New logging layer (#16357)

* cleanup of logging - wip

* first working iteration

* add errno annotator

* replace old logging functions with netdata_logger()

* cleanup

* update error_limit

* fix remanining error_limit references

* work on fatal()

* started working on structured logs

* full cleanup

* default logging to files; fix all plugins initialization

* fix formatting of numbers

* cleanup and reorg

* fix coverity issues

* cleanup obsolete code

* fix formatting of numbers

* fix log rotation

* fix for older systems

* add detection of systemd journal via stderr

* finished on access.log

* remove left-over transport

* do not add empty fields to the logs

* journal get compact uuids; X-Transaction-ID header is added in web responses

* allow compiling on systems without memfd sealing

* added libnetdata/uuid directory

* move datetime formatters to libnetdata

* add missing files

* link the makefiles in libnetdata

* added uuid_parse_flexi() to parse UUIDs with and without hyphens; the web server now read X-Transaction-ID and uses it for functions and web responses

* added stream receiver, sender, proc plugin and pluginsd log stack

* iso8601 advanced usage; line_splitter module in libnetdata; code cleanup

* add message ids to streaming inbound and outbound connections

* cleanup line_splitter between lines to avoid logging garbage; when killing children, kill them with SIGABRT if internal checks is enabled

* send SIGABRT to external plugins only if we are not shutting down

* fix cross cleanup in pluginsd parser

* fatal when there is a stack error in logs

* compile netdata with -fexceptions

* do not kill external plugins with SIGABRT

* metasync info logs to debug level

* added severity to logs

* added json output; added options per log output; added documentation; fixed issues mentioned

* allow memfd only on linux

* moved journal low level functions to journal.c/h

* move health logs to daemon.log with proper priorities

* fixed a couple of bugs; health log in journal

* updated docs

* systemd-cat-native command to push structured logs to journal from the command line

* fix makefiles

* restored NETDATA_LOG_SEVERITY_LEVEL

* fix makefiles

* systemd-cat-native can also work as the logger of Netdata scripts

* do not require a socket to systemd-journal to log-as-netdata

* alarm notify logs in native format

* properly compare log ids

* fatals log alerts; alarm-notify.sh working

* fix overflow warning

* alarm-notify.sh now logs the request (command line)

* anotate external plugins logs with the function cmd they run

* added context, component and type to alarm-notify.sh; shell sanitization removes control character and characters that may be expanded by bash

* reformatted alarm-notify logs

* unify cgroup-network-helper.sh

* added quotes around params

* charts.d.plugin switched logging to journal native

* quotes for logfmt

* unify the status codes of streaming receivers and senders

* alarm-notify: dont log anything, if there is nothing to do

* all external plugins log to stderr when running outside netdata; alarm-notify now shows an error when notifications menthod are needed but are not available

* migrate cgroup-name.sh to new logging

* systemd-cat-native now supports messages with newlines

* socket.c logs use priority

* cleanup log field types

* inherit the systemd set INVOCATION_ID if found

* allow systemd-cat-native to send messages to a systemd-journal-remote URL

* log2journal command that can convert structured logs to journal export format

* various fixes and documentation of log2journal

* updated log2journal docs

* updated log2journal docs

* updated documentation of fields

* allow compiling without libcurl

* do not use socket as format string

* added version information to newly added tools

* updated documentation and help messages

* fix the namespace socket path

* print errno with error

* do not timeout

* updated docs

* updated docs

* updated docs

* log2journal updated docs and params

* when talking to a remote journal, systemd-cat-native batches the messages

* enable lz4 compression for systemd-cat-native when sending messages to a systemd-journal-remote

* Revert "enable lz4 compression for systemd-cat-native when sending messages to a systemd-journal-remote"

This reverts commit b079d53c11f6687cd64d804fdd7b24c0492bf245.

* note about uncompressed traffic

* log2journal: code reorg and cleanup to make modular

* finished rewriting log2journal

* more comments

* rewriting rules support

* increased limits

* updated docs

* updated docs

* fix old log call

* use journal only when stderr is connected to journal

* update netdata.spec for libcurl, libpcre2 and log2journal

* pcre2-devel

* do not require pcre2 in centos < 8, amazonlinux < 2023, open suse

* log2journal only on systems pcre2 is available

* ignore log2journal in .gitignore

* avoid log2journal on centos 7, amazonlinux 2 and opensuse

* add pcre2-8 to static build

* undo last commit

* Bundle to static

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>

* Add build deps for deb packages

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>

* Add dependencies; build from source

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>

* Test build for amazon linux and centos expect to fail for suse

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>

* fix minor oversight

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>

* Reorg code

* Add the install from source (deps) as a TODO
* Not enable the build on suse ecosystem

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>

---------

Signed-off-by: Tasos Katsoulas <tasos@netdata.cloud>
Co-authored-by: Tasos Katsoulas <tasos@netdata.cloud>

1 files changed, 29 insertions, 0 deletions

diff --git a/libnetdata/uuid/uuid.h b/libnetdata/uuid/uuid.h
new file mode 100644
index 0000000000..5676468460
--- /dev/null
+++ b/libnetdata/uuid/uuid.h
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_UUID_H
+#define NETDATA_UUID_H
+
+UUID_DEFINE(streaming_from_child_msgid, 0xed,0x4c,0xdb, 0x8f, 0x1b, 0xeb, 0x4a, 0xd3, 0xb5, 0x7c, 0xb3, 0xca, 0xe2, 0xd1, 0x62, 0xfa);
+UUID_DEFINE(streaming_to_parent_msgid, 0x6e, 0x2e, 0x38, 0x39, 0x06, 0x76, 0x48, 0x96, 0x8b, 0x64, 0x60, 0x45, 0xdb, 0xf2, 0x8d, 0x66);
+UUID_DEFINE(health_alert_transition_msgid, 0x9c, 0xe0, 0xcb, 0x58, 0xab, 0x8b, 0x44, 0xdf, 0x82, 0xc4, 0xbf, 0x1a, 0xd9, 0xee, 0x22, 0xde);
+
+// this is also defined in alarm-notify.sh.in
+UUID_DEFINE(health_alert_notification_msgid, 0x6d, 0xb0, 0x01, 0x8e, 0x83, 0xe3, 0x43, 0x20, 0xae, 0x2a, 0x65, 0x9d, 0x78, 0x01, 0x9f, 0xb7);
+
+#define UUID_COMPACT_STR_LEN 33
+void uuid_unparse_lower_compact(const uuid_t uuid, char *out);
+int uuid_parse_compact(const char *in, uuid_t uuid);
+int uuid_parse_flexi(const char *in, uuid_t uuid);
+
+static inline int uuid_memcmp(const uuid_t *uu1, const uuid_t *uu2) {
+    return memcmp(uu1, uu2, sizeof(uuid_t));
+}
+
+static inline int hex_char_to_int(char c) {
+    if (c >= '0' && c <= '9') return c - '0';
+    if (c >= 'a' && c <= 'f') return c - 'a' + 10;
+    if (c >= 'A' && c <= 'F') return c - 'A' + 10;
+    return -1; // Invalid hexadecimal character
+}
+
+#endif //NETDATA_UUID_H