30893b0184
* feat: add new command 'edit set configmap' * Add a new command 'edit set configmap' to allow editing the values of an already-existing configmap in a kustomization file. * Add tests to validate the new feature. * fix: add tests, minor refactoring to use constants * Include tests to validade the new function ValidateSet, included to do necessary validations when running the 'kustomize edit set configmap' command. * Minor refactorings to use the existing constants in the 'edit set configmap' command. * Add dashes before each item in the comment explaining how ExpandFileSource() works so IDEs don't try to reformat the list and remove the indentation in it. * Because this change mutates the list of literal sources, ensure that both add and set save the resulting list in a predictable order to make it easier to check when new items are added/removed and aid in testing. * Since literal sources are the only bit that's important in this test, verify that the literal sources in the actual result is equal to what we expected it to be. * fix: change format to print resource name Use '%q' formatter instead of '%s' to print resource name Co-authored-by: Varsha <varshaprasad96@gmail.com> * fix: add changes from code review * Unexport constant that is used only in the scope of a single function. * Add extra validation to ensure format is correct with one single '=' per key-value pair. * Add extra set of tests to validate format. * Update test case to match new printed format in the error message. * fix: rollback sort for edit add/set configmap * chore: rename test package and unexport functions Rename the test package from set_test back to set and unexport functions that do not need to be exported anymore for testing purposes. * feat: handle empty and default namespace as equal Handle the empty and the default namespaces as equal. Add tests to validate this scenario. --------- Co-authored-by: Varsha <varshaprasad96@gmail.com>
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 edited text.
This tool is sponsored by sig-cli (KEP).
kubectl integration
To find the kustomize version embedded in recent versions of kubectl, run kubectl version:
> kubectl version --short --client
Client Version: v1.26.0
Kustomize Version: v4.5.7
The kustomize build flow at v2.0.3 was added to kubectl v1.14. The kustomize flow in kubectl remained frozen at v2.0.3 until kubectl v1.21, which updated it to v4.0.5. It will be updated on a regular basis going forward, and such updates will be reflected in the Kubernetes release notes.
| Kubectl version | Kustomize version |
|---|---|
| < v1.14 | n/a |
| v1.14-v1.20 | v2.0.3 |
| v1.21 | v4.0.5 |
| v1.22 | v4.2.0 |
| v1.23 | v4.4.1 |
| v1.24 | v4.5.4 |
| v1.25 | v4.5.7 |
| v1.26 | v4.5.7 |
| v1.27 | v5.0.1 |
For examples and guides for using the kubectl integration please see the kubernetes documentation.
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: kustomization + resources
kustomization.yaml deployment.yaml service.yaml
+---------------------------------------------+ +-------------------------------------------------------+ +-----------------------------------+
| apiVersion: kustomize.config.k8s.io/v1beta1 | | apiVersion: apps/v1 | | apiVersion: v1 |
| kind: Kustomization | | kind: Deployment | | kind: Service |
|.commonLabels: | | metadata: | | metadata: |
| app: myapp | | name: myapp | | name: myapp |
| resources: | | spec: | | spec: |
| - deployment.yaml | | selector: | | selector: |
| - service.yaml | | matchLabels: | | app: myapp |
| configMapGenerator: | | app: myapp | | ports: |
| - name: myapp-map | | template: | | - port: 6060 |
| literals: | | metadata: | | targetPort: 6060 |
| - KEY=value | | labels: | +-----------------------------------+
+---------------------------------------------+ | app: myapp |
| spec: |
| containers: |
| - name: myapp |
| image: myapp |
| resources: |
| limits: |
| memory: "128Mi" |
| cpu: "500m" |
| ports: |
| - containerPort: 6060 |
+-------------------------------------------------------+
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: kustomization + patches
kustomization.yaml replica_count.yaml cpu_count.yaml
+-----------------------------------------------+ +-------------------------------+ +------------------------------------------+
| apiVersion: kustomize.config.k8s.io/v1beta1 | | apiVersion: apps/v1 | | apiVersion: apps/v1 |
| kind: Kustomization | | kind: Deployment | | kind: Deployment |
| commonLabels: | | metadata: | | metadata: |
| variant: prod | | name: myapp | | name: myapp |
| resources: | | spec: | | spec: |
| - ../../base | | replicas: 80 | | template: |
| patches: | +-------------------------------+ | spec: |
| - path: replica_count.yaml | | containers: |
| - path: cpu_count.yaml | | - name: myapp |
+-----------------------------------------------+ | resources: |
| limits: |
| memory: "128Mi" |
| cpu: "7000m" |
+------------------------------------------+
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, referring 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
Code of conduct
Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.