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enhance: avoid the coexistence of the old coordinator and the new node/proxy #35720

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Aug 29, 2024
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enhance: avoid the coexistence of the old coordinator and the new node/proxy #35720

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29 changes: 29 additions & 0 deletions cmd/roles/roles.go
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Original file line number Diff line number Diff line change
Expand Up @@ -421,6 +421,35 @@ func (mr *MilvusRoles) Run() {
componentMap[typeutil.QueryCoordRole] = queryCoord
}

waitCoordBecomeHealthy := func() {
for {
select {
case <-ctx.Done():
log.Info("wait all coord become healthy loop quit")
return
default:
rcState := rootCoord.Health(ctx)
dcState := dataCoord.Health(ctx)
icState := indexCoord.Health(ctx)
qcState := queryCoord.Health(ctx)

if rcState == commonpb.StateCode_Healthy && dcState == commonpb.StateCode_Healthy && icState == commonpb.StateCode_Healthy && qcState == commonpb.StateCode_Healthy {
log.Info("all coord become healthy")
return
}
log.Info("wait all coord become healthy", zap.String("rootCoord", rcState.String()), zap.String("dataCoord", dcState.String()), zap.String("indexCoord", icState.String()), zap.String("queryCoord", qcState.String()))
time.Sleep(time.Second)
}
}
}

// In standalone mode, block the start process until the new coordinator is active to avoid the coexistence of the old coordinator and the new node/proxy
// 1. In the start/restart process, the new coordinator will become active immediately and will not be blocked
// 2. In the rolling upgrade process, the new coordinator will not be active until the old coordinator is down, and it will be blocked
if mr.Local {
waitCoordBecomeHealthy()
}

if mr.EnableQueryNode {
queryNode = mr.runQueryNode(ctx, local, &wg)
componentMap[typeutil.QueryNodeRole] = queryNode
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