obj_state < LI_STATE_COUNT; ctx->obj_state++) {
val = mkf_u32(FO_STATUS, status == ctx->obj_state);
labels[2].name = ist("state");
labels[2].value = ist(li_status_st[ctx->obj_state]);
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
continue;
default:
val = stats[ctx->field_num];
}
if (!promex_dump_metric(appctx, htx, prefix,
&promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
next_px:
px = px->next;
ctx->px = px;
ctx->li = (px ? LIST_NEXT(&px->conf.listeners, struct listener *, by_fe) : NULL);
}
ctx->flags |= PROMEX_FL_METRIC_HDR;
ctx->px = proxies_list;
ctx->li = LIST_NEXT(&proxies_list->conf.listeners, struct listener *, by_fe);
}
end:
if (out.len) {
if (!htx_add_data_atonce(htx, out))
return -1; /* Unexpected and unrecoverable error */
channel_add_input(chn, out.len);
}
return ret;
full:
ctx->li = li;
ret = 0;
goto end;
}
/* Dump backends metrics (prefixed by "haproxy_backend_"). It returns 1 on success,
* 0 if <htx> is full and -1 in case of any error. */
static int promex_dump_back_metrics(struct appctx *appctx, struct htx *htx)
{
static struct ist prefix = IST("haproxy_backend_");
struct promex_ctx *ctx = appctx->svcctx;
struct proxy *px;
struct server *sv;
struct field val;
struct channel *chn = sc_ic(appctx_sc(appctx));
struct ist out = ist2(trash.area, 0);
size_t max = htx_get_max_blksz(htx, channel_htx_recv_max(chn, htx));
struct field *stats = stat_l[STATS_DOMAIN_PROXY];
int ret = 1;
double secs;
enum promex_back_state bkd_state;
enum promex_srv_state srv_state;
enum healthcheck_status srv_check_status;
for (;ctx->field_num < ST_F_TOTAL_FIELDS; ctx->field_num++) {
if (!(promex_st_metrics[ctx->field_num].flags & ctx->flags))
continue;
while (ctx->px) {
struct promex_label labels[PROMEX_MAX_LABELS-1] = {};
unsigned int srv_state_count[PROMEX_SRV_STATE_COUNT] = { 0 };
unsigned int srv_check_count[HCHK_STATUS_SIZE] = { 0 };
const char *check_state;
px = ctx->px;
labels[0].name = ist("proxy");
labels[0].value = ist2(px->id, strlen(px->id));
/* skip the disabled proxies, global frontend and non-networked ones */
if ((px->flags & PR_FL_DISABLED) || px->uuid <= 0 || !(px->cap & PR_CAP_BE))
goto next_px;
if (!stats_fill_be_stats(px, 0, stats, ST_F_TOTAL_FIELDS, &(ctx->field_num)))
return -1;
switch (ctx->field_num) {
case ST_F_AGG_SRV_CHECK_STATUS: // DEPRECATED
case ST_F_AGG_SRV_STATUS:
if (!px->srv)
goto next_px;
sv = px->srv;
while (sv) {
srv_state = promex_srv_status(sv);
srv_state_count[srv_state] += 1;
sv = sv->next;
}
for (; ctx->obj_state < PROMEX_SRV_STATE_COUNT; ctx->obj_state++) {
val = mkf_u32(FN_GAUGE, srv_state_count[ctx->obj_state]);
labels[1].name = ist("state");
labels[1].value = promex_srv_st[ctx->obj_state];
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
goto next_px;
case ST_F_AGG_CHECK_STATUS:
if (!px->srv)
goto next_px;
sv = px->srv;
while (sv) {
srv_check_status = sv->check.status;
srv_check_count[srv_check_status] += 1;
sv = sv->next;
}
for (; ctx->obj_state < HCHK_STATUS_SIZE; ctx->obj_state++) {
if (get_check_status_result(ctx->obj_state) < CHK_RES_FAILED)
continue;
val = mkf_u32(FO_STATUS, srv_check_count[ctx->obj_state]);
