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Support updating configuraion on the fly #479

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merged 13 commits into from
May 16, 2019
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aylei
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@aylei aylei commented May 9, 2019

What problem does this PR solve?

fix #225

What is changed and how it works?

At the server side, A set of special annotations are introduced, if these annotations present, the PD/TiKV/TiDB statefulset will use the annotation to concat configmap name.

At the client side, if feature gate EnableConfigMapRollout enabled, the client will generate SHA256 digest for configmap data and append the digest in configmap name, while keep the annotations mentioned above in sync.

After a configuration change, the digest changed so the configmap name and annotations changed, the statefulsets will use the new configmap name due to the annotation change, a rolling-update will performed consequently.

Check List

Tests

  • Unit test
  • E2E test
  • Stability test

The stability test case will be more complicated (which may include mis-configuring scenario) and need more discussion, which will be tracked in another issue.

Code changes

  • Has Helm charts change ✔️
  • Has Go code change ✔️
  • Has CI related scripts change ✔️
  • Has documents change ✔️

Release Note

Introduce ConfigMap rollout management. With the feature gate open, configuration file changes will be automatically applied to the cluster via a rolling update.

Signed-off-by: Aylei rayingecho@gmail.com

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 9, 2019

/run-e2e-tests

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 9, 2019

/run-e2e-tests

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aylei commented May 9, 2019

/run-e2e-tests

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 10, 2019

/run-e2e-tests

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 10, 2019

/run-e2e-tests

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aylei commented May 10, 2019

/run-e2e-tests

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 10, 2019

/run-e2e-tests

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 10, 2019

/run-e2e-tests

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aylei commented May 10, 2019

/run-e2e-tests

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aylei commented May 10, 2019

/run-e2e-tests

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aylei commented May 12, 2019

/run-e2e-tests

…ration check instead

Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 13, 2019

/run-e2e-tests

@aylei aylei marked this pull request as ready for review May 13, 2019 12:14
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aylei commented May 13, 2019

@weekface @cofyc @tennix @xiaojingchen PTAL

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Do we need to add the Release notes or a user-facing change to the PR and open another cherry-pick to release-1.0 when it merged as k8s does?

kubernetes/kubernetes#75900

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Co-Authored-By: weekface <weekface@gmail.com>
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lgtm

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/run-e2e-test

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aylei commented May 15, 2019

Do we need to add the Release notes or a user-facing change to the PR and open another cherry-pick to release-1.0 when it merged as k8s does?

kubernetes/kubernetes#75900

Good idea, yes I think this should be cherry-picked to the 1.0 release

@aylei aylei requested review from weekface and xiaojingchen May 15, 2019 06:26
Signed-off-by: Aylei <rayingecho@gmail.com>
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aylei commented May 15, 2019

/run-e2e-tests

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aylei commented May 15, 2019

/run-e2e-tests

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aylei commented May 15, 2019

/run-e2e-tests

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aylei commented May 15, 2019

I've introduced the logLevel configuration parameter to validate the rolling-update of PD, PTAL @xiaojingchen @weekface

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lgtm

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lgtm

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How to change the configuration of TiDB/TiKV/Pd on the fly?
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