Jenkins nodes should be able to disconnect themselves if they are not ready to run jobs.

[cailafinn]

Contribution to Target

A node that is certain it cannot pass a job is not useful. A node should only be available to jenkins if it knows it is able to pass jobs.

Things a node needs:

• Up-to-date testing data
• Connection to anaconda
• Connection to GitHub
• The ability to stop itself running builds.
  • This can be done using the Jenkins HTTP API:
  • curl -X POST https://<USER>:<TOKEN>@builds.mantidproject.org/computer/<NODE>/toggleOffline?offlineMessage=<REASON_FOR_DISCONNECT>
  • builds.mantidproject.org/computer/isis-ndw1170/api/json can be used to get json including the temporarilyOffline status of the node.