okd/roles/openshift_bootstrap_autoapprover/files/openshift-bootstrap-controller.yaml

kind: StatefulSet
apiVersion: apps/v1beta1
metadata:
  name: bootstrap-autoapprover
  namespace: openshift-infra
spec:
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: bootstrap-autoapprover
    spec:
      serviceAccountName: bootstrap-autoapprover
      terminationGracePeriodSeconds: 1
      containers:
      - name: signer
        image: openshift/node:v3.7.0-rc.0
        command:
        - /bin/bash
        - -c
        args:
        - |
          #!/bin/bash
          set -o errexit
          set -o nounset
          set -o pipefail

          unset KUBECONFIG
          cat <<SCRIPT > /tmp/signer
          #!/bin/bash
          #
          # It will approve any CSR that is not approved yet, and delete any CSR that expired more than 60 seconds
          # ago.
          #

          set -o errexit
          set -o nounset
          set -o pipefail

          name=\${1}
          condition=\${2}
          certificate=\${3}
          username=\${4}

          # auto approve
          if [[ -z "\${condition}" && ("\${username}" == "system:serviceaccount:openshift-infra:node-bootstrapper" || "\${username}" == "system:node:"* ) ]]; then
            oc adm certificate approve "\${name}"
            exit 0
          fi

          # check certificate age
          if [[ -n "\${certificate}" ]]; then
            text="\$( echo "\${certificate}" | base64 -d - )"
            if ! echo "\${text}" | openssl x509 -noout; then
              echo "error: Unable to parse certificate" 2>&1
              exit 1
            fi 
            if ! echo "\${text}" | openssl x509 -checkend -60 > /dev/null; then
              echo "Certificate is expired, deleting"
              oc delete csr "\${name}"
            fi
            exit 0
          fi
          SCRIPT
          chmod u+x /tmp/signer

          exec oc observe csr --maximum-errors=1 --resync-period=10m -a '{.status.conditions[*].type}' -a '{.status.certificate}' -a '{.spec.username}' -- /tmp/signer