Configmapgenerator files. Upvoting indicates when questions and answers are useful. yaml └── pod1 ├── kustomization. yaml file In Kustomize, overlays layer modifications on top of base manifests to create customized versions. properties file: FOO=Bar. Here is an example of generating a ConfigMap with a data item from a . /base catalog config. name set to my-configmap, I ended up in my deployment with a translated configMapKeyRef. conf and app. json # you can Jul 21, 2021 · kustomize build . The server runs in different environments: development, testing, staging and production, accepting configuration parameters from java property files. name correctly set to dev-my-configmap-g75875hhh9 - not erroneously set to my-configmap. To generate a ConfigMap from a file, add an entry to the files list in configMapGenerator. I think you want a common properties file defined in your base, but you want to override specific properties in your overlays. com Sep 19, 2025 · Kustomize has secretGenerator and configMapGenerator, which generate Secret and ConfigMap from files or literals. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. conf). apiVersion: v1 data: a: "0" kind: ConfigMap metadata: labels: apps: a name: a-config-map-26kgmbk2md Then add these in the configMapGenerator configMapGenerator: - name: a-config-map envs: - a. The kustomization. Sep 12, 2023 · We have two files that would like to put into kubernetes pod so I will create one configmap using kustomize and mount these 2 files into kubernetes pod through configmap. Apr 27, 2025 · 🚀 Kubernetes ConfigMaps and Secrets: Automating Updates with Generators 🛠️ 📋 Tagged with kubernetes, devops, kustomization, k8s. Is there a way to achieve this? Note: Adding Issue tracker and mirror of kubectl code. yaml configMapGenerator: - name: my-config files: - myConfiguration. yaml Reference files []string List of files to generate ConfigMap data entries from. yaml Oct 14, 2024 · The role of the kustomize. The files change Jun 14, 2023 · As per this git link you can add specific labels by using patch files in kustomize. yaml file: generatorOptions: disableNameSuffixHash: true Apr 27, 2025 · Definition: A ConfigMap Generator is a feature in Kustomize (a Kubernetes configuration management tool) that creates ConfigMaps dynamically and ensures that changes to configuration data trigger redeployments. e. Kustomize provides two ways of adding ConfigMap in one kustomization, either by declaring ConfigMap as a resource or declaring ConfigMap from a ConfigMapGenerator. This will remove file name under which those key=value pairs are present. ) contribute to. yml Next I create in . properties files (as shown in your examples) and also works with literals. /kustomization. You create a resource generator using Kustomize, which generates a Secret that you can apply to the API server using kubectl. Here's one way of doing that. yaml file guides this process, listing the base resources and applying the specified overlays. ├── example. Right now there is only the option to include individual files (unless I missed Jul 19, 2024 · kubectl supports using the Kustomize object management tool to manage Secrets and ConfigMaps. This is not flattening. Contribute to openshift/kubernetes-kubectl development by creating an account on GitHub. See discussion around that feature in comment on "configMapGenerator should allow directories as input" The main reason: To move towards explicit dependency declaration, we're moving away from allowing globs in the kustomization file Dec 23, 2021 · $ cat kustomization. If you don't want this behavior, you can add the following to your kustomization. Is there no way to do this? It works with . yaml and your configMap's name is my-config, then the kustomization. properties ├── kustomization. Mar 7, 2021 · I removed namespace from all files except from the base kustomization. Let see how to generate each configMapGenerator. It provides a way to define and manage multiple variations of Kubernetes object configurations, Mar 7, 2021 · The reason for this is so that if you change the configMap, Kustomize generates a new hash and updates the Deployment, causing a rolling restart of the Pods. file and it solved the problem. Sep 24, 2018 · Hello, i'd like to merge a splitted configuration file in a configmap to a single file again. configMapGenerator: - name: promethe Feb 3, 2023 · Why is this needed? for producing . EOF cat <<EOF >. In base, I have: $ cd base $ tree . d folders like the one above where you can just drop in new config files and be done with it. You have to put the contents of the file in a yaml manifest, get the indentation right, etc. Jul 11, 2023 · I know that I can use Kustomize's configMapGenerator to create a configmap from a file that resides in the same Git