Weekly Kubernetes Community Hangout Notes - March 27 2015

Every week the Kubernetes contributing community meet virtually over Google Hangouts. We want anyone who's interested to know what's discussed in this forum.

Agenda:

- Andy - demo remote execution and port forwarding

- Quinton - Cluster federation - Postponed

- Clayton - UI code sharing and collaboration around Kubernetes

Notes from meeting:

1. Andy from RedHat:

• Demo remote execution

  • kubectl exec -p $POD -- $CMD

  • Makes a connection to the master as proxy, figures out which node the pod is on, proxies connection to kubelet, which does the interesting bit. via nsenter.

  • Multiplexed streaming over HTTP using SPDY

  • Also interactive mode:

  • Assumes first container. Can use -c $CONTAINER to pick a particular one.

  • If have gdb pre-installed in container, then can interactively attach it to running process

    • backtrace, symbol tbles, print, etc. Most things you can do with gdb.

  • Can also with careful flag crafting run rsync over this or set up sshd inside container.

  • Some feedback via chat:

• Andy also demoed port forwarding

• nsenter vs. docker exec

  • want to inject a binary under control of the host, similar to pre-start hooks

  • socat, nsenter, whatever the pre-start hook needs

• would be nice to blog post on this

• version of nginx in wheezy is too old to support needed master-proxy functionality

2. Clayton: where are we wrt a community organization for e.g. kubernetes UI components?

• google-containers-ui IRC channel, mailing list.
• Tim: google-containers prefix is historical, should just do "kubernetes-ui"
• also want to put design resources in, and bower expects its own repo.
• General agreement

3. Brian Grant:

• Testing v1beta3, getting that ready to go in.
• Paul working on changes to commandline stuff.
• Early to mid next week, try to enable v1beta3 by default?
• For any other changes, file issue and CC thockin.

4. General consensus that 30 minutes is better than 60

• Shouldn't artificially try to extend just to fill time.

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