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Drift

Find configuration drifts on Kubernetes resources or Helm charts running in your cluster.

Drifter scans your cluster for installed kubernetes components , installed Helm charts, then cross-checks them against the passed expectation file .

Installing

Using Drifter is easy. First, use go get to install the latest version of the library.

go get -u github.com/ajayk/drifter@latest

Next, include Drifter in your application:

import "github.com/ajayk/drifter"

Usage

drifter check -k /Users/drifter/.kube/config -c  examples/gcp-gke-check.yaml

Drifter check returns either an exit code of 0 (pass) or 2 (fail)

Usage Demo

asciicast

Drifter Schema:

Drifter yaml is easy to configure to check the expectations Currently supports 10 different type of validators

  • helm
  • namespaces
  • deployments
  • daemonsets
  • statefulsets
  • secrets
  • configmaps
  • ingress classes
  • storage classes
  • serviceaccounts
  • clusterroles

check examples directory for each different type of validator

helm:
  components:
    - name: ingress-nginx
      version: 4.2.3
      appVersion: 1.2.0
    - name: external-secrets-operator
      version: 0.6.8 # just chart version check not checking for appVersion here 

kubernetes:
  namespaces:
    - name: kube-system
    - name: es

  daemonsets:
    - namespace: kube-system
      names:
        - anetd
        - nvidia-gpu-device-plugin
    - namespace: gmp-public
      names:
        - node-exporter

  deployments:
    - namespace: kube-system
      names:
        - kube-dns

  statefulsets:
    - namespace: gkebackup
      names:
        - gkebackup-agent

  storage:
    classes:
      - filestore-premium-rwx
      - filestore-standard-rwx

  ingress:
    classes:
      - nginx