I have a docker image that I'm running in my Kubernetes clusters, the image has a label tag with the repository, thats being added at build time:
docker build . --label "repo=<repo_name>" tag <tag>I have a kubenetes deployment that looks something like this:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
creationTimestamp: null
labels:
run: my-cool-app
name: my-cool-app
spec:
replicas: 1
selector:
matchLabels:
run: my-cool-app
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
run: my-cool-app
spec:
containers:
- image: <imagename>:v1
name: my-cool-app
resources: {}I'm wondering is it possible to extract the docker image label, and add that as a metadata label in my kubernetes spec?
It is not possible to extract it, but you can attach this in the deployment you used. For example if you use Helm chart, you can use one variable for metadate and for image. All you need to do, is to update the value.yaml. It might look like:
value.yaml
my-cool-app-tag: v1my-cool-app.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
creationTimestamp: null
labels:
run: my-cool-app
name: my-cool-app
spec:
replicas: 1
selector:
matchLabels:
run: my-cool-app
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
run: my-cool-app
tag-lable: {{ .value.my-cool-app-tag }}
spec:
containers:
- image: <imagename>:{{ .value.my-cool-app-tag }}
name: my-cool-app
resources: {}