kustomize

command module
Version: v1.0.11 Latest Latest
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Published: Nov 29, 2018 License: Apache-2.0 Imports: 3 Imported by: 0

README

kustomize

kustomize lets you customize raw, template-free YAML files for multiple purposes, leaving the original YAML untouched and usable as is.

kustomize targets kubernetes; it understands and can patch kubernetes style API objects. It's like make, in that what it does is declared in a file, and it's like sed, in that it emits editted text.

This tool is sponsored by sig-cli (KEP).

Build Status Go Report Card

Installation: Download a binary from the release page, or see these install notes. Then try one of the tested examples.

Usage

1) Make a kustomization file

In some directory containing your YAML resource files (deployments, services, configmaps, etc.), create a kustomization file.

This file should declare those resources, and any customization to apply to them, e.g. add a common label.

base image

File structure:

~/someApp
├── deployment.yaml
├── kustomization.yaml
└── service.yaml

The resources in this directory could be a fork of someone else's configuration. If so, you can easily rebase from the source material to capture improvements, because you don't modify the resources directly.

Generate customized YAML with:

kustomize build ~/someApp

The YAML can be directly applied to a cluster:

kustomize build ~/someApp | kubectl apply -f -
2) Create variants using overlays

Manage traditional variants of a configuration - like development, staging and production - using overlays that modify a common base.

overlay image

File structure:

~/someApp
├── base
│   ├── deployment.yaml
│   ├── kustomization.yaml
│   └── service.yaml
└── overlays
    ├── development
    │   ├── cpu_count.yaml
    │   ├── kustomization.yaml
    │   └── replica_count.yaml
    └── production
        ├── cpu_count.yaml
        ├── kustomization.yaml
        └── replica_count.yaml

Take the work from step (1) above, move it into a someApp subdirectory called base, then place overlays in a sibling directory.

An overlay is just another kustomization, refering to the base, and referring to patches to apply to that base.

This arrangement makes it easy to manage your configuration with git. The base could have files from an upstream repository managed by someone else. The overlays could be in a repository you own. Arranging the repo clones as siblings on disk avoids the need for git submodules (though that works fine, if you are a submodule fan).

Generate YAML with

kustomize build ~/someApp/overlays/production

The YAML can be directly applied to a cluster:

kustomize build ~/someApp/overlays/production | kubectl apply -f -

Community, discussion, contribution, and support

Learn how to engage with the Kubernetes community on the community page.

You can reach the maintainers of this project at:

Code of conduct

Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.

Documentation

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There is no documentation for this package.

Source Files

Directories

Path Synopsis
Package k8sdeps provides kustomize factory with k8s dependencies
Package k8sdeps provides kustomize factory with k8s dependencies
configmapandsecret
Package configmapandsecret generates configmaps and secrets per generator rules.
Package configmapandsecret generates configmaps and secrets per generator rules.
kunstruct
Package kunstruct provides unstructured from api machinery and factory for creating unstructured Package kunstruct provides unstructured from api machinery and factory for creating unstructured
Package kunstruct provides unstructured from api machinery and factory for creating unstructured Package kunstruct provides unstructured from api machinery and factory for creating unstructured
transformer
Package transformer provides transformer factory
Package transformer provides transformer factory
validator
Package validator provides functions to validate labels, annotations, namespace using apimachinery
Package validator provides functions to validate labels, annotations, namespace using apimachinery
pkg
commands
Package commands holds the CLI glue mapping textual commands/args to method calls.
Package commands holds the CLI glue mapping textual commands/args to method calls.
constants
Package constants holds global constants for the kustomize tool.
Package constants holds global constants for the kustomize tool.
expansion
Package expansion provides functions find and replace $(FOO) style variables in strings.
Package expansion provides functions find and replace $(FOO) style variables in strings.
fs
Package fs provides a file system abstraction layer.
Package fs provides a file system abstraction layer.
gvk
ifc
Package ifc holds miscellaneous interfaces used by kustomize.
Package ifc holds miscellaneous interfaces used by kustomize.
ifc/transformer
Package patch holds miscellaneous interfaces used by kustomize.
Package patch holds miscellaneous interfaces used by kustomize.
loader
Package loader has a data loading interface and various implementations.
Package loader has a data loading interface and various implementations.
resmap
Package resmap implements a map from ResId to Resource that tracks all resources in a kustomization.
Package resmap implements a map from ResId to Resource that tracks all resources in a kustomization.
resource
Package resource implements representations of k8s API resources as "unstructured" objects.
Package resource implements representations of k8s API resources as "unstructured" objects.
target
Package target implements state for the set of all resources being customized.
Package target implements state for the set of all resources being customized.
transformers
Package transformers has implementations of resmap.ResMap transformers.
Package transformers has implementations of resmap.ResMap transformers.
transformers/config
Package config provides the functions to load default or user provided configurations for different transformers
Package config provides the functions to load default or user provided configurations for different transformers
transformers/config/defaultconfig
Package defaultconfig provides the default transformer configurations
Package defaultconfig provides the default transformer configurations
types
Package types holds struct definitions that should find a better home.
Package types holds struct definitions that should find a better home.
validators
Package validators defines a FakeValidator that can be used in tests
Package validators defines a FakeValidator that can be used in tests

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