/* * 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 * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 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 , 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 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 . It is its #HELP and #TYPE strings. It * returns 1 on success. Otherwise, if length exceeds , 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 . 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 length exceeds , 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 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 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 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 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 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 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 is full and * -1 in case of any error. * Uses as a pointer to the current proxy and /
  • * 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, channel_htx_recv_max(sc_ic(appctx_sc(appctx)), htx) + 1); 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 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, 0); 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, 0); 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, sizeof(struct htx_blk) + 1); 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 = "", /* 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);