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Add dump command to kubectl #3500

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dchen1107 opened this issue Jan 15, 2015 · 10 comments · Fixed by #4346
Closed

Add dump command to kubectl #3500

dchen1107 opened this issue Jan 15, 2015 · 10 comments · Fixed by #4346
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area/introspection area/kubectl priority/backlog Higher priority than priority/awaiting-more-evidence. sig/node Categorizes an issue or PR as relevant to SIG Node.

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@dchen1107
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When a user report an issue on Kubernetes, we normally ask them to provide some outputs by running kubectl commands, such as kubectl get , kubectl describe etc. We ask for daemons' log from various nodes often. Sometimes the user has to reproduce the issue for us because the config is changed. Meanwhile the developer might spend a lot of time on debugging the issues on a deprecated version or mismatched client with server.

I propose to add a dump command to kubectl, which collects related outputs, logs, from various components or related nodes, then generate a tarball and attach that to the issue.

@dchen1107 dchen1107 added priority/backlog Higher priority than priority/awaiting-more-evidence. area/introspection labels Jan 15, 2015
@dchen1107
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cc @lavalamp @brendandburns @thockin

@davidopp
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This seems very useful. It could be the starting point for a more comprehensive diagnose-me that the user runs when they see a problem.

@satnam6502
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For a while now the kubelet logs have been collected by node level logging. For Elasticsearch the user needs to enable cluster level logging (on by default for Elasticsearch node level logging). For gcp node level logging the kubelet logs will have been ingested into the cloud logging console for the GCE project used to host the cluster.

@dchen1107
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cc/ @jszczepkowski @piosz

They are going to help with this issue. Thanks!

jszczepkowski added a commit to jszczepkowski/kubernetes that referenced this issue Feb 12, 2015
…Kubernetes cluster for debugging. Tested on GCE only. This is initial attempt to fix kubernetes#3500.
@jszczepkowski
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I guess this issue is not closed yet (it was incorrectly closed by keyword in PR message).

@jszczepkowski jszczepkowski reopened this Feb 27, 2015
@jszczepkowski
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Together with @piosz, we propose to dump the following information:

  1. Kubernetes level: description of all kubernetes resources: nodes, replication controllers, services, pods:
    kubectl get nodes,podes,rc,services,events -o json,
  2. Docker level: docker processes and images on each master/minion node:
    docker ps -a,
    docker images.
  3. Etcd level: version of etcd and boundpods stored in it:
    etcd --version,
    etcdctl get boundpods.
  4. (may consume a lot of space): the whole state (dump) of etcd.
  5. (may consume a lot of space): logs of the following components: kubelet, docker, etcd, kube-apiserver and kube-addons.

The information will be dump by hack/kube-dump.sh script. The initial version of the script (PR #4346) implements point 1, 2 and 3.

We suggest extending the kube-dump.sh by adding of the following flags:
--all: dump etcd state and logs: in addition to points 1, 2 and 3, also dump information proposed in pointes 4 and 5 (this may consume a lot of space);
--issue=XXX: instead of writing output to stdout, make a tarball and attach it to #XXX issue on kubernetes github.

@bgrant0607 bgrant0607 added the sig/node Categorizes an issue or PR as relevant to SIG Node. label Feb 28, 2015
@bgrant0607 bgrant0607 added priority/important-soon Must be staffed and worked on either currently, or very soon, ideally in time for the next release. and removed priority/backlog Higher priority than priority/awaiting-more-evidence. labels Feb 4, 2016
@bgrant0607 bgrant0607 added this to the v1.2 milestone Feb 4, 2016
@bgrant0607
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Proposed command is kubectl cluster-info dump (turning cluster-info into a command group).

@bgrant0607 bgrant0607 modified the milestone: next-candidate Apr 28, 2016
k8s-github-robot pushed a commit that referenced this issue May 24, 2016
Automatic merge from submit-queue

Add a 'kubectl clusterinfo dump' option

Ref: #3500 

@bgrant0607 @smarterclayton @jszczepkowski 

Usage:
```
  # Dump current cluster state to stdout
  kubectl clusterinfo dump
  
  # Dump current cluster state to /tmp
  kubectl clusterinfo dump --output-directory=/tmp
  
  # Dump all namespaces to stdout
  kubectl clusterinfo dump --all-namespaces
  
  # Dump a set of namespaces to /tmp
  kubectl clusterinfo dump --namespaces default,kube-system --output-directory=/tmp
```

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@dims
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dims commented Jul 10, 2016

@brendandburns @bgrant0607 - Is there anything else needed to be done in this PR? (can it be closed?)

@bgrant0607 bgrant0607 added priority/backlog Higher priority than priority/awaiting-more-evidence. and removed priority/important-soon Must be staffed and worked on either currently, or very soon, ideally in time for the next release. labels Jul 15, 2016
@bgrant0607
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@dims The original proposal wasn't fully implemented, but a new more specific issue can be filed to record additional data.

@dchen1107
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cc/ @coufon

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7 participants