check_state = get_check_status_info(ctx->obj_state);
labels[1].name = ist("state");
labels[1].value = ist(check_state);
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
goto next_px;
case ST_F_STATUS:
bkd_state = ((px->lbprm.tot_weight > 0 || !px->srv) ? 1 : 0);
for (; ctx->obj_state < PROMEX_BACK_STATE_COUNT; ctx->obj_state++) {
labels[1].name = ist("state");
labels[1].value = promex_back_st[ctx->obj_state];
val = mkf_u32(FO_STATUS, bkd_state == ctx->obj_state);
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
goto next_px;
case ST_F_QTIME:
secs = (double)swrate_avg(px->be_counters.q_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_CTIME:
secs = (double)swrate_avg(px->be_counters.c_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_RTIME:
secs = (double)swrate_avg(px->be_counters.d_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_TTIME:
secs = (double)swrate_avg(px->be_counters.t_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_QT_MAX:
secs = (double)px->be_counters.qtime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_CT_MAX:
secs = (double)px->be_counters.ctime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_RT_MAX:
secs = (double)px->be_counters.dtime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_TT_MAX:
secs = (double)px->be_counters.ttime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_REQ_TOT:
case ST_F_CACHE_LOOKUPS:
case ST_F_CACHE_HITS:
case ST_F_COMP_IN:
case ST_F_COMP_OUT:
case ST_F_COMP_BYP:
case ST_F_COMP_RSP:
if (px->mode != PR_MODE_HTTP)
goto next_px;
val = stats[ctx->field_num];
break;
case ST_F_HRSP_1XX:
case ST_F_HRSP_2XX:
case ST_F_HRSP_3XX:
case ST_F_HRSP_4XX:
case ST_F_HRSP_5XX:
case ST_F_HRSP_OTHER:
if (px->mode != PR_MODE_HTTP)
goto next_px;
if (ctx->field_num != ST_F_HRSP_1XX)
ctx->flags &= ~PROMEX_FL_METRIC_HDR;
labels[1].name = ist("code");
labels[1].value = promex_hrsp_code[ctx->field_num - ST_F_HRSP_1XX];
val = stats[ctx->field_num];
break;
default:
val = stats[ctx->field_num];
}
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
next_px:
ctx->px = px->next;
}
ctx->flags |= PROMEX_FL_METRIC_HDR;
ctx->px = proxies_list;
}
end:
if (out.len) {
if (!htx_add_data_atonce(htx, out))
return -1; /* Unexpected and unrecoverable error */
channel_add_input(chn, out.len);
}
return ret;
full:
ret = 0;
goto end;
}
/* Dump servers metrics (prefixed by "haproxy_server_"). It returns 1 on success,
* 0 if <htx> is full and -1 in case of any error. */
static int promex_dump_srv_metrics(struct appctx *appctx, struct htx *htx)
{
static struct ist prefix = IST("haproxy_server_");
struct promex_ctx *ctx = appctx->svcctx;
struct proxy *px;
struct server *sv;
struct field val;
struct channel *chn = sc_ic(appctx_sc(appctx));
struct ist out = ist2(trash.area, 0);
size_t max = htx_get_max_blksz(htx, channel_htx_recv_max(chn, htx));
struct field *stats = stat_l[STATS_DOMAIN_PROXY];
int ret = 1;
double secs;
enum promex_srv_state state;
const char *check_state;
for (;ctx->field_num < ST_F_TOTAL_FIELDS; ctx->field_num++) {
if (!(promex_st_metrics[ctx->field_num].flags & ctx->flags))
continue;
while (ctx->px) {
