Swarm mode

Some notes while swarm-mode is implementing

Swarm mode is supported by docker engine at 1.12 version. Now support of it in our system is under development.

issues

https://github.com/codeabovelab/haven-platform/labels/swarm-mode

Roadmap

• implement docker DTOs (possibly already finished)
• extends DockerService for new api methods
• make new cluster kind and do some refactoring. Swarm-mode define allow to orchestrate only through master-nodes (note that it can be more that one), but also allow to change it nodes by election. Current RealCluster does not support this.
• support for
• scaling
• rolling update

docker

Docker Api

Swarm doc

oddities

• Engine allow to create cluster with one node, allow add second node, but broken when we remove newly added node (need investigation and workaround)
• Cluster has ID, and does not allow add any custom labels - we can not store additional info
• Node id will be generated at join, and rejoined node has new ID - so cluster allow address node by name (need check behavior of adding two nodes with same host name to cluster). Also cluster allow to join multiple nodes with same name.