repository as the "kustomization. . Using one big properties file for each environment is difficult to manage. Apr 28, 2024 · The configMapGenerator allows you to generate ConfigMaps from a set of files or literal key-value pairs. Files that can reproduce the issue kustomization. Feb 6, 2022 · If I understand your goal correctly, I think you may be grossly over-complicating things. I would love to be able to do that with configMapGenerator as well. So that all the resources i used produce a single file in the map. Why can't it work with yaml from a file? Mar 27, 2023 · ConfigMapGenerator Creating ConfigMap s is a bit of a pain, particularly when you want to create it from a file. This is quite useful when you have . It is recommended to run this Sep 10, 2020 · How can I achieve what I'm trying to do? I get that the configMapGenerator creates a literal with the filename as the data value, and then its just a string, I guess. yaml file, with configMapGenerator[0]. k8s. config. If you want simple flat output as you showed, you should use literals: configMapGenerator: - name: the-map literals: - FIRST: 1 - SECOND: 2 - LAST: 3 This is explained on # Kustomization. fails with some conflict errors for finding multiple objects: Error: merging from generator <blah>: found multiple objects <blah> that could accept merge of ~G_v1_ConfigMap|~X|env-cm Unfortunately I need to use merge on the top-level configMapGenerator, since there are some labels injected to 1 and 2 configmaps (so create ing a top-level configmap altho addresses the env-vars May 17, 2020 · I've actually used a very similar approach but using the env single env file option for configMapGenerator instead of of the list of files you seem to be able to supply with envs. What's reputation and how do I get it? Instead, you can save this post to reference later. This can be seen as stacking changes on a temporary copy of the original manifest, resulting in a customized version that can be applied to Samples As ConfigMapGenerator support files: and literals:, KustomizeConfigMapGenerator also support this 2 cases. dry run with simple files:. properties files that can be mounted as volumes directly in the configMapGenerator Can you accomplish the motivating task without this feature, and if so, how? By using traditional ConfigMaps instead of using a configMapGenerator What other solutions have you considered? I have also tried something like the following yamls: defining the same file multiple Aug 25, 2020 · So if your deployment yaml file is deployment. Wouldn’t it be easier if something would just take your file and create the ConfigMap for you? Kustomize does exactly that! Scenario: you have a Java-based server storefront in production that various internal development teams (signups, checkout, search, etc. properties patchesStrategicMerge: - patch-a. ssl. ConfigMaps are commonly used to store non-sensitive configuration data that can be consumed Jul 21, 2018 · This creates a configmap containing all first level files from the configs/ folder (i. Apr 24, 2023 · With Kubernetes’ Kustomize we can customize objects like Deployments, Services, and ConfigMaps. Apr 14, 2021 · Nope. yaml" file. Each item should be a path Aug 2, 2024 · The file itself can be seen a collection of optional ordered processes: resources, generators, transformers, validators, configMapGenerator, patches and so on. In the base kustomization. yml contains my application config: Jul 22, 2019 · I'm trying to set multiline values (contents of a ca certificate file) to kustomize environment file for a particular key as displayed in the code below. We wont dive too deep into these but look at a specific way of using the transformer property to use configuration values (as environment variables) from a file to drive your configuration. yaml should look something like this apiVersion: kustomize. yaml. See full list on devopscube. yaml This will add the specific label to individual configMaps to the Nov 23, 2022 · apiVersion: kustomize. yaml configMapGenerator: - name: config-app files: - config. json - myConfiguration2. You'll need to complete a few actions and gain 15 reputation points before being able to upvote. io/v1beta1 kind: Kustomization resources: - deployment. env generatorOptions: disableNameSuffixHash: true # use a static name disableNameSuffixHash - disable appending a content hash suffix to the names of generated resources, see generator options. yaml Describe the bug When an extra space is at the end of the line in a reference file to a configMapGenerator it will create a single line string with "\n" instead of a multiline string. yaml configMapGenerator: - name: frontend-configmap files: # using files here as we want to create a whole file - . bko8 0fmb kyd hjbbjvn wfirbu ncy e29fc n1qr2bvu kqfqmsi ggqml