struct promex_label labels[PROMEX_MAX_LABELS-1] = {};
px = ctx->px;
labels[0].name = ist("proxy");
labels[0].value = ist2(px->id, strlen(px->id));
/* skip the disabled proxies, global frontend and non-networked ones */
if ((px->flags & PR_FL_DISABLED) || px->uuid <= 0 || !(px->cap & PR_CAP_BE))
goto next_px;
while (ctx->sv) {
sv = ctx->sv;
labels[1].name = ist("server");
labels[1].value = ist2(sv->id, strlen(sv->id));
if (!stats_fill_sv_stats(px, sv, 0, stats, ST_F_TOTAL_FIELDS, &(ctx->field_num)))
return -1;
if ((ctx->flags & PROMEX_FL_NO_MAINT_SRV) && (sv->cur_admin & SRV_ADMF_MAINT))
goto next_sv;
switch (ctx->field_num) {
case ST_F_STATUS:
state = promex_srv_status(sv);
for (; ctx->obj_state < PROMEX_SRV_STATE_COUNT; ctx->obj_state++) {
val = mkf_u32(FO_STATUS, state == ctx->obj_state);
labels[2].name = ist("state");
labels[2].value = promex_srv_st[ctx->obj_state];
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
goto next_sv;
case ST_F_QTIME:
secs = (double)swrate_avg(sv->counters.q_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_CTIME:
secs = (double)swrate_avg(sv->counters.c_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_RTIME:
secs = (double)swrate_avg(sv->counters.d_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_TTIME:
secs = (double)swrate_avg(sv->counters.t_time, TIME_STATS_SAMPLES) / 1000.0;
val = mkf_flt(FN_AVG, secs);
break;
case ST_F_QT_MAX:
secs = (double)sv->counters.qtime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_CT_MAX:
secs = (double)sv->counters.ctime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_RT_MAX:
secs = (double)sv->counters.dtime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_TT_MAX:
secs = (double)sv->counters.ttime_max / 1000.0;
val = mkf_flt(FN_MAX, secs);
break;
case ST_F_CHECK_STATUS:
if ((sv->check.state & (CHK_ST_ENABLED|CHK_ST_PAUSED)) != CHK_ST_ENABLED)
goto next_sv;
for (; ctx->obj_state < HCHK_STATUS_SIZE; ctx->obj_state++) {
if (get_check_status_result(ctx->obj_state) < CHK_RES_FAILED)
continue;
val = mkf_u32(FO_STATUS, sv->check.status == ctx->obj_state);
check_state = get_check_status_info(ctx->obj_state);
labels[2].name = ist("state");
labels[2].value = ist(check_state);
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
}
ctx->obj_state = 0;
goto next_sv;
case ST_F_CHECK_CODE:
if ((sv->check.state & (CHK_ST_ENABLED|CHK_ST_PAUSED)) != CHK_ST_ENABLED)
goto next_sv;
val = mkf_u32(FN_OUTPUT, (sv->check.status < HCHK_STATUS_L57DATA) ? 0 : sv->check.code);
break;
case ST_F_CHECK_DURATION:
if (sv->check.status < HCHK_STATUS_CHECKED)
goto next_sv;
secs = (double)sv->check.duration / 1000.0;
val = mkf_flt(FN_DURATION, secs);
break;
case ST_F_REQ_TOT:
if (px->mode != PR_MODE_HTTP)
goto next_px;
val = stats[ctx->field_num];
break;
case ST_F_HRSP_1XX:
case ST_F_HRSP_2XX:
case ST_F_HRSP_3XX:
case ST_F_HRSP_4XX:
case ST_F_HRSP_5XX:
case ST_F_HRSP_OTHER:
if (px->mode != PR_MODE_HTTP)
goto next_px;
if (ctx->field_num != ST_F_HRSP_1XX)
ctx->flags &= ~PROMEX_FL_METRIC_HDR;
labels[2].name = ist("code");
labels[2].value = promex_hrsp_code[ctx->field_num - ST_F_HRSP_1XX];
