1 files changed, 22 insertions, 0 deletions
diff --git a/src/health/health.d/tcp_orphans.conf b/src/health/health.d/tcp_orphans.conf
new file mode 100644
index 000000000..7b2d95edb
--- /dev/null
+++ b/src/health/health.d/tcp_orphans.conf
@@ -0,0 +1,22 @@
+# check
+# http://blog.tsunanet.net/2011/03/out-of-socket-memory.html
+#
+# The kernel may penalize orphans by 2x or even 4x
+# so we alarm warning at 25% and critical at 50%
+#
+
+      alarm: tcp_orphans
+         on: ipv4.sockstat_tcp_sockets
+      class: Errors
+       type: System
+  component: Network
+host labels: _os=linux
+       calc: ${orphan} * 100 / ${tcp_max_orphans}
+      units: %
+      every: 10s
+       warn: $this > (($status >= $WARNING ) ? ( 20 ) : ( 25 ))
+       crit: $this > (($status == $CRITICAL) ? ( 25 ) : ( 50 ))
+      delay: up 0 down 5m multiplier 1.5 max 1h
+    summary: System TCP orphan sockets utilization
+       info: Orphan IPv4 TCP sockets utilization
+         to: silent