Reset agent state if the instance id changed on agent restart #892
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| @@ -96,6 +98,18 @@ func newDockerTaskEngineState() *DockerTaskEngineState { | |||
| } | |||
| } | |||
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| // Reset resets all the states | |||
| func (state *DockerTaskEngineState) Reset() { | |||
| state.lock.RLock() | |||
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This should be Lock and Unlock instead of RLock and RUnlock
| @@ -232,6 +232,8 @@ func (agent *ecsAgent) newTaskEngine(containerChangeEventStream *eventstream.Eve | |||
| log.Warnf(instanceIDMismatchErrorFormat, | |||
| previousEC2InstanceID, currentEC2InstanceID) | |||
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| // Reset agent state as a new container instance | |||
| state.Reset() | |||
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It seems like you'd need to invoke statemanager.Save() here as well? Otherwise, an agent restart here may still result in the wrong state, yes?
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I don't think so, the file will be override later. And if agent restart at this point, it will run into the same code path state.Reset will be executed again.
richardpen
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| @@ -96,6 +98,18 @@ func newDockerTaskEngineState() *DockerTaskEngineState { | |||
| } | |||
| } | |||
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| // Reset resets all the states | |||
| func (state *DockerTaskEngineState) Reset() { | |||
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Can you modify this so that you extract all the state.xxx=make() bits into a new method, and invoke it here and from newDockerTaskEngineState() so that in future if we modify this struct to persist more state, there's no cognitive load of updating Reset method as well?
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Summary
Fix #859
Implementation details
Rest the agent state when detected the instance id is different from the one stored in the agent state file.
Testing
make release)go build -out amazon-ecs-agent.exe ./agent)make test) passgo test -timeout=25s ./agent/...) passmake run-integ-tests) pass.\scripts\run-integ-tests.ps1) passmake run-functional-tests) pass.\scripts\run-functional-tests.ps1) passNew tests cover the changes:
Description for the changelog
Licensing
This contribution is under the terms of the Apache 2.0 License:
yes