Optmize node watcher in daemon

[alan-kut]

Node watcher is very heavy when watching
all the nodes, not only the current one.
Nodes are regularly updated, e.g. by kubelet.

Watch only the current node all the time and
other nodes only when holding the drain lock.

[github-actions]

Thanks for your PR,
To run vendors CIs use one of:

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  Best regards.

[github-actions]

Thanks for your PR,
To run vendors CIs use one of:

• /test-all: To run all tests for all vendors.
• /test-e2e-all: To run all E2E tests for all vendors.
• /test-e2e-nvidia-all: To run all E2E tests for NVIDIA vendor.

To skip the vendors CIs use one of:

• /skip-all: To skip all tests for all vendors.
• /skip-e2e-all: To skip all E2E tests for all vendors.
• /skip-e2e-nvidia-all: To skip all E2E tests for NVIDIA vendor.
  Best regards.

[coveralls]

Pull Request Test Coverage Report for Build 7889385247

Details

• -38 of 50 (24.0%) changed or added relevant lines in 1 file are covered.
• 8 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 30.011%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/daemon/daemon.go	12	50	24.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/daemon/daemon.go	8	35.46%

Totals
Change from base Build 7875814354:	-0.2%
Covered Lines:	3538
Relevant Lines:	11789

---

💛 - Coveralls

[alan-kut]

/test-all

[adrianchiris]

@alan-kut currently there is work around moving the drain logic to a centralized controller[1]

I think that part of this work, we can limit the node informer to just the current node. WDYT ?

@SchSeba ^^ Thoughts?

[1] #555

[SchSeba]

sure we can do it after we merge #555

[SchSeba]

Hi @alan-kut thanks for the PR!

so the idea base on #555 is that we are not going to watch the node anymore the daemon will only watch the nodeState and in the future also the operator will not watch the nodes as we are going to move the drain request annotation to the nodeState only

[SchSeba]

Hi @alan-kut can you take a look on the operator now that we remove the nodes update from the config daemon we have it only on the controller