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-rw-r--r--ctdb/utils/pmda/pmda_ctdb.c559
1 files changed, 559 insertions, 0 deletions
diff --git a/ctdb/utils/pmda/pmda_ctdb.c b/ctdb/utils/pmda/pmda_ctdb.c
new file mode 100644
index 0000000..4f7933d
--- /dev/null
+++ b/ctdb/utils/pmda/pmda_ctdb.c
@@ -0,0 +1,559 @@
+/*
+ * CTDB Performance Metrics Domain Agent (PMDA) for Performance Co-Pilot (PCP)
+ *
+ * Copyright (c) 1995,2004 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2011 David Disseldorp
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "replace.h"
+#include "system/network.h"
+
+#include <talloc.h>
+#include <tevent.h>
+#include <tdb.h>
+
+#include "lib/util/time.h"
+#include "lib/util/blocking.h"
+
+#include "client/client.h"
+#include "client/client_sync.h"
+
+#include <pcp/pmapi.h>
+#include <pcp/pmda.h>
+
+#ifdef HAVE___PMID_INT
+#include <pcp/impl.h>
+
+#define pmID_cluster(id) id->cluster
+#define pmID_item(id) id->item
+#define pmGetProgname() pmProgname
+#define pmSetProgname(a) __pmSetProgname(a)
+#endif
+
+#include "domain.h"
+
+/*
+ * CTDB PMDA
+ *
+ * This PMDA connects to the locally running ctdbd daemon and pulls
+ * statistics for export via PCP. The ctdbd Unix domain socket path can be
+ * specified with the CTDB_SOCKET environment variable, otherwise the default
+ * path is used.
+ */
+
+/*
+ * All metrics supported in this PMDA - one table entry for each.
+ * The 4th field specifies the serial number of the instance domain
+ * for the metric, and must be either PM_INDOM_NULL (denoting a
+ * metric that only ever has a single value), or the serial number
+ * of one of the instance domains declared in the instance domain table
+ * (i.e. in indomtab, above).
+ */
+static pmdaMetric metrictab[] = {
+ /* num_clients */
+ { NULL, { PMDA_PMID(0,0), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* frozen */
+ { NULL, { PMDA_PMID(0,1), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* recovering */
+ { NULL, { PMDA_PMID(0,2), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* client_packets_sent */
+ { NULL, { PMDA_PMID(0,3), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* client_packets_recv */
+ { NULL, { PMDA_PMID(0,4), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* node_packets_sent */
+ { NULL, { PMDA_PMID(0,5), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* node_packets_recv */
+ { NULL, { PMDA_PMID(0,6), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* keepalive_packets_sent */
+ { NULL, { PMDA_PMID(0,7), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* keepalive_packets_recv */
+ { NULL, { PMDA_PMID(0,8), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_call */
+ { NULL, { PMDA_PMID(1,0), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* reply_call */
+ { NULL, { PMDA_PMID(1,1), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_dmaster */
+ { NULL, { PMDA_PMID(1,2), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* reply_dmaster */
+ { NULL, { PMDA_PMID(1,3), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* reply_error */
+ { NULL, { PMDA_PMID(1,4), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_message */
+ { NULL, { PMDA_PMID(1,5), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_control */
+ { NULL, { PMDA_PMID(1,6), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* reply_control */
+ { NULL, { PMDA_PMID(1,7), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_call */
+ { NULL, { PMDA_PMID(2,0), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_message */
