Kube-dump

Backup a Kubernetes cluster as a yaml manifest.

• Description
• Quick Start Guides
• Container Images
• Dependencies
• Commands and flags
• Environment variables
• Resources default’s
• Plans for further development

Description

With this utility you can save your cluster resources as nice yaml manifests without unnecessary metadata.

Key features:

• Saving only those resources to which you have read access;
• Can work with a list of namespaces otherwise all available ones will be used;
• Can save both namespaced and cluster wide resources;
• You can run locally, in a container or in a cluster;
• Can archive and rotate dump archives;
• Can commit dumps to a git repository and send to a remote repository;
• You can specify a list of resources to be dumped;
• It is possible to configure via command line arguments as well as via environment variables.

Quick Start Guides

• Run on a local machine (dependencies and a config for kubectl are required)
• Run in container (docker, podman, etc. required and a config for kubectl)
• Run in kubernetes as pod (requires access to the kubernetes cluster and config for kubectl)
• Run in kubernetes as a cron job using a service account (requires access to the kubernetes cluster and the ability to create a role or cluster role)

Container Images

• docker pull ghcr.io/woozymasta/kube-dump:1.1.1
• docker pull quay.io/woozymasta/kube-dump:1.1.1
• docker pull docker.io/woozymasta/kube-dump:1.1.1

Dependencies

Required dependencies:

• kubectl - Kubernetes command-line tool
• jq - Command-line JSON processor
• yq - Command-line YAML processor

Optional dependencies:

• curl - Used to check kubernetes api livez probe when use serviceaccount
• git - Used to store backups as a git repository
• tar - Used to create backup archives with one of the compression libraries:
  • xz - a lossless data compression file format based on the LZMA algorithm
  • gzip - single-file/stream lossless data compression utility
  • bzip2 - compression program that uses the Burrows–Wheeler algorithm

Commands and flags

./kube-dump [command] [[flags]]

Available Commands:
  all, dump                     Dump all kubernetes resources
  ns,  dump-namespaces          Dump namespaced kubernetes resources
  cls, dump-cluster             Dump cluster wide kubernetes resources

The command can also be passed through the environment variable MODE.
All flags presented below have a similar variable in uppercase, with underscores
For example:
  --destination-dir == DESTINATION_DIR 

Flags:
  -h, --help                  This help
  -s, --silent                Execute silently, suppress all stdout messages
  -d, --destination-dir       Path to dir for store dumps, default ./data
  -f, --force-remove          Delete resources in data directory before launch
      --detailed              Do not remove detailed state specific fields
      --output-by-type        Organize output into directories by resource type
      --flat                  Organize all resources of the same type in the
                              same file

Kubernetes flags:
  -n, --namespaces            List of kubernetes namespaces
  -r, --namespaced-resources  List of namespaced resources
  -k, --cluster-resources     List of cluster resources
      --kube-config           Path to kubeconfig file
      --kube-context          The name of the kubeconfig context to use
      --kube-cluster          The name of the kubeconfig cluster to use
      --kube-insecure-tls     Skip check server's certificate for validity

Git commit flags:
  -c, --git-commit            Commit changes
  -p, --git-push              Commit changes and push to origin
  -b, --git-branch            Branch name
      --git-commit-user       Commit author username
      --git-commit-email      Commit author email
      --git-remote-name       Remote repo name, defualt is origin
      --git-remote-url        Remote repo URL

Archivate flags:
  -a, --archivate             Create archive of data dir
      --archive-rotate-days   Rotate archives older than N days
      --archive-type          Archive type xz, gz or bz2, default is tar

Example of use:
  $cmd dump-namespaces -n default,dev -d /mnt/dump -spa --archive-type gz

Environment variables

All environment variables are described in the .env file, you can use them both for the container launch configuration and directly from the .env file, it is read automatically at startup.

Resources default’s

All resources automatically discovered from the API if not pass as argument.

• List of namespaces
• List of default namespaced resources
• List of default cluster wide resources

Plans for further development

• Sending dumps to s3 bucket;
• Sending notifications by email and webhook;
• Git-crypt to encrypt secrets;
• Bash autocomplete.