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Merge pull request #13405 from serathius/downgrade-b

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Implement single node downgrades
This commit is contained in:
Piotr Tabor
2021-10-29 23:22:10 +02:00
committed by GitHub
parent 9c28e07588 9d47a97b0b
commit 6c2f5dc78a
23 changed files with 647 additions and 241 deletions
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23
server/etcdserver/api/membership/cluster.go
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@@ -271,12 +271,15 @@ func (c *RaftCluster) Recover(onSet func(*zap.Logger, *semver.Version)) {
if c.be != nil {
c.downgradeInfo = c.be.DowngradeInfoFromBackend()
}
d := &serverversion.DowngradeInfo{Enabled: false}
if c.downgradeInfo != nil {
d = &serverversion.DowngradeInfo{Enabled: c.downgradeInfo.Enabled, TargetVersion: c.downgradeInfo.TargetVersion}
}
sv := semver.Must(semver.NewVersion(version.Version))
serverversion.MustDetectDowngrade(c.lg, sv, c.version, d)
if c.downgradeInfo != nil && c.downgradeInfo.Enabled {
c.lg.Info(
"cluster is downgrading to target version",
zap.String("target-cluster-version", c.downgradeInfo.TargetVersion),
zap.String("current-server-version", sv.String()),
)
}
serverversion.MustDetectDowngrade(c.lg, sv, c.version)
onSet(c.lg, c.version)
for _, m := range c.members {
@@ -548,7 +551,7 @@ func (c *RaftCluster) SetVersion(ver *semver.Version, onSet func(*zap.Logger, *s
oldVer := c.version
c.version = ver
sv := semver.Must(semver.NewVersion(version.Version))
serverversion.MustDetectDowngrade(c.lg, sv, c.version, c.downgradeInfo)
serverversion.MustDetectDowngrade(c.lg, sv, c.version)
if c.v2store != nil {
mustSaveClusterVersionToStore(c.lg, c.v2store, ver)
}
@@ -759,14 +762,6 @@ func (c *RaftCluster) SetDowngradeInfo(d *serverversion.DowngradeInfo, shouldApp
}
c.downgradeInfo = d
if d.Enabled {
c.lg.Info(
"The server is ready to downgrade",
zap.String("target-version", d.TargetVersion),
zap.String("server-version", version.Version),
)
}
}
// IsMemberExist returns if the member with the given id exists in cluster.