Package: kg-lokistack
KubraGen Builder: Loki Stackkg_lokistack is a builder forKubraGenthat deploys
aLoki Stackstack in Kubernetes.The Loki Stack consists of Loki, Promtail and Grafana (optional).KubraGenis 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_lokistackRepository:https://github.com/RangelReale/kg_lokistack.gitDocumentation:https://kg_lokistack.readthedocs.org/PyPI:https://pypi.python.org/pypi/kg_lokistackExamplefromkg_lokiimportLokiConfigFile,LokiConfigFileOptionsfromkubragenimportKubraGenfromkubragen.constsimportPROVIDER_GOOGLE,PROVIDERSVC_GOOGLE_GKEfromkubragen.objectimportObjectfromkubragen.optionimportOptionRootfromkubragen.optionsimportOptionsfromkubragen.outputimportOutputProject,OD_FileTemplate,OutputFile_ShellScript,OutputFile_Kubernetes,\OutputDriver_Printfromkubragen.providerimportProviderfromkg_lokistackimportLokiStackBuilder,LokiStackOptionskg=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: lokistack#lokiconfigfile=LokiConfigFile(options=LokiConfigFileOptions({}))lokistack_config=LokiStackBuilder(kubragen=kg,options=LokiStackOptions({'namespace':OptionRoot('namespaces.mon'),'basename':'mylokistack','config':{'loki':{'loki_config':lokiconfigfile,},'grafana':{'admin':{'user':'myuser','password':'mypassword',},}},'kubernetes':{'volumes':{'loki-data':{'persistentVolumeClaim':{'claimName':'lokistack-storage-claim'}}},'resources':{'loki-statefulset':{'requests':{'cpu':'150m','memory':'300Mi'},'limits':{'cpu':'300m','memory':'450Mi'},},},}}))lokistack_config.ensure_build_names(lokistack_config.BUILD_ACCESSCONTROL,lokistack_config.BUILD_CONFIG,lokistack_config.BUILD_SERVICE)## OUTPUTFILE: lokistack-config.yaml#file=OutputFile_Kubernetes('lokistack-config.yaml')out.append(file)file.append(lokistack_config.build(lokistack_config.BUILD_ACCESSCONTROL,lokistack_config.BUILD_CONFIG))shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))## OUTPUTFILE: lokistack.yaml#file=OutputFile_Kubernetes('lokistack.yaml')out.append(file)file.append(lokistack_config.build(lokistack_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-lokistack-config.yaml ********
apiVersion: v1
kind: ServiceAccount
metadata:
  name: mylokistack
  namespace: app-monitoring
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: mylokistack-promtail
rules:
- apiGroups: ['']
  resources: [nodes, nodes/proxy, services, endpoints, pods]
  verbs: [get, watch, list]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: mylokistack-promtail
subjects:
- kind: ServiceAccount
  name: mylokistack
  namespace: app-monitoring
<...more...>
****** END FILE: 002-lokistack-config.yaml ********
****** BEGIN FILE: 003-lokistack.yaml ********
apiVersion: v1
kind: Service
metadata:
  name: mylokistack-loki-headless
  namespace: app-monitoring
  labels:
    app: mylokistack-loki
spec:
  clusterIP: None
  ports:
  - port: 3100
    protocol: TCP
    name: http-metrics
    targetPort: http-metrics
  selector:
    app: mylokistack-loki
---
apiVersion: v1
kind: Service
metadata:
  name: mylokistack-loki
<...more...>
****** END FILE: 003-lokistack.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-lokistack-config.yaml
kubectl apply -f 003-lokistack.yaml

****** END FILE: create_gke.sh ********Creditsbased onInstall Loki with HelmAuthorRangel Reale (rangelreale@gmail.com)