val = stats[ctx->field_num];
break;
default:
val = stats[ctx->field_num];
}
if (!promex_dump_metric(appctx, htx, prefix, &promex_st_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
next_sv:
ctx->sv = sv->next;
}
next_px:
ctx->px = px->next;
ctx->sv = (ctx->px ? ctx->px->srv : NULL);
}
ctx->flags |= PROMEX_FL_METRIC_HDR;
ctx->px = proxies_list;
ctx->sv = (ctx->px ? ctx->px->srv : NULL);
}
end:
if (out.len) {
if (!htx_add_data_atonce(htx, out))
return -1; /* Unexpected and unrecoverable error */
channel_add_input(chn, out.len);
}
return ret;
full:
ret = 0;
goto end;
}
/* Dump stick table metrics (prefixed by "haproxy_sticktable_"). It returns 1 on success,
* 0 if <htx> is full and -1 in case of any error. */
static int promex_dump_sticktable_metrics(struct appctx *appctx, struct htx *htx)
{
static struct ist prefix = IST("haproxy_sticktable_");
struct promex_ctx *ctx = appctx->svcctx;
struct field val;
struct channel *chn = sc_ic(appctx_sc(appctx));
struct ist out = ist2(trash.area, 0);
size_t max = htx_get_max_blksz(htx, channel_htx_recv_max(chn, htx));
int ret = 1;
struct stktable *t;
for (; ctx->field_num < STICKTABLE_TOTAL_FIELDS; ctx->field_num++) {
if (!(promex_sticktable_metrics[ctx->field_num].flags & ctx->flags))
continue;
while (ctx->st) {
struct promex_label labels[PROMEX_MAX_LABELS - 1] = {};
t = ctx->st;
if (!t->size)
goto next_px;
labels[0].name = ist("name");
labels[0].value = ist2(t->id, strlen(t->id));
labels[1].name = ist("type");
labels[1].value = ist2(stktable_types[t->type].kw, strlen(stktable_types[t->type].kw));
switch (ctx->field_num) {
case STICKTABLE_SIZE:
val = mkf_u32(FN_GAUGE, t->size);
break;
case STICKTABLE_USED:
val = mkf_u32(FN_GAUGE, t->current);
break;
default:
goto next_px;
}
if (!promex_dump_metric(appctx, htx, prefix,
&promex_sticktable_metrics[ctx->field_num],
&val, labels, &out, max))
goto full;
next_px:
ctx->st = t->next;
}
ctx->flags |= PROMEX_FL_METRIC_HDR;
ctx->st = stktables_list;
}
end:
if (out.len) {
if (!htx_add_data_atonce(htx, out))
return -1; /* Unexpected and unrecoverable error */
channel_add_input(chn, out.len);
}
return ret;
full:
ret = 0;
goto end;
}
/* Dump all metrics (global, frontends, backends and servers) depending on the
* dumper state (appctx->st1). It returns 1 on success, 0 if <htx> is full and
* -1 in case of any error.
* Uses <appctx.ctx.stats.px> as a pointer to the current proxy and <sv>/<li>
* as pointers to the current server/listener respectively.
*/
static int promex_dump_metrics(struct appctx *appctx, struct stconn *sc, struct htx *htx)
{
struct promex_ctx *ctx = appctx->svcctx;
int ret;
switch (appctx->st1) {
case PROMEX_DUMPER_INIT:
ctx->px = NULL;
ctx->st = NULL;
ctx->li = NULL;
ctx->sv = NULL;
ctx->flags |= (PROMEX_FL_METRIC_HDR|PROMEX_FL_INFO_METRIC);
ctx->obj_state = 0;
ctx->field_num = INF_NAME;
appctx->st1 = PROMEX_DUMPER_GLOBAL;
__fallthrough;
case PROMEX_DUMPER_GLOBAL:
if (ctx->flags & PROMEX_FL_SCOPE_GLOBAL) {
ret = promex_dump_global_metrics(appctx, htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto full;
}
}
ctx->px = proxies_list;
ctx->st = NULL;
ctx->li = NULL;
ctx->sv = NULL;
