Portal:Toolforge/Admin/Toolschecker
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This page is currently a draft. |
Toolschecker is a Flask application that runs various active checks on Toolforge and Cloud VPS infrastructure in response to HTTP requests. Each check is exposed as a separate URL on the checker.tools.wmflabs.org host. These URLs are monitored by Icinga for alerting purposes (see "checker.tools.wmflabs.org"). Some URLs are also monitored externally by Catchpoint.
Contents
Servers
- tools-checker-03.tools.eqiad.wmflabs
This list is defined in the toollabs::checker_hosts key in https://wikitech.wikimedia.org/wiki/Hiera:Tools and is used in configuring the ferm rules for Toolforge's flannel and Kubernetes etcd clusters.
Tools
Several tools are involved in the checks:
- toolschecker
- Crontab for /cron check
- toolschecker-ge-ws
- Webservice for /webservice/gridengine check
- toolschecker-k8s-ws
- Webservice for /webservice/kubernetes check
Checks
/cron
Expects the mtime of /data/project/toolschecker/crontest.txt to be updated every 5 minutes by a grid job executed by the toolschecker tool.
Troublshooting:
- ssh login.tools.wmaflabs.org
- become toolschecker
- crontab -l
*/5 * * * * /usr/bin/jsub -N toolschecker.crontest -once -quiet touch /data/project/toolschecker/crontest.txt
/db/toolsdb
/db/wikilabelsrw
/dns/private
/etcd/flannel
/etcd/k8s
/grid/continuous/stretch
There is a small script in /data/project/toolschecker/bin/long-running.sh that runs as a job that runs forever. If it stops running, this checker will go critical. To prevent that there is a cron job definition of:
*/5 * * * * jlocal /data/project/toolschecker/bigbrother.sh test-long-running-stretch /data/project/toolschecker/bin/long-running.sh
The bigbrother.sh script checks for the job and restarts it if not found.