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http://git.haproxy.org/git/haproxy.git/
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9425ed488f
This patch solves the problem reported in github issue #1204, where the OpenTracing filter cannot communicate with the selected tracer if HAProxy is run in daemon mode. This commit also solves github issue #1274, where the problem manifests itself when using the 'chroot' keyword in the HAProxy configuration. This is solved so that the initialization of the OpenTracing plugin is split into two operations, first the plugin (dynamic library) is loaded before switching the HAProxy to daemon mode (or chroot) and then the tracer thread is started. This means that nothing is retrieved from the file system in runtime. After applying this commit, opentracing C wrapper version 1.1.0 should be used because the earlier version does not have separated initialization functions. This resolves GitHub issues #1204 and #1274.
87 lines
5.0 KiB
C
87 lines
5.0 KiB
C
/***
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* Copyright 2020 HAProxy Technologies
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*
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* This file is part of the HAProxy OpenTracing filter.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef _OPENTRACING_OT_H_
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#define _OPENTRACING_OT_H_
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#include <opentracing-c-wrapper/include.h>
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#define FLT_OT_VSET(p,t,v) \
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do { (p)->type = otc_value_##t; (p)->value.t##_value = (v); } while (0)
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#define FLT_OT_DBG_TEXT_MAP(a) \
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FLT_OT_DBG(3, "%p:{ %p %p %zu/%zu %hhu }", \
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(a), (a)->key, (a)->value, (a)->count, (a)->size, (a)->is_dynamic)
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#define FLT_OT_DBG_TEXT_CARRIER(a,f) \
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FLT_OT_DBG(3, "%p:{ { %p %p %zu/%zu %hhu } %p }", \
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(a), (a)->text_map.key, (a)->text_map.value, (a)->text_map.count, \
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(a)->text_map.size, (a)->text_map.is_dynamic, (a)->f)
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#define FLT_OT_DBG_CUSTOM_CARRIER(a,f) \
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FLT_OT_DBG(3, "%p:{ { %p %zu %hhu } %p }", \
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(a), (a)->binary_data.data, (a)->binary_data.size, \
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(a)->binary_data.is_dynamic, (a)->f)
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#define FLT_OT_DBG_SPAN_CONTEXT(a) \
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FLT_OT_DBG(3, "%p:{ %" PRId64 " %p %p }", (a), (a)->idx, (a)->span, (a)->destroy)
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#ifndef DEBUG_OT
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# define ot_debug() while (0)
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# define ot_text_map_show(...) while (0)
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#else
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void ot_text_map_show(const struct otc_text_map *text_map);
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void ot_debug(void);
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#endif
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int ot_init(struct otc_tracer **tracer, const char *plugin, char **err);
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int ot_start(struct otc_tracer *tracer, const char *cfgbuf, char **err);
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struct otc_span *ot_span_init(struct otc_tracer *tracer, const char *operation_name, const struct timespec *ts_steady, const struct timespec *ts_system, int ref_type, int ref_ctx_idx, const struct otc_span *ref_span, const struct otc_tag *tags, int num_tags, char **err);
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int ot_span_tag(struct otc_span *span, const struct otc_tag *tags, int num_tags);
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int ot_span_log(struct otc_span *span, const struct otc_log_field *log_fields, int num_fields);
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int ot_span_set_baggage(struct otc_span *span, const struct otc_text_map *baggage);
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struct otc_span_context *ot_inject_http_headers(struct otc_tracer *tracer, const struct otc_span *span, struct otc_http_headers_writer *carrier, char **err);
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struct otc_span_context *ot_extract_http_headers(struct otc_tracer *tracer, struct otc_http_headers_reader *carrier, const struct otc_text_map *text_map, char **err);
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void ot_span_finish(struct otc_span **span, const struct timespec *ts_finish, const struct timespec *log_ts, const char *log_key, const char *log_value, ...);
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void ot_close(struct otc_tracer **tracer);
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/* Unused code. */
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struct otc_span *ot_span_init_va(struct otc_tracer *tracer, const char *operation_name, const struct timespec *ts_steady, const struct timespec *ts_system, int ref_type, int ref_ctx_idx, const struct otc_span *ref_span, char **err, const char *tag_key, const char *tag_value, ...);
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int ot_span_tag_va(struct otc_span *span, const char *key, int type, ...);
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int ot_span_log_va(struct otc_span *span, const char *key, const char *value, ...);
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int ot_span_log_fmt(struct otc_span *span, const char *key, const char *format, ...) __attribute__ ((format(printf, 3, 4)));
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int ot_span_set_baggage_va(struct otc_span *span, const char *key, const char *value, ...);
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struct otc_text_map *ot_span_baggage_va(const struct otc_span *span, const char *key, ...);
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struct otc_span_context *ot_inject_text_map(struct otc_tracer *tracer, const struct otc_span *span, struct otc_text_map_writer *carrier);
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struct otc_span_context *ot_inject_binary(struct otc_tracer *tracer, const struct otc_span *span, struct otc_custom_carrier_writer *carrier);
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struct otc_span_context *ot_extract_text_map(struct otc_tracer *tracer, struct otc_text_map_reader *carrier, const struct otc_text_map *text_map);
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struct otc_span_context *ot_extract_binary(struct otc_tracer *tracer, struct otc_custom_carrier_reader *carrier, const struct otc_binary_data *binary_data);
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#endif /* _OPENTRACING_OT_H_ */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*
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* vi: noexpandtab shiftwidth=8 tabstop=8
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*/
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