feat: extend kube_inventory plugin to include resourcequota measurement and extend node and pod measurement

[varunjain0606]

Checks:

• Updated associated README.md.
• Wrote appropriate unit tests.
• Pull request title or commits are in [conventional commit format]

Requirements:
Requirements have been included in the link below
#9621

Resolves
Included some more metrics in kubernetes_node, kubernetes_pod_container measurement in kube_inventory plugin as that would enhance the monitoring of k8s. Also add a resource type "resourcequotas" for even better monitoring of quota management.

Description:
Added these new metrics in kubernetes_node measurement within kube_inventory plugin.

1. count
2. status_condition
3. spec_schedulable

Added tags:

1. status
2. condition

Added these new metrics in kubernetes_pod_container measurement within kube_inventory plugin.

1. status_condition

Added tags:

1. status
2. condition

Added new kubernetes_resourcequota measurement and added these metrics

1. hard_cpu_cores_limit
2. hard_memory_bytes_limit
3. hard_pods_limit
4. used_cpu_cores
5. used_memory_bytes
6. used_pods

Added tags:

1. resource
2. namespace

Example:
Output -
kubernetes_node,host=vjain count=8i 1628918652000000000
kubernetes_node,condition=Ready,host=vjain,node_name=ip-172-17-0-2.internal,status=True status_condition=1i 1629177980000000000
kubernetes_node,cluster_namespace=tools,condition=Ready,host=vjain,node_name=ip-172-17-0-2.internal,status=True allocatable_cpu_cores=4i,allocatable_memory_bytes=7186567168i,allocatable_millicpu_cores=4000i,allocatable_pods=110i,capacity_cpu_cores=4i,capacity_memory_bytes=7291424768i,capacity_millicpu_cores=4000i,capacity_pods=110i,spec_unschedulable=0i,status_condition=1i 1628918652000000000
kubernetes_pod_container,condition=Ready,host=vjain,pod_name=uefi-5997f76f69-xzljt,status=True status_condition=1i 1629177981000000000
kubernetes_resourcequota,host=vjain,namespace=default,resource=pods-medium hard_cpu_cores=10i,hard_memory_bytes=21474836480i,hard_pods=10i,used_cpu_cores=0i,used_memory_bytes=0i,used_pods=0i 1629110393000000000

[telegraf-tiger]

Looks like new artifacts were built from this PR. Get them here!

Artifact URLs

• darwin_amd64.tar.gz

• windows_amd64.zip

• windows_i386.zip

• static_linux_amd64.tar.gz

• armv6hl.rpm

• freebsd_armv7.tar.gz

• linux_armhf.tar.gz

• armhf.deb

• armel.rpm

• linux_armel.tar.gz

• armel.deb

• linux_mipsel.tar.gz

• mipsel.deb

• i386.rpm

• freebsd_i386.tar.gz

• linux_i386.tar.gz

• i386.deb

• x86_64.rpm

• freebsd_amd64.tar.gz

• linux_amd64.tar.gz

• amd64.deb

• ppc64le.rpm

• linux_ppc64le.tar.gz

• ppc64el.deb

• aarch64.rpm

• linux_arm64.tar.gz

• arm64.deb

• s390x.rpm

• linux_s390x.tar.gz

• s390x.deb

• linux_mips.tar.gz

• mips.deb

[sspaink]

@varunjain0606 thank you for contributing this pull request, it looks like there are some issues with the tests. Do you have time to continue working on this?

[varunjain0606]

@sspaink I have fixed the test cases. This PR has few changes that can be split into 2 or 3 PRs. Please let me know if you want me to split them. I have requirement for all of these changes along with some other changes that I can submit in the follow up PRs. These changes can be really helpful to monitor k8s infrastructure for everyone. Thanks

[sspaink]

@varunjain0606 it looks like there are two files processor and test that might have been added by mistake to this pull request, they seem like they are binaries? I think the changes you've made should be ok within just this pull request.

[varunjain0606]

@varunjain0606 it looks like there are two files processor and test that might have been added by mistake to this pull request, they seem like they are binaries? I think the changes you've made should be ok within just this pull request.

Sorry for the unnecessary files in the PR. I have removed them now. Please have a look at the PR again @sspaink

[bougou]

Kuberenetes node currently exposed several node conditions:

• Ready
• DiskPressure
• MemoryPressure
• NetworkUnavailable
• PIDPressure

The condition status value might be string value False, True, or Unkown.

The #10147 PR just adds those conditions as new fields on kubernetes_node measurement with value converted to integer (0, 1, 2), with no tags are introduced.

kubernetes_node,tagname="foobar" condition_ready=0i condition_disk_pressure=1i condition_network_unavailable=1i condition_pid_pressure=1i condition_memory_pressure=1i 1547597616000000000

It seems that this PR (#9627) treats this part in way that:

Add a status_condition field with converted integer value, and adds the condition name in tag condition.

[telegraf-tiger]

Download PR build artifacts for linux_amd64.tar.gz, darwin_amd64.tar.gz, and windows_amd64.zip.
Downloads for additional architectures and packages are available below.

🥳 This pull request decreases the Telegraf binary size by -3.75 % for linux amd64 (new size: 142.9 MB, nightly size 148.5 MB)

📦 Click here to get additional PR build artifacts

Artifact URLs

DEB	RPM	TAR GZ	ZIP
amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	darwin_arm64.tar.gz	windows_i386.zip
armel.deb	armv6hl.rpm	freebsd_amd64.tar.gz
armhf.deb	i386.rpm	freebsd_armv7.tar.gz
i386.deb	ppc64le.rpm	freebsd_i386.tar.gz
mips.deb	riscv64.rpm	linux_amd64.tar.gz
mipsel.deb	s390x.rpm	linux_arm64.tar.gz
ppc64el.deb	x86_64.rpm	linux_armel.tar.gz
riscv64.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
		linux_mipsel.tar.gz
		linux_ppc64le.tar.gz
		linux_riscv64.tar.gz
		linux_s390x.tar.gz
		static_linux_amd64.tar.gz

[powersj]

Hi @varunjain0606,

Sorry that no one ever got back to you on this PR. Are you still interested in seeing it land? If so, could I have you rebase on master and ensure tests pass?

Thanks!

[telegraf-tiger]

Hello! I am closing this issue due to inactivity. I hope you were able to resolve your problem, if not please try posting this question in our Community Slack or Community Page. Thank you!

[varunjain0606]

@powersj Can you please take a look at this updated PR. I have re-based and verified all tests are passing
#13040