ctx->flags &= ~PROMEX_FL_INFO_METRIC;
ctx->flags |= (PROMEX_FL_METRIC_HDR|PROMEX_FL_FRONT_METRIC);
ctx->obj_state = 0;
ctx->field_num = ST_F_PXNAME;
appctx->st1 = PROMEX_DUMPER_FRONT;
__fallthrough;
case PROMEX_DUMPER_FRONT:
if (ctx->flags & PROMEX_FL_SCOPE_FRONT) {
ret = promex_dump_front_metrics(appctx, htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto full;
}
}
ctx->px = proxies_list;
ctx->st = NULL;
ctx->li = LIST_NEXT(&proxies_list->conf.listeners, struct listener *, by_fe);
ctx->sv = NULL;
ctx->flags &= ~PROMEX_FL_FRONT_METRIC;
ctx->flags |= (PROMEX_FL_METRIC_HDR|PROMEX_FL_LI_METRIC);
ctx->obj_state = 0;
ctx->field_num = ST_F_PXNAME;
appctx->st1 = PROMEX_DUMPER_LI;
__fallthrough;
case PROMEX_DUMPER_LI:
if (ctx->flags & PROMEX_FL_SCOPE_LI) {
ret = promex_dump_listener_metrics(appctx, htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto full;
}
}
ctx->px = proxies_list;
ctx->st = NULL;
ctx->li = NULL;
ctx->sv = NULL;
ctx->flags &= ~PROMEX_FL_LI_METRIC;
ctx->flags |= (PROMEX_FL_METRIC_HDR|PROMEX_FL_BACK_METRIC);
ctx->obj_state = 0;
ctx->field_num = ST_F_PXNAME;
appctx->st1 = PROMEX_DUMPER_BACK;
__fallthrough;
case PROMEX_DUMPER_BACK:
if (ctx->flags & PROMEX_FL_SCOPE_BACK) {
ret = promex_dump_back_metrics(appctx, htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto full;
}
}
ctx->px = proxies_list;
ctx->st = NULL;
ctx->li = NULL;
ctx->sv = ctx->px ? ctx->px->srv : NULL;
ctx->flags &= ~PROMEX_FL_BACK_METRIC;
ctx->flags |= (PROMEX_FL_METRIC_HDR|PROMEX_FL_SRV_METRIC);
ctx->obj_state = 0;
ctx->field_num = ST_F_PXNAME;
appctx->st1 = PROMEX_DUMPER_SRV;
__fallthrough;
case PROMEX_DUMPER_SRV:
if (ctx->flags & PROMEX_FL_SCOPE_SERVER) {
ret = promex_dump_srv_metrics(appctx, htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto full;
}
}
ctx->px = NULL;
ctx->st = stktables_list;
ctx->li = NULL;
ctx->sv = NULL;
ctx->flags &= ~(PROMEX_FL_METRIC_HDR|PROMEX_FL_SRV_METRIC);
ctx->flags |= (PROMEX_FL_METRIC_HDR|PROMEX_FL_STICKTABLE_METRIC);
ctx->field_num = STICKTABLE_SIZE;
appctx->st1 = PROMEX_DUMPER_STICKTABLE;
__fallthrough;
case PROMEX_DUMPER_STICKTABLE:
if (ctx->flags & PROMEX_FL_SCOPE_STICKTABLE) {
ret = promex_dump_sticktable_metrics(appctx, htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto full;
}
}
ctx->px = NULL;
ctx->st = NULL;
ctx->li = NULL;
ctx->sv = NULL;
ctx->flags &= ~(PROMEX_FL_METRIC_HDR|PROMEX_FL_STICKTABLE_METRIC);
ctx->field_num = 0;
appctx->st1 = PROMEX_DUMPER_DONE;
__fallthrough;
case PROMEX_DUMPER_DONE:
default:
break;
}
return 1;
full:
sc_need_room(sc);
return 0;
error:
/* unrecoverable error */
ctx->px = NULL;
ctx->st = NULL;
ctx->li = NULL;
ctx->sv = NULL;
ctx->flags = 0;
ctx->field_num = 0;
appctx->st1 = PROMEX_DUMPER_DONE;
return -1;
}
/* Parse the query string of request URI to filter the metrics. It returns 1 on
* success and -1 on error. */
static int promex_parse_uri(struct appctx *appctx, struct stconn *sc)
{
struct promex_ctx *ctx = appctx->svcctx;
struct channel *req = sc_oc(sc);
struct channel *res = sc_ic(sc);
struct htx *req_htx, *res_htx;
struct htx_sl *sl;
char *p, *key, *value;
const char *end;
