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Prevent newdeploy updates deployment if no resources changed (#1452)

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We used to update timestamp in the deployment environment field 
in order to trigger a rolling update when the function referenced 
resources get updated. However, use timestamp means we are not 
able to avoid triggering a rolling update when executor tries to adopt 
orphaned deployment due to timestamp changed which is unwanted. 
In order to let executor adopt deployment without triggering a rolling 
update, we need an identical way to get a value that can reflect res-
ources changed without affecting by time.

To achieve this goal, the sum of the resource version of all referenced 
resources is a good fit for our scenario since the sum of the resource 
version is always the same as long as no resources changed.
This commit is contained in:
Ta-Ching Chen
2019-12-02 06:35:07 +08:00
committed by GitHub
parent 763ab475f2
commit 003c304105
3 changed files with 74 additions and 10 deletions
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pkg/apis/fission.io/v1/const.go
+2 -2
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@@ -22,8 +22,8 @@ const (
)
const (
//LastUpdateTimestamp env variable is used for updating configmaps and secrets in pods
LastUpdateTimestamp string = "LASTUPDATE_TIMESTAMP"
// ResourceVersionCount env variable is used for updating configmaps and secrets in pods
ResourceVersionCount string = "RESOURCE_VERSION_COUNT"
)
const (