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P.Péter
Asked: 2017-05-13 00:23:00 +0800 CST

Zabbix not detecting free swap space in linux container (LXC)

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I have an LXC container that has 4GB of swap, most of which is free:

# swapon -s
Filename                                Type            Size    Used    Priority
none                                    virtual         4096000 97004   0

However, Zabbix (2.2.5, zabbix-agentd 2.2.7) reports total swap space (and hence free swap space) as zero, and thus reports a problem.

How can I configure Zabbix to recognize the available swap space? Alternatively: is there a newer version of zabbix-agent that does have this problem?

zabbix

1 Answers

  1. Use official Zabbix repo - I see Zabbix 3.2 for Wheezy there http://repo.zabbix.com/zabbix/3.2/debian/dists/wheezy/

    IMHO deploying of Zabbix agent into container is not a good practice. In the theory you can have a thousands containers per host. I prefer to use metrics from the host level. In the theory use https://github.com/monitoringartist/zabbix-docker-monitoring and then you should to be able to obtain container cgroup swap metrics:

    docker.mem[cid,total_swap] - total container swap size
docker.mem[cid,swap]       - current container swap usage

    Cgroup memory doc: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Resource_Management_Guide/sec-memory.html

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