Package: kg-promtail
KubraGen Builder: Promtailkg_promtail is a builder forKubraGenthat deploys
aPromtailservice in Kubernetes.Promtail is commonly used withLoki.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_promtailRepository:https://github.com/RangelReale/kg_promtail.gitDocumentation:https://kg_promtail.readthedocs.org/PyPI:https://pypi.python.org/pypi/kg_promtailExamplefromkubragenimportKubraGenfromkubragen.constsimportPROVIDER_GOOGLE,PROVIDERSVC_GOOGLE_GKEfromkubragen.objectimportObjectfromkubragen.optionimportOptionRootfromkubragen.optionsimportOptionsfromkubragen.outputimportOutputProject,OD_FileTemplate,OutputFile_ShellScript,OutputFile_Kubernetes,\OutputDriver_Printfromkubragen.providerimportProviderfromkg_promtailimportPromtailBuilder,PromtailOptions,PromtailConfigFile,PromtailConfigFileOptions,\PromtailConfigFileExt_Kuberneteskg=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: promtail#promtailconfigfile=PromtailConfigFile(options=PromtailConfigFileOptions({}),extensions=[PromtailConfigFileExt_Kubernetes()])promtail_config=PromtailBuilder(kubragen=kg,options=PromtailOptions({'namespace':OptionRoot('namespaces.mon'),'basename':'mypromtail','config':{'promtail_config':promtailconfigfile,'loki_url':'http://loki:3100',},'kubernetes':{'resources':{'daemonset':{'requests':{'cpu':'150m','memory':'300Mi'},'limits':{'cpu':'300m','memory':'450Mi'},},},}}))promtail_config.ensure_build_names(promtail_config.BUILD_ACCESSCONTROL,promtail_config.BUILD_CONFIG,promtail_config.BUILD_SERVICE)## OUTPUTFILE: promtail-config.yaml#file=OutputFile_Kubernetes('promtail-config.yaml')out.append(file)file.append(promtail_config.build(promtail_config.BUILD_ACCESSCONTROL,promtail_config.BUILD_CONFIG))shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))## OUTPUTFILE: promtail.yaml#file=OutputFile_Kubernetes('promtail.yaml')out.append(file)file.append(promtail_config.build(promtail_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-promtail-config.yaml ********
apiVersion: v1
kind: ServiceAccount
metadata:
  name: mypromtail
  namespace: app-monitoring
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: mypromtail
rules:
- apiGroups: ['']
  resources: [nodes, nodes/proxy, services, endpoints, pods]
  verbs: [get, watch, list]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: mypromtail
<...more...>
****** END FILE: 002-promtail-config.yaml ********
****** BEGIN FILE: 003-promtail.yaml ********
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: mypromtail
  namespace: app-monitoring
  labels:
    app: mypromtail
spec:
  selector:
    matchLabels:
      app: mypromtail
  template:
    metadata:
      labels:
        app: mypromtail
    spec:
      serviceAccountName: mypromtail
<...more...>
****** END FILE: 003-promtail.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-promtail-config.yaml
kubectl apply -f 003-promtail.yaml

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