CODEWITHSUNDEEP
kubernetes
Jeremy
Jeremy

Reputation: 113

error converting YAML to JSON: yaml: line 30: found unknown escape character

When I want to run the following YAML file, I get the following error: error converting YAML to JSON: yaml: line 30: found unknown escape character

kind: Deployment
apiVersion: apps/v1beta2
metadata:
  labels:
    run: $DEPLOYMENT_NAME
  name: $DEPLOYMENT_NAME
  namespace: default
spec:
  replicas: 2
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      run: $TEMPLATE_LABEL
  template:
    metadata:
      labels:
        run: $TEMPLATE_LABEL
    spec:
      containers:
      - name: wapp
        image: $IMAGE_WCE
        lifecycle:
          postStart:
            exec:
              command: ["/bin/sh", "-c", "sed -i $a\-Djdk.tls.rejectClientInitiatedRenegotiation=true /opt/app/a.ini"]

I think it is the command caused the error. 

sed -i $a\\-Djdk.tls.rejectClientInitiatedRenegotiation=true /opt/app/a.ini

Upvotes: 9

Views: 17270

Answers (2)

hariK
hariK

Reputation: 3059

You have to add an additional \ character to escape \ in command. Also, replace $ values in your manifest. Btw, the file has only 25 lines.

command: ["/bin/sh", "-c", "sed -i $a\\-Djdk.tls.rejectClientInitiatedRenegotiation=true /opt/app/a.ini"]

$ cat deploy.yml 
kind: Deployment
apiVersion: apps/v1beta2
metadata:
  labels:
    run: busybox
  name: busybox
  namespace: default
spec:
  replicas: 2
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      run: busybox
  template:
    metadata:
      labels:
        run: busybox
    spec:
      containers:
      - name: wapp
        image: busybox
        lifecycle:
          postStart:
            exec:
              command: ["/bin/sh", "-c", "sed -i $a\\-Djdk.tls.rejectClientInitiatedRenegotiation=true /opt/app/a.ini"]

$ kubectl apply -f deploy.yml 
deployment.apps/busybox created

Upvotes: 4

shaftdiesel
shaftdiesel

Reputation: 506

I think the problem is the \- in your sed command. Just looking at the yaml spec, if you use double-quotes you have to escape the backslash, ie: \\- but what about using single-quotes?

Upvotes: 22

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