struct buffer *err;
int default_scopes = PROMEX_FL_SCOPE_ALL;
int len;
/* Get the query-string */
req_htx = htxbuf(&req->buf);
sl = http_get_stline(req_htx);
if (!sl)
goto error;
p = http_find_param_list(HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl), '?');
if (!p)
goto end;
end = HTX_SL_REQ_UPTR(sl) + HTX_SL_REQ_ULEN(sl);
/* copy the query-string */
len = end - p;
chunk_reset(&trash);
memcpy(trash.area, p, len);
trash.area[len] = 0;
p = trash.area;
end = trash.area + len;
/* Parse the query-string */
while (p < end && *p && *p != '#') {
value = NULL;
/* decode parameter name */
key = p;
while (p < end && *p != '=' && *p != '&' && *p != '#')
++p;
/* found a value */
if (*p == '=') {
*(p++) = 0;
value = p;
}
else if (*p == '&')
*(p++) = 0;
else if (*p == '#')
*p = 0;
len = url_decode(key, 1);
if (len == -1)
goto error;
/* decode value */
if (value) {
while (p < end && *p != '=' && *p != '&' && *p != '#')
++p;
if (*p == '=')
goto error;
if (*p == '&')
*(p++) = 0;
else if (*p == '#')
*p = 0;
len = url_decode(value, 1);
if (len == -1)
goto error;
}
if (strcmp(key, "scope") == 0) {
default_scopes = 0; /* at least a scope defined, unset default scopes */
if (!value)
goto error;
else if (*value == 0)
ctx->flags &= ~PROMEX_FL_SCOPE_ALL;
else if (*value == '*')
ctx->flags |= PROMEX_FL_SCOPE_ALL;
else if (strcmp(value, "global") == 0)
ctx->flags |= PROMEX_FL_SCOPE_GLOBAL;
else if (strcmp(value, "server") == 0)
ctx->flags |= PROMEX_FL_SCOPE_SERVER;
else if (strcmp(value, "backend") == 0)
ctx->flags |= PROMEX_FL_SCOPE_BACK;
else if (strcmp(value, "frontend") == 0)
ctx->flags |= PROMEX_FL_SCOPE_FRONT;
else if (strcmp(value, "listener") == 0)
ctx->flags |= PROMEX_FL_SCOPE_LI;
else if (strcmp(value, "sticktable") == 0)
ctx->flags |= PROMEX_FL_SCOPE_STICKTABLE;
else
goto error;
}
else if (strcmp(key, "no-maint") == 0)
ctx->flags |= PROMEX_FL_NO_MAINT_SRV;
}
end:
ctx->flags |= default_scopes;
return 1;
error:
err = &http_err_chunks[HTTP_ERR_400];
channel_erase(res);
res->buf.data = b_data(err);
memcpy(res->buf.area, b_head(err), b_data(err));
res_htx = htx_from_buf(&res->buf);
channel_add_input(res, res_htx->data);
return -1;
}
/* Send HTTP headers of the response. It returns 1 on success and 0 if <htx> is
* full. */
static int promex_send_headers(struct appctx *appctx, struct stconn *sc, struct htx *htx)
{
struct channel *chn = sc_ic(sc);
struct htx_sl *sl;
unsigned int flags;
flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_ENC|HTX_SL_F_XFER_LEN|HTX_SL_F_CHNK);
sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), ist("200"), ist("OK"));
if (!sl)
goto full;
sl->info.res.status = 200;
if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
!htx_add_header(htx, ist("Content-Type"), ist("text/plain; version=0.0.4")) ||
!htx_add_header(htx, ist("Transfer-Encoding"), ist("chunked")) ||
!htx_add_endof(htx, HTX_BLK_EOH))
goto full;
channel_add_input(chn, htx->data);
return 1;
full:
htx_reset(htx);
sc_need_room(sc);
return 0;
}
/* The function returns 1 if the initialisation is complete, 0 if
* an errors occurs and -1 if more data are required for initializing
* the applet.