+ { NULL, { PMDA_PMID(2,1), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* req_control */
+ { NULL, { PMDA_PMID(2,2), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* call */
+ { NULL, { PMDA_PMID(3,0), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,0) }, },
+ /* control */
+ { NULL, { PMDA_PMID(3,1), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,0) }, },
+ /* traverse */
+ { NULL, { PMDA_PMID(3,2), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,0) }, },
+ /* total_calls */
+ { NULL, { PMDA_PMID(0,9), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* pending_calls */
+ { NULL, { PMDA_PMID(0,10), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* locks.num_calls */
+ { NULL, { PMDA_PMID(0,11), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* locks.num_pending */
+ { NULL, { PMDA_PMID(0,12), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* childwrite_calls */
+ { NULL, { PMDA_PMID(0,13), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_COUNTER,
+ PMDA_PMUNITS(0,0,1,0,0,PM_COUNT_ONE) }, },
+ /* pending_childwrite_calls */
+ { NULL, { PMDA_PMID(0,14), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* memory_used */
+ { NULL, { PMDA_PMID(0,15), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(1,0,0,PM_SPACE_BYTE,0,0) }, },
+ /* max_hop_count */
+ { NULL, { PMDA_PMID(0,16), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+ /* reclock.ctdbd.max */
+ { NULL, { PMDA_PMID(0,17), PM_TYPE_DOUBLE, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,1,0,0,PM_TIME_SEC,0) }, },
+ /* reclock.recd.max */
+ { NULL, { PMDA_PMID(0,18), PM_TYPE_DOUBLE, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,1,0,0,PM_TIME_SEC,0) }, },
+ /* call_latency.max */
+ { NULL, { PMDA_PMID(0,19), PM_TYPE_DOUBLE, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,1,0,0,PM_TIME_SEC,0) }, },
+ /* locks.latency.max */
+ { NULL, { PMDA_PMID(0,20), PM_TYPE_DOUBLE, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,1,0,0,PM_TIME_SEC,0) }, },
+ /* childwrite_latency.max */
+ { NULL, { PMDA_PMID(0,21), PM_TYPE_DOUBLE, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,1,0,0,PM_TIME_SEC,0) }, },
+ /* num_recoveries */
+ { NULL, { PMDA_PMID(0,22), PM_TYPE_U32, PM_INDOM_NULL, PM_SEM_INSTANT,
+ PMDA_PMUNITS(0,0,0,0,0,0) }, },
+};
+
+static struct tevent_context *ev;
+static struct ctdb_client_context *client;
+static struct ctdb_statistics *stats;
+
+static void
+pmda_ctdb_disconnected(void *args)
+{
+ fprintf(stderr, "ctdbd unreachable\n");
+ TALLOC_FREE(client);
+}
+
+
+static int
+pmda_ctdb_daemon_connect(void)
+{
+ const char *socket_name;
+ int ret;
+
+ ev = tevent_context_init(NULL);
+ if (ev == NULL) {
+ fprintf(stderr, "Failed to init event ctx\n");
+ return -1;
+ }
+
+ socket_name = getenv("CTDB_SOCKET");
+ if (socket_name == NULL) {
+ socket_name = CTDB_SOCKET;
+ }
+
+ ret = ctdb_client_init(ev, ev, socket_name, &client);
+ if (ret != 0) {
+ fprintf(stderr, "Failed to connect to ctdb daemon via %s\n",
+ socket_name);
+ goto err_ev;
+ }
+
+ ctdb_client_set_disconnect_callback(client, pmda_ctdb_disconnected,
+ NULL);
+
+ return 0;
+
+err_ev:
+ talloc_free(ev);
+ client = NULL;
+ return -1;
+}
+
+static void
+pmda_ctdb_daemon_disconnect(void)
+{
+ TALLOC_FREE(client);
+ talloc_free(ev);
+}
+
+static int
+fill_base(unsigned int item, pmAtomValue *atom)
+{
+ switch (item) {
+ case 0:
+ atom->ul = stats->num_clients;
+ break;
+ case 1:
+ atom->ul = stats->frozen;
+ break;
+ case 2:
+ atom->ul = stats->recovering;
+ break;
+ case 3:
