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The ConfigMap API resource holds key-value pairs of the configuration data that can be consumed by pods or used to store configuration data for system components such as controllers. ConfigMap is similar to Secrets, but designed to more conveniently support working with strings that do not contain sensitive information.
Add ConfigMapto add a config map to your application.
You can configure a configmap in two ways-
(a) Using data type Kubernetes ConfigMap
(b) Using data type Kubernetes External ConfigMap
1. Data Type
Select the Data Type as
Kubernetes ConfigMap, if you wish to use the ConfigMap created by Devtron.
Provide a name to your configmap.
3. Use ConfigMap as
Here we are providing two options, one can select any of them as per your requirement
Environment Variableas part of your configMap or you want to add
Data Volumeto your container using Config Map.
- Environment Variable
Select this option if you want to add Environment Variables as a part of configMap. You can provide Environment Variables in key-value pairs, which can be seen and accessed inside a pod.
- Data Volume
Select this option if you want to add a
Data Volumeto your container using the Config Map.
Key-value pairs that you provide here, are provided as a file to the mount path. Your application will read this file and collect the required data as configured.
Datasection, you provide your configmap in key-value pairs. You can provide one or more than one environment variable.
You can provide variables in two ways-
- YAML (raw data)
- GUI (more user friendly)
Once you have provided the config, You can click on any option-
GUIto view the key and Value parameters of the ConfigMap.
Kubernetes ConfigMap using Environment Variable:
If you select
Environment Variablein 3rd option, then you can provide your environment variables in key-value pairs in the
Data in YAML(please Check below screenshot)
Now, Click on
Save ConfigMapto save your configmap configuration.
Kubernetes ConfigMap using Data Volume
Provide the Volume Mount folder path in Volume Mount Path, a path where the data volume needs to be mounted, which will be accessible to the Containers running in a pod.
You can add Configuration data as in YAML or GUI format as explained above.
You can click on
GUIto view the key and Value parameters of the ConfigMap that you have created.
You can click on
Save ConfigMapto save the configMap.
For multiple files mount at the same location you need to check sub path bool field, it will use the file name (key) as sub path. Sub Path feature is not applicable in case of external configmap.
File permission will be provide at the configmap level not on the each key of the configmap. It will take 3 digit standard permission for the file.
You can select
Kubernetes External ConfigMapin the
data typefield if you have created a ConfigMap using the kubectl command.
By default, the data type is set to
Kubernetes External ConfigMap is created using the
kubectl create configmapcommand. If you are using
Kubernetes External ConfigMap, make sure you give the name of ConfigMap the same as the name that you have given using kubectl create
Configmap <configmap-name> <data source>command, otherwise, it might result in an error during the built.
You have to ensure that the External ConfigMap exists and is available to the pod.
The config map is created.
You can update your configmap anytime later but you cannot change the name of your configmap. If you want to change the name of the configmap then you have to create a new configmap. To update configmap, click on the configmap you have created make changes as required.
Update Configmapto update your configmap.
You can delete your configmap. Click on your configmap and click on the
delete signto delete your configmap.