Bug 1250073

Summary: redis fails to start when db is 0 bytes
Product: Red Hat Enterprise Linux 7 Reporter: Jan Kurik <jkurik>
Component: resource-agentsAssignee: Fabio Massimo Di Nitto <fdinitto>
Status: CLOSED ERRATA QA Contact: Asaf Hirshberg <ahirshbe>
Severity: urgent Docs Contact:
Priority: urgent    
Version: 7.1CC: agk, ahirshbe, cfeist, cluster-maint, djansa, fdinitto, jherrman, mjuricek, oblaut, tlavigne
Target Milestone: rcKeywords: ZStream
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: resource-agents-3.9.5-40.el7_1.7 Doc Type: Bug Fix
Doc Text:
When a cluster node fails, the /var/lib/redis/dump.rdb database file in some cases changes its size to 0 bytes. Previously, when this happened, the Redis Open Clustering Framework (OCF) resource agent did not start correctly. This update ensures that in the described situation, Redis automatically clears the corrupted database file and resynchronizes the remaining Redis instances in the cluster. As a result, Redis starts as expected.
 Story Points: ---
Clone Of: 1231032 Environment:
Last Closed: 2015-09-15 09:38:00 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1231032    
Bug Blocks:    
Attachments:
Description Flags
cat /var/log | grep redis
none
redis.log
none
redis.log none

Description Jan Kurik 2015-08-04 13:00:39 UTC 
This bug has been copied from bug #1231032 and has been proposed
to be backported to 7.1 z-stream (EUS).
Comment 5 Asaf Hirshberg 2015-08-12 09:21:09 UTC 
Created attachment 1061889 [details]
cat /var/log | grep redis
Comment 9 Asaf Hirshberg 2015-08-26 10:57:46 UTC 
Verified,


[root@overcloud-controller-2 ~]# rpm -qa |grep resource
resource-agents-3.9.5-40.el7_1.7.x86_64

1. rm /var/lib/redis/dump.rdb && touch /var/lib/redis/dump.rdb
2. Verify the redis agent successfully starts on that node.

[root@overcloud-controller-2 ~]# pcs status
Cluster name: tripleo_cluster
....
Master/Slave Set: redis-master [redis]
     Masters: [ overcloud-controller-0 ]
     Slaves: [ overcloud-controller-1 overcloud-controller-2 ]
....

redis logs attached
Comment 10 Asaf Hirshberg 2015-08-26 10:58:47 UTC 
Created attachment 1067222 [details]
redis.log
Comment 11 Asaf Hirshberg 2015-08-26 11:00:07 UTC 
Created attachment 1067225 [details]
redis.log
Comment 14 errata-xmlrpc 2015-09-15 09:38:00 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-1791.html