Add support in the fdb-kubernetes-monitor to read node labels

[johscheuer]

This change allows the fdb-kubernetes-monitor to read values from the node labels of the node where it is hosted. In order to be able to read those labels the fdb-kubernetes-monitor must have the appropriate Kubernetes RBAC permissions. Once this change is merged we have to make changes on the operator to enable this feature.

Fixes: FoundationDB/fdb-kubernetes-operator#817
Fixes: FoundationDB/fdb-kubernetes-operator#2041

I updated the approach in a way that it is compatible with environment variable replacements. That way the changes on the operator side are minimal (we just have to make sure we can enable/disable the read node labels setting). Then the user can make use of the environment replacement logic: https://github.com/FoundationDB/fdb-kubernetes-operator/blob/main/docs/manual/fault_domains.md#using-kubernetes-failure-zones and the benefit is, that this will also work to inject custom localities, e.g. for three data hall.

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[johscheuer]

Create FoundationDB/fdb-kubernetes-operator#2039 for the operator side.

[foundationdb-ci]

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[foundationdb-ci]

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[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

• Commit ID: d7d9278
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• Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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[foundationdb-ci]

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Result of foundationdb-pr-clang-ide on Linux CentOS 7

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[foundationdb-ci]

Result of foundationdb-pr-clang on Linux CentOS 7

• Commit ID: 9013d8c
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• Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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[foundationdb-ci]

Result of foundationdb-pr-clang on Linux CentOS 7

• Commit ID: 3421b09
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• Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

• Commit ID: 3421b09
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• Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

• Commit ID: 9013d8c
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• Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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[foundationdb-ci]

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[foundationdb-ci]

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[foundationdb-ci]

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Result of foundationdb-pr-cluster-tests on Linux CentOS 7

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[foundationdb-ci]

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Result of foundationdb-pr on Linux CentOS 7

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Result of foundationdb-pr on Linux CentOS 7

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[foundationdb-ci]

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[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

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[foundationdb-ci]

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[nicmorales9]

LGTM minus the one note, I would have John double check as well since he had many comments before the changes

[brownleej]

👍

[foundationdb-ci]

Result of foundationdb-pr-clang-ide on Linux CentOS 7

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Result of foundationdb-pr-cluster-tests on Linux CentOS 7

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Result of foundationdb-pr on Linux CentOS 7

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