将YAML转换为JSON时出错：yaml：第30行：发现未知的转义字符

当我想运行以下YAML文件时，出现以下错误：将YAML转换为JSON时出错：yaml：第30行：发现未知的转义字符

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"]

我认为这是导致错误的命令。

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