KubraGen Builder: Kube State Metrics
kg_kubestatemetrics is a builder for KubraGen that deploys a Kube State Metrics service in Kubernetes.
KubraGen is a Kubernetes YAML generator library that makes it possible to generate configurations using the full power of the Python programming language.
- Website: https://github.com/RangelReale/kg_kubestatemetrics
- Repository: https://github.com/RangelReale/kg_kubestatemetrics.git
- Documentation: https://kg_kubestatemetrics.readthedocs.org/
- PyPI: https://pypi.python.org/pypi/kg_kubestatemetrics
Example
from kubragen import KubraGen
from kubragen.consts import PROVIDER_GOOGLE, PROVIDERSVC_GOOGLE_GKE
from kubragen.object import Object
from kubragen.option import OptionRoot
from kubragen.options import Options
from kubragen.output import OutputProject, OD_FileTemplate, OutputFile_ShellScript, OutputFile_Kubernetes, \
OutputDriver_Print
from kubragen.provider import Provider
from kg_kubestatemetrics import KubeStateMetricsBuilder, KubeStateMetricsOptions
kg = KubraGen(provider=Provider(PROVIDER_GOOGLE, PROVIDERSVC_GOOGLE_GKE), options=Options({
'namespaces': {
'mon': 'app-monitoring',
},
}))
out = OutputProject(kg)
shell_script = OutputFile_ShellScript('create_gke.sh')
out.append(shell_script)
shell_script.append('set -e')
#
# OUTPUTFILE: app-namespace.yaml
#
file = OutputFile_Kubernetes('app-namespace.yaml')
file.append([
Object({
'apiVersion': 'v1',
'kind': 'Namespace',
'metadata': {
'name': 'app-monitoring',
},
}, name='ns-monitoring', source='app', instance='app')
])
out.append(file)
shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))
shell_script.append(f'kubectl config set-context --current --namespace=app-monitoring')
#
# SETUP: kube-state-metrics
#
ksm_config = KubeStateMetricsBuilder(kubragen=kg, options=KubeStateMetricsOptions({
'namespace': OptionRoot('namespaces.mon'),
'basename': 'myksm',
'config': {
},
'kubernetes': {
'resources': {
'deployment': {
'requests': {
'cpu': '150m',
'memory': '300Mi'
},
'limits': {
'cpu': '300m',
'memory': '450Mi'
},
},
},
}
}))
ksm_config.ensure_build_names(ksm_config.BUILD_ACCESSCONTROL, ksm_config.BUILD_SERVICE)
#
# OUTPUTFILE: kubestatemetrics-config.yaml
#
file = OutputFile_Kubernetes('kubestatemetrics-config.yaml')
out.append(file)
file.append(ksm_config.build(ksm_config.BUILD_ACCESSCONTROL))
shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))
#
# OUTPUTFILE: kubestatemetrics.yaml
#
file = OutputFile_Kubernetes('kubestatemetrics.yaml')
out.append(file)
file.append(ksm_config.build(ksm_config.BUILD_SERVICE))
shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))
#
# Write files
#
out.output(OutputDriver_Print())
# out.output(OutputDriver_Directory('/tmp/build-gke'))Output:
****** BEGIN FILE: 001-app-namespace.yaml ********
apiVersion: v1
kind: Namespace
metadata:
name: app-monitoring
****** END FILE: 001-app-namespace.yaml ********
****** BEGIN FILE: 002-kubestatemetrics-config.yaml ********
apiVersion: v1
kind: ServiceAccount
metadata:
name: myksm
namespace: app-monitoring
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: myksm
<...more...>
****** END FILE: 002-kubestatemetrics-config.yaml ********
****** BEGIN FILE: 003-kubestatemetrics.yaml ********
apiVersion: apps/v1
kind: Deployment
metadata:
name: myksm
namespace: app-monitoring
labels:
app: myksm
spec:
selector:
matchLabels:
app: myksm
<...more...>
****** END FILE: 003-kubestatemetrics.yaml ********
****** BEGIN FILE: create_gke.sh ********
#!/bin/bash
set -e
kubectl apply -f 001-app-namespace.yaml
kubectl config set-context --current --namespace=app-monitoring
kubectl apply -f 002-kubestatemetrics-config.yaml
kubectl apply -f 003-kubestatemetrics.yaml
****** END FILE: create_gke.sh ********
Credits
based on
Author
Rangel Reale (rangelreale@gmail.com)
