Rework statistic collection to be per repository and add metric output option

Many statistic values are now accounted by repository via repo_stat_inc()
At end of the run sum_stats() accumulates these stats per TAL and globally.
The new output file metrics is written when the -m output flag is specified.
The metrics file is written in OpenMetrics format (with a few tweaks to
allow node_exporter to parse the file as well). The ometric code is a copy
from bgpctl(8) and should be kept in sync.
OK tb@

1 files changed, 53 insertions, 0 deletions

diff --git a/usr.sbin/rpki-client/ometric.h b/usr.sbin/rpki-client/ometric.h
new file mode 100644
index 00000000000..f7b140b9b8c
--- /dev/null
+++ b/usr.sbin/rpki-client/ometric.h
@@ -0,0 +1,53 @@
+/*	$OpenBSD: ometric.h,v 1.1 2022/12/15 12:02:29 claudio Exp $ */
+
+/*
+ * Copyright (c) 2022 Claudio Jeker <claudio@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+enum ometric_type {
+	OMT_UNKNOWN,
+	OMT_GAUGE,
+	OMT_COUNTER,
+	OMT_STATESET,
+	OMT_HISTOGRAM,
+	OMT_SUMMARY,
+	OMT_INFO,
+};
+
+struct ometric;
+struct olabels;
+
+struct ometric	*ometric_new(enum ometric_type, const char *, const char *);
+struct ometric	*ometric_new_state(const char * const *, size_t, const char *,
+		    const char *);
+void		 ometric_free_all(void);
+struct olabels	*olabels_new(const char * const *, const char **);
+void		 olabels_free(struct olabels *);
+
+int		 ometric_output_all(FILE *);
+
+/* functions to set gauge and counter metrics */
+void	ometric_set_int(struct ometric *, uint64_t, struct olabels *);
+void	ometric_set_float(struct ometric *, double, struct olabels *);
+void	ometric_set_timespec(struct ometric *, const struct timespec *,
+	    struct olabels *);
+void	ometric_set_info(struct ometric *, const char **, const char **,
+	    struct olabels *); 
+void	ometric_set_state(struct ometric *, const char *, struct olabels *); 
+void	ometric_set_int_with_labels(struct ometric *, uint64_t, const char **,
+	    const char **, struct olabels *);
+void	ometric_set_timespec_with_labels(struct ometric *, struct timespec *,
+	    const char **, const char **, struct olabels *);
+#define OKV(...)		(const char *[]){ __VA_ARGS__, NULL }