Backup and restore on AWS

java -Xbootclasspath/a:/opt/jenkins/boot-classpath/ -jar /opt/jenkins/jenkins.war
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{
  "partitions": [
    {"_comment": "OUT OF THE BOX AWS PARTITIONS ..."},

    {
      "defaults": {
        "hostname": "{service}.{region}.{dnsSuffix}",
        "protocols": [
          "https"
        ],
        "signatureVersions": [
          "v4"
        ]
      },
      "dnsSuffix": "cloud.mycompany.com",
      "partition": "mycompany",
      "partitionName": "My Company",
      "regionRegex": "^(us|eu|ap|sa|ca)\\-\\w+\\-\\d+$",
      "regions": {
        "us-mycompany-east-1": {
          "description": "My Company US East 1"
        }
      },
      "services": {
        "s3": {
          "defaults": {
            "protocols": [
              "http",
              "https"
            ],
            "signatureVersions": [
                "s3",
                "s3v4"
             ]
          },
          "endpoints": {
            "us-mycompany-east-1": {
              "hostname": "s3-us-mycompany-east-1.amazonaws.com"
            }
          }
        }
      }
    }
   ],
   "version": 3
}
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# Get the location of the $JENKINS_HOME
$ kubectl describe pod controller2-0 | grep " jenkins-home " | awk '{print $1}'
/var/jenkins_home

# Access the bash of a given pod
$ kubectl exec controller2-0 -i -t -- bash -i -l
controller2-0:/$ cd /var/jenkins_home/
controller2-0:~$ ps -ef
PID   USER     TIME   COMMAND
    1 jenkins    0:00 /sbin/tini -- /usr/local/bin/launch.sh
    5 jenkins    1:46 java -Dhudson.agents.NodeProvisioner.initialDelay=0 -Duser.home=/var/jenkins_home -Xmx1433m -Xms1433m -Djenkins.model.Jenkins.agentAgentPortEnforce=true -Djenkins.model.Jenkins.slav
  516 jenkins    0:00 bash -i -l
  524 jenkins    0:00 ps -ef
controller2-0:~$ ps -ef | grep java
    5 jenkins    1:46 java -Dhudson.agents.NodeProvisioner.initialDelay=0 -Duser.home=/var/jenkins_home -Xmx1433m -Xms1433m -Djenkins.model.Jenkins.agentAgentPortEnforce=true -Djenkins.model.Jenkins.agentAgentPort=50000 -DMASTER_GRANT_ID=270bd80c-3e5c-498c-88fe-35ac9e11f3d3 -Dcb.IMProp.warProfiles.cje=kubernetes.json -DMASTER_INDEX=1 -Dcb.IMProp.warProfiles=kubernetes.json -DMASTER_OPERATIONSCENTER_ENDPOINT=http://cjoc/cjoc -DMASTER_NAME=controller2 -DMASTER_ENDPOINT=http://cje.support-core.beescloud.k8s.local/controller2/ -jar -Dcb.distributable.name=Docker Common CJE -Dcb.distributable.commit_sha=888f01a54c12cfae5c66ec27fd4f2a7346097997 /usr/share/jenkins/jenkins.war --webroot=/tmp/jenkins/war --pluginroot=/tmp/jenkins/plugins --prefix=/controller2/
  528 jenkins    0:00 grep java

# Operations to be done. This is an example
$ kubectl cp controller2-0:/var/jenkins_home/jobs/ ./jobs/
tar: removing leading '/' from member names
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# Stop a pod
$ kubectl scale statefulset/controller2 --replicas=0
statefulset "controller2" scaled

# Create a new rescue-pod running something with any effect
# in the $JENKINS_HOME
$ cat <<EOF | kubectl create -f -
kind: Pod
apiVersion: v1
metadata:
  name: rescue-pod
spec:
  volumes:
    - name: rescue-storage
      persistentVolumeClaim:
       claimName: jenkins-home-controller2-0
  containers:
    - name: rescue-container
      image: nginx
      volumeMounts:
        - mountPath: "/tmp/jenkins-home"
          name: rescue-storage
EOF

# Access to the bash of the rescue-pod
$ kubectl exec rescue-pod -i -t -- bash -i -l
mesg: ttyname failed: Success
root@rescue-pod:/# cd /tmp/jenkins-home/
root@rescue-pod:/tmp/jenkins-home#

# Operations to be done. This is an example
$ kubectl cp rescue-pod:/tmp/jenkins_home/jobs/ ./jobs/
tar: removing leading '/' from member names

# Delete the rescue pod
$ kubectl delete pod rescue-pod
pod "rescue-pod" deleted

# Start the pod
$ kubectl scale statefulset/controller2 --replicas=1
statefulset "controller2" scaled
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