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upgrade k8s without deleting etcd data #1038
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642a0df
update k8s without deleting etcd data
0e3953e
merge master
be6c811
create configmap by apply
DongZhaoYu 48d414d
Merge branch 'master' of github.com:Microsoft/pai into zhaoyu/k8s-upg…
DongZhaoYu 856a2c0
overwrite conflicts when apply new configuration on start
DongZhaoYu 57af543
Merge branch 'master' of github.com:Microsoft/pai into zhaoyu/k8s-upg…
DongZhaoYu 8581cb9
enable overwrite when starting dashboard and kube-proxy
DongZhaoYu 3263fe2
overwrite old kube-proxy config when starting
DongZhaoYu bb68cd5
overwrite existing node label
DongZhaoYu de09718
change zookeeper start option
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What‘s effect of --dry-run here? And what's effect of --overwrite here?
If I remove --overwrite, what will happen? I know when we label the node with overwrite, if the key already exists, it will be overwritten.
But when applying some object, without the --overwrite, it still works. So I wanna know what's the purpose of --overwrite here.
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The --dry-run here is to let create command generate the configuration without executing it. Since we need to read config from host-configuration file, the apply command cannot support reading config from a file. So I leverage the create dry run to generate the config and then apply it to the object.
The --overwrite flag is to resolve the conflict when applying new configuration by overwriting the old config with the new one. If we don't enable overwrite here, when merge the new config with the live config, if conflicts occur, the apply will fail and kubectl will report an error. Here I enable --overwrite is to make sure the new config can be successfully applied to the live object in case the object has been restored by k8s.