+ atom->ul = stats->client_packets_sent;
+ break;
+ case 4:
+ atom->ul = stats->client_packets_recv;
+ break;
+ case 5:
+ atom->ul = stats->node_packets_sent;
+ break;
+ case 6:
+ atom->ul = stats->node_packets_recv;
+ break;
+ case 7:
+ atom->ul = stats->keepalive_packets_sent;
+ break;
+ case 8:
+ atom->ul = stats->keepalive_packets_recv;
+ break;
+ case 9:
+ atom->ul = stats->total_calls;
+ break;
+ case 10:
+ atom->ul = stats->pending_calls;
+ break;
+ case 11:
+ atom->ul = stats->locks.num_calls;
+ break;
+ case 12:
+ atom->ul = stats->locks.num_pending;
+ break;
+ case 13:
+ atom->ul = stats->childwrite_calls;
+ break;
+ case 14:
+ atom->ul = stats->pending_childwrite_calls;
+ break;
+ case 15:
+ atom->ul = stats->memory_used;
+ break;
+ case 16:
+ atom->ul = stats->max_hop_count;
+ break;
+ case 17:
+ atom->d = stats->reclock.ctdbd.max;
+ break;
+ case 18:
+ atom->d = stats->reclock.recd.max;
+ break;
+ case 19:
+ atom->d = stats->call_latency.max;
+ break;
+ case 20:
+ atom->d = stats->locks.latency.max;
+ break;
+ case 21:
+ atom->d = stats->childwrite_latency.max;
+ break;
+ case 22:
+ atom->ul = stats->num_recoveries;
+ break;
+ default:
+ return PM_ERR_PMID;
+ }
+
+ return 0;
+}
+
+static int
+fill_node(unsigned int item, pmAtomValue *atom)
+{
+ switch (item) {
+ case 0:
+ atom->ul = stats->node.req_call;
+ break;
+ case 1:
+ atom->ul = stats->node.reply_call;
+ break;
+ case 2:
+ atom->ul = stats->node.req_dmaster;
+ break;
+ case 3:
+ atom->ul = stats->node.reply_dmaster;
+ break;
+ case 4:
+ atom->ul = stats->node.reply_error;
+ break;
+ case 5:
+ atom->ul = stats->node.req_message;
+ break;
+ case 6:
+ atom->ul = stats->node.req_control;
+ break;
+ case 7:
+ atom->ul = stats->node.reply_control;
+ break;
+ default:
+ return PM_ERR_PMID;
+ }
+
+ return 0;
+}
+
+
+static int
+fill_client(unsigned int item, pmAtomValue *atom)
+{
+ switch (item) {
+ case 0:
+ atom->ul = stats->client.req_call;
+ break;
+ case 1:
+ atom->ul = stats->client.req_message;
+ break;
+ case 2:
+ atom->ul = stats->client.req_control;
+ break;
+ default:
+ return PM_ERR_PMID;
+ }
+
+ return 0;
+}
+
+static int
+fill_timeout(unsigned int item, pmAtomValue *atom)
+{
+ switch (item) {
+ case 0:
+ atom->ul = stats->timeouts.call;
+ break;
+ case 1:
+ atom->ul = stats->timeouts.control;
+ break;
+ case 2:
+ atom->ul = stats->timeouts.traverse;
+ break;
+ default:
+ return PM_ERR_PMID;
+ }
+
+ return 0;
+}
+
+/*
+ * callback provided to pmdaFetch
+ */
+static int
+pmda_ctdb_fetch_cb(pmdaMetric *mdesc, unsigned int inst, pmAtomValue *atom)
+{
+ int ret;
+#ifdef HAVE___PMID_INT
+ __pmID_int *id = (__pmID_int *)&(mdesc->m_desc.pmid);
+#else
+ pmID id = *(pmID *)&(mdesc->m_desc.pmid);
+#endif
+
+ if (inst != PM_IN_NULL) {
+ return PM_ERR_INST;
+ }
+
+ if (stats == NULL) {
+ fprintf(stderr, "stats not available\n");
+ ret = PM_ERR_VALUE;
+ goto err_out;
+ }
+
+
+ switch (pmID_cluster(id)) {
+ case 0:
+ ret = fill_base(pmID_item(id), atom);
+ if (ret) {
+ goto err_out;
+ }
+ break;
+ case 1:
+ ret = fill_node(pmID_item(id), atom);
+ if (ret) {
+ goto err_out;
+ }
+ break;
+ case 2:
+ ret = fill_client(pmID_item(id), atom);
+ if (ret) {
+ goto err_out;
+ }
+ break;
+ case 3:
+ ret = fill_timeout(pmID_item(id), atom);
+ if (ret) {
+ goto err_out;
+ }
+ break;
+ default:
+ return PM_ERR_PMID;
+ }
+
+ ret = 0;
+err_out:
+ return ret;
+}
+
+/*
+ * This routine is called once for each pmFetch(3) operation, so is a
+ * good place to do once-per-fetch functions, such as value caching or
+ * instance domain evaluation.
