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Code Issues Releases Wiki Activity

Updated design after suffering power failured

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David Young
2017-07-17 10:21:08 +12:00
parent 4548e63b60
commit 7377f522b0
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docs/ha-docker-swarm/design.md
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@@ -62,3 +62,13 @@ When the failed (or upgraded) host is restored to service, the following is illu
![HA function](images/docker-swarm-node-restore.png)
### Total cluster failure
A day after writing this, my environment suffered a fault whereby all 3 VMs were unexpectedly and simultaneously powered off.
Upon restore, docker failed to start on one of the VMs due to local disk space issue[^1]. However, the other two VMs started, established the swarm, mounted their shared storage, and started up all the containers (services) which were managed by the swarm.
In summary, although I suffered an **unplanned power outage to all of my infrastructure**, followed by a **failure of a third of my hosts**... ==all my platforms are 100% available with **absolutely no manual intervention**==.
[^1]: Since there's no impact to availability, I can fix (or just reinstall) the failed node whenever convenient.