1 files changed, 21 insertions, 0 deletions
diff --git a/health/health.d/tcp_orphans.conf b/health/health.d/tcp_orphans.conf
new file mode 100644
index 0000000..280d659
--- /dev/null
+++ b/health/health.d/tcp_orphans.conf
@@ -0,0 +1,21 @@
+
+#
+# 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
+      os: linux
+   hosts: *
+    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
+    info: the percentage of orphan IPv4 TCP sockets over the max allowed (this may lead to too-many-orphans errors)
+      to: sysadmin