varnish: monitor VSM usage stats, made available in V4

diff --git a/src/collectd.conf.in b/src/collectd.conf.in
index 80e1d5c..0583c00 100644 (file)
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -1179,6 +1179,7 @@
 #      CollectUptime false
 #      CollectVCL false
 #      CollectWorkers false
+#      CollectVSM false           # Varnish 4 only
 #   </Instance>
 #</Plugin>
 

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index ac0ff2a..1ba8500 100644 (file)
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -6322,6 +6322,7 @@ Synopsis:
      CollectSM          false
      CollectTotals      false
      CollectWorkers     false
+     CollectVSM         false
    </Instance>
  </Plugin>
 
@@ -6431,6 +6432,11 @@ Number of total (available + discarded) VCL (config files). False by default.
 
 Collect statistics about worker threads. False by default.
 
+=item B<CollectVSM> B<true>|B<false>
+
+Collect statistics about Varnish's shared memory usage (used by the logging and
+statisticss subsystems). False by default.
+
 =back
 
 =head2 Plugin C<virt>

diff --git a/src/varnish.c b/src/varnish.c
index 517258e..38efcdc 100644 (file)
--- a/src/varnish.c
+++ b/src/varnish.c
@@ -78,6 +78,9 @@ struct user_config_s {
 #endif
        _Bool collect_vcl;
        _Bool collect_workers;
+#if HAVE_VARNISH_V4
+       _Bool collect_vsm;
+#endif
 };
 typedef struct user_config_s user_config_t; /* }}} */
 
@@ -561,6 +564,23 @@ static void varnish_monitor (const user_config_t *conf, /* {{{ */
 #endif
 #endif
        }
+
+#if HAVE_VARNISH_V4
+       if (conf->collect_vsm)
+       {
+               /* Free VSM space */
+               varnish_submit_gauge (conf->instance, "vsm", "bytes", "free",              stats->vsm_free);
+               /* Used VSM space */
+               varnish_submit_gauge (conf->instance, "vsm", "bytes", "used",              stats->vsm_used);
+               /* Cooling VSM space */
+               varnish_submit_gauge (conf->instance, "vsm", "bytes", "cooling",           stats->vsm_cooling);
+               /* Overflow VSM space */
+               varnish_submit_gauge (conf->instance, "vsm", "bytes", "overflow",          stats->vsm_overflow);
+               /* Total overflowed VSM space */
+               varnish_submit_derive (conf->instance, "vsm", "total_bytes", "overflowed", stats->vsm_overflowed);
+       }
+#endif
+
 } /* }}} void varnish_monitor */
 
 #if HAVE_VARNISH_V3 || HAVE_VARNISH_V4
@@ -688,6 +708,9 @@ static int varnish_config_apply_default (user_config_t *conf) /* {{{ */
 #endif
        conf->collect_vcl         = 0;
        conf->collect_workers     = 0;
+#if HAVE_VARNISH_V4
+       conf->collect_vsm         = 0;
+#endif
 
        return (0);
 } /* }}} int varnish_config_apply_default */
@@ -815,6 +838,10 @@ static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
                        cf_util_get_boolean (child, &conf->collect_vcl);
                else if (strcasecmp ("CollectWorkers", child->key) == 0)
                        cf_util_get_boolean (child, &conf->collect_workers);
+#if HAVE_VARNISH_V4
+               else if (strcasecmp ("CollectVSM", child->key) == 0)
+                       cf_util_get_boolean (child, &conf->collect_vsm);
+#endif
                else
                {
                        WARNING ("Varnish plugin: Ignoring unknown "
@@ -853,7 +880,11 @@ static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
                        && !conf->collect_uptime
 #endif
                        && !conf->collect_vcl
-                       && !conf->collect_workers)
+                       && !conf->collect_workers
+#if HAVE_VARNISH_V4
+                       && !conf->collect_vsm
+#endif
+       )
        {
                WARNING ("Varnish plugin: No metric has been configured for "
                                "instance \"%s\". Disabling this instance.",