• How to Monitor Kubernetes Applications with Prometheus Operator

  2 min read

  
  

  Prometheus is an open-source systems monitoring and alerting toolkit that users a multi-dimensional data model with time series data identified by metric name and key/value pairs.

  The Prometheus operator is a Kubernetes operator that simplifies the provision and management of Prometheus instances on Kubernetes. It provides easy management of Prometheus instances as native Kubernetes resources, and also includes a built-in service discovery mechanism to automatically discover and monitor Kubernetes services.

  04/04/2023

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• sceptre: Multiple instances of a template

  2 min read

  
  

  When provisioning cloud resources using sceptre we can endup with plenty of errors that we'll have to track down:

  $ sceptre create example
  Do you want to create 'example' [y/N]: y
  [2023-01-26 05:18:31] - example/s3 - Creating Stack
  [2023-01-26 05:18:33] - example/s3 s3 AWS::CloudFormation::Stack CREATE_IN_PROGRESS User Initiated
  [2023-01-26 05:18:37] - example/s3 Bucket AWS::ServiceCatalog::CloudFormationProvisionedProduct CREATE_IN_PROGRESS
  [2023-01-26 05:18:41] - example/s3 Bucket AWS::ServiceCatalog::CloudFormationProvisionedProduct CREATE_IN_PROGRESS Resource creation Initiated
  [2023-01-26 05:20:15] - example/s3 Bucket AWS::ServiceCatalog::CloudFormationProvisionedProduct CREATE_COMPLETE
  [2023-01-26 05:20:20] - example/s3 s3 AWS::CloudFormation::Stack CREATE_COMPLETE
  [2023-01-26 05:20:24] - example/demo-policy - Creating Stack
  [2023-01-26 05:20:25] - example/demo-policy demo-policy AWS::CloudFormation::Stack CREATE_IN_PROGRESS User Initiated
  [2023-01-26 05:20:29] - example/demo-policy IAMPolicy AWS::ServiceCatalog::CloudFormationProvisionedProduct CREATE_IN_PROGRESS
  [2023-01-26 05:20:33] - example/demo-policy IAMPolicy AWS::ServiceCatalog::CloudFormationProvisionedProduct CREATE_FAILED Resource handler returned message: "Invalid request provided: AWS::ServiceCatalog::CloudFormationProvisionedProduct" (RequestToken: 4580f5a3-bec2-72cc-5f9f-abad3792e57a, HandlerErrorCode: InvalidRequest)
  [2023-01-26 09:20:33] - example/demo-policy demo-policy AWS::CloudFormation::Stack ROLLBACK_IN_PROGRESS The following resource(s) failed to create: [IAMPolicy]. Rollback requested by user.
  [2023-01-26 05:23:12] - example/demo-policy IAMPolicy AWS::ServiceCatalog::CloudFormationProvisionedProduct DELETE_COMPLETE
  [2023-01-26 05:23:12] - example/demo-policy demo-policy AWS::CloudFormation::Stack ROLLBACK_COMPLETE
  

  16/03/2023

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• GitHub Actions: Scheduled Runs

  2 min read

  
  

  GitHub Actions is a powerful automation tool that allows you to automate various tasks and processes, usually triggered by some change in the source repository. Using scheduled runs we are going to be able to schedule runs as well.

  14/03/2023

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• Prometheus: Add label to a metric

  1 min read

  
  

  In Prometheus, to be able to add a label to the metrics retrieved by a particular job we can use relabel_configs.

  08/03/2023

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• Kustomize: Disabling hashed ConfigMap when using configMapGenerator

  2 min read

  
  

  When we try to use configMapGenerator to generate a ConfigMap containing some files like this:

  configMapGenerator:
  - name: config-files
    behavior: create
    files:
    - files/file1.txt
    - files/file2.txt
  

  By default, it is going to append a hash to it:

  $ kubectl get configmap
  NAME                          DATA   AGE
  config-files-m55tkfhh8f       2      45d
  

  If we need to access this ConfigMap by name we might want to remove the hash.

  07/03/2023

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