*/
static int promex_appctx_init(struct appctx *appctx)
{
applet_reserve_svcctx(appctx, sizeof(struct promex_ctx));
appctx->st0 = PROMEX_ST_INIT;
return 0;
}
/* The main I/O handler for the promex applet. */
static void promex_appctx_handle_io(struct appctx *appctx)
{
struct stconn *sc = appctx_sc(appctx);
struct stream *s = __sc_strm(sc);
struct channel *req = sc_oc(sc);
struct channel *res = sc_ic(sc);
struct htx *req_htx, *res_htx;
int ret;
res_htx = htx_from_buf(&res->buf);
if (unlikely(se_fl_test(appctx->sedesc, (SE_FL_EOS|SE_FL_ERROR|SE_FL_SHR|SE_FL_SHW))))
goto out;
/* Check if the input buffer is available. */
if (!b_size(&res->buf)) {
sc_need_room(sc);
goto out;
}
switch (appctx->st0) {
case PROMEX_ST_INIT:
ret = promex_parse_uri(appctx, sc);
if (ret <= 0) {
if (ret == -1)
goto error;
goto out;
}
appctx->st0 = PROMEX_ST_HEAD;
appctx->st1 = PROMEX_DUMPER_INIT;
__fallthrough;
case PROMEX_ST_HEAD:
if (!promex_send_headers(appctx, sc, res_htx))
goto out;
appctx->st0 = ((s->txn->meth == HTTP_METH_HEAD) ? PROMEX_ST_DONE : PROMEX_ST_DUMP);
__fallthrough;
case PROMEX_ST_DUMP:
ret = promex_dump_metrics(appctx, sc, res_htx);
if (ret <= 0) {
if (ret == -1)
goto error;
goto out;
}
appctx->st0 = PROMEX_ST_DONE;
__fallthrough;
case PROMEX_ST_DONE:
/* no more data are expected. If the response buffer is
* empty, be sure to add something (EOT block in this
* case) to have something to send. It is important to
* be sure the EOM flags will be handled by the
* endpoint.
*/
if (htx_is_empty(res_htx)) {
if (!htx_add_endof(res_htx, HTX_BLK_EOT)) {
sc_need_room(sc);
goto out;
}
channel_add_input(res, 1);
}
res_htx->flags |= HTX_FL_EOM;
se_fl_set(appctx->sedesc, SE_FL_EOI);
appctx->st0 = PROMEX_ST_END;
__fallthrough;
case PROMEX_ST_END:
se_fl_set(appctx->sedesc, SE_FL_EOS);
}
out:
htx_to_buf(res_htx, &res->buf);
/* eat the whole request */
if (co_data(req)) {
req_htx = htx_from_buf(&req->buf);
co_htx_skip(req, req_htx, co_data(req));
}
return;
error:
se_fl_set(appctx->sedesc, SE_FL_ERROR);
goto out;
}
struct applet promex_applet = {
.obj_type = OBJ_TYPE_APPLET,
.name = "<PROMEX>", /* used for logging */
.init = promex_appctx_init,
.fct = promex_appctx_handle_io,
};
static enum act_parse_ret service_parse_prometheus_exporter(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
/* Prometheus exporter service is only available on "http-request" rulesets */
if (rule->from != ACT_F_HTTP_REQ) {
memprintf(err, "Prometheus exporter service only available on 'http-request' rulesets");
return ACT_RET_PRS_ERR;
}
/* Add applet pointer in the rule. */
rule->applet = promex_applet;
return ACT_RET_PRS_OK;
}
static void promex_register_build_options(void)
{
char *ptr = NULL;
memprintf(&ptr, "Built with the Prometheus exporter as a service");
hap_register_build_opts(ptr, 1);
}
static struct action_kw_list service_actions = { ILH, {
{ "prometheus-exporter", service_parse_prometheus_exporter },
{ /* END */ }
}};
INITCALL1(STG_REGISTER, service_keywords_register, &service_actions);
INITCALL0(STG_REGISTER, promex_register_build_options);
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