Skip to main content

heartbeat won't start zope

Today I was installing a web cluster with the usual heartbeat/drbd stuff. The customer also needs zope because a part of the web site requires it, so I went and built a fresh rpm of it (link to zope rpm).
I then added zope to the haresources file, only to find out that heartbeat will cowardly refuse to start it!

When heartbeat starts to acquire resources it checks the status first by running resource status.
The problem is that the zope rc script prints 'not running' when it cannot find any zope instance running and heartbeat resource manager greps the zope status output for [Rr]unning, to decide whether it must start zope or it is already started for whatever reason.

The solution should be already in heartbeat cvs for some time now and was proposed by Lars Ellemberg of the drbd project. See this link for details:
http://lists.linux-ha.org/pipermail/linux-ha/2004-June/011154.html

Comments

Popular posts from this blog

Indexing Apache access logs with ELK (Elasticsearch+Logstash+Kibana)

Who said that grepping Apache logs has to be boring?

The truth is that, as Enteprise applications move to the browser too, Apache access logs are a gold mine, it does not matter what your role is: developer, support or sysadmin. If you are not mining them you are most likely missing out a ton of information and, probably, making the wrong decisions.
ELK (Elasticsearch, Logstash, Kibana) is a terrific, Open Source stack for visually analyzing Apache (or nginx) logs (but also any other timestamped data).

From 0 to ZFS replication in 5m with syncoid

The ZFS filesystem has many features that once you try them you can never go back. One of the lesser known is probably the support for replicating a zfs filesystem by sending the changes over the network with zfs send/receive.
Technically the filesystem changes don't even need to be sent over a network: you could as well dump them on a removable disk, then receive  from the same removable disk.

A not so short guide to ZFS on Linux

Updated Oct 16 2013: shadow copies, memory settings and links for further learning.
Updated Nov 15 2013: shadow copies example, samba tuning.

Unless you've been living under a rock you should have by now heard many stories about how awesome ZFS is and the many ways it can help with saving your bacon.

The downside is that ZFS is not available (natively) for Linux because the CDDL license under which it is released is incompatible with the GPL. Assuming you are not interested in converting to one of the many Illumos distributions or FreeBSD this guide might serve you as a starting point if you are attracted  by ZFS features but are reluctant to try it out on production systems.

Basically in this post I note down both the tought process and the actual commands for implementing a fileserver for a small office. The fileserver will run as a virtual machine in a large ESXi host and use ZFS as the filesystem for shared data.