+ */
+static int
+pmda_ctdb_fetch(int numpmid, pmID pmidlist[], pmResult **resp, pmdaExt *pmda)
+{
+ int ret;
+
+ if (client == NULL) {
+ fprintf(stderr, "attempting reconnect to ctdbd\n");
+ ret = pmda_ctdb_daemon_connect();
+ if (ret < 0) {
+ fprintf(stderr, "reconnect failed\n");
+ return PM_ERR_VALUE;
+ }
+ }
+
+ ret = ctdb_ctrl_statistics(client, ev, client, CTDB_CURRENT_NODE,
+ tevent_timeval_current_ofs(1,0), &stats);
+ if (ret != 0) {
+ fprintf(stderr, "ctdb control for statistics failed, reconnecting\n");
+ pmda_ctdb_daemon_disconnect();
+ ret = PM_ERR_VALUE;
+ goto err_out;
+ }
+
+ ret = pmdaFetch(numpmid, pmidlist, resp, pmda);
+
+ talloc_free(stats);
+err_out:
+ return ret;
+}
+
+void pmda_ctdb_init(pmdaInterface *dp);
+
+/*
+ * Initialise the agent
+ */
+void
+pmda_ctdb_init(pmdaInterface *dp)
+{
+ if (dp->status != 0) {
+ return;
+ }
+
+ dp->version.two.fetch = pmda_ctdb_fetch;
+ pmdaSetFetchCallBack(dp, pmda_ctdb_fetch_cb);
+
+ pmdaInit(dp, NULL, 0, metrictab,
+ (sizeof(metrictab) / sizeof(metrictab[0])));
+}
+
+static char *
+helpfile(void)
+{
+ static char buf[MAXPATHLEN];
+
+ if (!buf[0]) {
+ snprintf(buf, sizeof(buf), "%s/ctdb/help",
+ pmGetConfig("PCP_PMDAS_DIR"));
+ }
+ return buf;
+}
+
+static void
+usage(void)
+{
+ fprintf(stderr, "Usage: %s [options]\n\n", pmGetProgname());
+ fputs("Options:\n"
+ " -d domain use domain (numeric) for metrics domain of PMDA\n"
+ " -l logfile write log into logfile rather than using default log name\n"
+ "\nExactly one of the following options may appear:\n"
+ " -i port expect PMCD to connect on given inet port (number or name)\n"
+ " -p expect PMCD to supply stdin/stdout (pipe)\n"
+ " -u socket expect PMCD to connect on given unix domain socket\n",
+ stderr);
+ exit(1);
+}
+
+/*
+ * Set up the agent if running as a daemon.
+ */
+int
+main(int argc, char **argv)
+{
+ int err = 0;
+ char log_file[] = "pmda_ctdb.log";
+ pmdaInterface dispatch;
+
+ pmSetProgname(argv[0]);
+
+ pmdaDaemon(&dispatch, PMDA_INTERFACE_2, argv[0], CTDB,
+ log_file, helpfile());
+
+ if (pmdaGetOpt(argc, argv, "d:i:l:pu:?", &dispatch, &err) != EOF) {
+ err++;
+ }
+
+ if (err) {
+ usage();
+ }
+
+ pmdaOpenLog(&dispatch);
+ pmda_ctdb_init(&dispatch);
+ pmdaConnect(&dispatch);
+ pmdaMain(&dispatch);
+
+ exit(0);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 12:52:46 +0000