Freeze Break Request: Add collectd monitoring for memcached

[Ralph Bean]

Hi all-

Memcached has been locking up on us lately.  If I remember correctly
it was Saturday morning, then again Monday morning, and it did it
again today (which manifested in a badges.fedoraproject.org outage for
users).

We currently don't have any collectd monitoring directly on memcached.
Here's an ansible patch that should add it.  Since we're in freeze,
this would need two +1s in order to be able to be applied.

If, for some reason it was broken or hosed up, I could revert it by
removing the /etc/collectd.d/memcached.conf file on both memcached
servers and subsequently restarting the memcached daemon.

Patch follows:

From 6535e0344f4db5b0eb00aeb37007c92f471d7224 Mon Sep 17 00:00:00 2001
From: Ralph Bean <rbean at redhat.com>
Date: Wed, 19 Nov 2014 14:37:50 +0000
Subject: [PATCH] Add collectd monitoring for the memcached daemon.

---
 playbooks/groups/memcached.yml                |    1 +
 roles/collectd/memcached/files/memcached.conf |    6 ++++++
 roles/collectd/memcached/tasks/main.yml       |    8 ++++++++
 3 files changed, 15 insertions(+), 0 deletions(-)
 create mode 100644 roles/collectd/memcached/files/memcached.conf
 create mode 100644 roles/collectd/memcached/tasks/main.yml

diff --git a/playbooks/groups/memcached.yml b/playbooks/groups/memcached.yml
index 5fc955b..90d52b0 100644
--- a/playbooks/groups/memcached.yml
+++ b/playbooks/groups/memcached.yml
@@ -31,6 +31,7 @@
   - hosts
   - fas_client
   - collectd/base
+  - collectd/memcached
   - sudo
   - memcached
 
diff --git a/roles/collectd/memcached/files/memcached.conf b/roles/collectd/memcached/files/memcached.conf
new file mode 100644
index 0000000..d59815b
--- /dev/null
+++ b/roles/collectd/memcached/files/memcached.conf
@@ -0,0 +1,6 @@
+LoadPlugin memcached
+
+<Plugin memcached>
+    Host "localhost"
+    Port "11211"
+</Plugin>
diff --git a/roles/collectd/memcached/tasks/main.yml b/roles/collectd/memcached/tasks/main.yml
new file mode 100644
index 0000000..3023af7
--- /dev/null
+++ b/roles/collectd/memcached/tasks/main.yml
@@ -0,0 +1,8 @@
+---
+
+- name: Copy in the memcached collectd config
+  copy: src=memcached.conf dest=/etc/collectd.d/memcached.conf
+  tags:
+  - collectd
+  - memcached
+  notify: restart collectd
-- 
1.7.2.1

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