feature: support multi nodes config for es

[hyphennn]

This PR is mainly commited to support the issue #3567 , which allow users to configure multi nodes for elasticsearch.

[google-cla]

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[k8s-ci-robot]

Hi @hyphennn. Thanks for your PR.

I'm waiting for a google member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[iwankgb]

/ok-to-test

[iwankgb]

/ok-to-test

[hyphennn]

I forked this repo with my PR, then run it in my company's project. Until now, after more than one month, I think it works well. Looking forward to this PR being accepted.

[iwankgb]

/ok-to-test

[iwankgb]

I do appreciate your work, @hyphennn, but for some reason I can't trigger missing CI build step :|

[hyphennn]

I do appreciate your work, @hyphennn, but for some reason I can't trigger missing CI build step :|

Haha, never mind. Maybe we need wait for sometime