We're using Tekton as our CI/CD solution and want to replace the value of {{DASHBOARD_HOST}} inside our pipeline-run.yml, which looks like this:
apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
generateName: buildpacks-test-pipeline-run-
spec:
serviceAccountName: buildpacks-service-account-gitlab # Only needed if you set up authorization
pipelineRef:
name: buildpacks-test-pipeline
workspaces:
- name: source-workspace
subPath: source
persistentVolumeClaim:
claimName: buildpacks-source-pvc
- name: cache-workspace
subPath: cache
persistentVolumeClaim:
claimName: buildpacks-source-pvc
- name: maven-repo-cache
subPath: maven-repo-cache
persistentVolumeClaim:
claimName: buildpacks-source-pvc
params:
- name: IMAGE
value: registry.gitlab.com/jonashackt/microservice-api-spring-boot # This defines the name of output image
- name: REPO_PATH_ONLY
value: jonashackt/microservice-api-spring-boot
- name: SOURCE_REVISION
value: 3c4131f8566ef157244881bacc474543ef96755d
- name: DASHBOARD_PORT
value: 8765
- name: DASHBOARD_HOST
value: {{DASHBOARD_HOST}}We tried to use the approach with sed described in this so answer:
DASHBOARD_HOST=http://abd1c6f-123246.eu-central-1.elb.amazonaws.com
sed "s/{{DASHBOARD_HOST}}/$DASHBOARD_HOST/g" pipeline-run.yml | kubectl apply -f -but get the following error:
bad flag in substitute command: '/'Any idea on how to use sed to substitute the {{DASHBOARD_HOST}} variable?
The variable you want to replace contains slashes - and sed "s/{{DASHBOARD_HOST}}/$DASHBOARD_HOST/g" tells sed to use / as the delimiter. This produces the error. But as sed s command can use any character as a delimiter, we could optimize the solution using s# instead of s/ like this:
sed "s#{{DASHBOARD_HOST}}#$DASHBOARD_HOST#g" app-deployment.yaml | kubectl apply -f -We can also ommit the cat as stated by gertvdijk since sed is able to read files on it's own. The variable we want to replace inside the app-deployment.yaml could look somehow like this:
...
params:
- name: DASHBOARD_HOST
value: {{DASHBOARD_HOST}}
...Using sed you can even replace multiple variables in your yaml file. Let's assume your app-deployment.yaml has the following contents:
...
params:
- name: DASHBOARD_HOST
value: {{DASHBOARD_HOST}}
- name: DASHBOARD_PORT
value: {{DASHBOARD_PORT}}
...
Now set both variables inside your shell:
DASHBOARD_HOST=http://abd1c6f-123246.eu-central-1.elb.amazonaws.com
DASHBOARD_PORT=9785And then chain the sed s# commands using ; like this:
sed "s#{{DASHBOARD_HOST}}#$DASHBOARD_HOST#g;s#{{DASHBOARD_PORT}}#$DASHBOARD_PORT#g" app-deployment.yaml | kubectl apply -f -