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Jenkins: Create SSH node, using bash and curl
#!/usr/bin/env bash
set -o nounset -o errexit -o pipefail
usage() {
cat <<EOM
Usage:
$(basename $0) [OPTIONS]
$(basename $0) [ -j | --jenkins-url | -n | --node-name | -s | -d | --desc | --slave-home | -e | --executors | -sh | --ssh-host | -sp | --ssh-port
| -c | --cred-id | -l | --labels | -u | --user-id | -p | --password | -h | --help ]
Options:
-j, --jenkins-url Jenkins base URL.
-d, --desc Description.
-n, --node-name Node name.
-s, --slave-home Remote FS home.
-e, --executors No. of executors. Defaults to 1.
-sh, --ssh-host SSH host.
-sp, --ssh-port SSH port. Defaults to 22.
-c, --cred-id Credentials Id to use for SSH authentication.
-l, --labels Labels.
-u, --user-id Username for Jenkins authentication (and crumb retrieval).
-p, --password Password (or token) for Jenkins authentication (and crumb retrieval).
-h, --help Show usage.
Example:
$(basename $0) -j http://localhost:8080 -n dumb-slave-name -d node-desc -sh 127.0.0.1 -s /tmp/dumb-slave-home -c xxxx-xxxx -l dumb-slave-label -u admin -p admin
EOM
exit 1
}
# Handle opts
[[ $# == 0 ]] && usage
while [[ $# > 0 ]]
do
key="$1"
case ${key} in
-j|--jenkins-url)
JENKINS_URL="${2}"
shift
;;
-n|--node-name)
NODE_NAME="${2}"
shift
;;
-d|--desc)
DESC="${2}"
shift
;;
-s|--slave-home)
NODE_SLAVE_HOME="${2}"
shift
;;
-e|--executors)
EXECUTORS="${2}"
shift
;;
-sh|--ssh-host)
SSH_HOST="${2}"
shift
;;
-sp|--ssh-port)
SSH_PORT="${2}"
shift
;;
-c|--cred-id)
CRED_ID="${2}"
shift
;;
-l|--labels)
LABELS="${2}"
shift
;;
-u|--user-id)
USER_ID="${2}"
shift
;;
-p|--password)
PASSWORD="${2}"
shift
;;
-h|--help)
usage
;;
*)
echo "Error: Unknown arg: [${key}]"
usage
;;
esac
shift
done
# Defaults
EXECUTORS=${EXECUTORS:-1}
SSH_PORT=${SSH_PORT:-22}
DESC=${DESC:-""}
# Print values
printf "\nSelected values:\n"
_body=""
_body="${_body}\n JENKINS_URL \t: ${JENKINS_URL}"
_body="${_body}\n NODE_NAME \t: ${NODE_NAME}"
_body="${_body}\n DESC \t: ${DESC}"
_body="${_body}\n NODE_SLAVE_HOME \t: ${NODE_SLAVE_HOME}"
_body="${_body}\n EXECUTORS \t: ${EXECUTORS}"
_body="${_body}\n SSH_HOST \t: ${SSH_HOST}"
_body="${_body}\n SSH_PORT \t: ${SSH_PORT}"
_body="${_body}\n CRED_ID \t: ${CRED_ID}"
_body="${_body}\n LABELS \t: ${LABELS}"
_body="${_body}\n USER_ID \t: ${USER_ID}"
_body="${_body}\n PASSWORD \t: ${PASSWORD}"
echo "$(printf "${_body}")" | column -s $'\t' -t 2>/dev/null
# Confirm
read -r -p "Are you sure? [y/N]" response
case ${response} in
[yY][eE][sS]|[yY])
printf "\nConfirmed.\n"
;;
*)
printf "\nAborting!\n"
exit 0
;;
esac
# Check crumb
echo "Checking for CSRF..."
CRUMB=$(curl --fail -0 -u "${USER_ID}:${PASSWORD}" ''${JENKINS_URL}'/crumbIssuer/api/xml?xpath=concat(//crumbRequestField,":",//crumb)' 2>/dev/null || echo "N/A")
if [[ ${CRUMB} != "N/A" ]]; then
echo "CSRF Enabled."
else
echo "CSRF not enabled."
fi
# Create node (doCreateItem)
RESPONSE=$(curl -L -s -o /dev/null -w "%{http_code}" -u "${USER_ID}:${PASSWORD}" -H "Content-Type:application/x-www-form-urlencoded" -H "$CRUMB" -X POST -d 'json={"name": "'"$NODE_NAME"'", "nodeDescription": "'"$DESC"'", "numExecutors": "'"$EXECUTORS"'", "remoteFS": "'"$NODE_SLAVE_HOME"'", "labelString": "'"$LABELS"'", "mode": "NORMAL", "": ["hudson.plugins.sshslaves.SSHLauncher", "hudson.slaves.RetentionStrategy$Always"], "launcher": {"stapler-class": "hudson.plugins.sshslaves.SSHLauncher", "$class": "hudson.plugins.sshslaves.SSHLauncher", "host": "'"$SSH_HOST"'", "credentialsId": "'"$CRED_ID"'", "port": "'"$SSH_PORT"'", "javaPath": "", "jvmOptions": "", "prefixStartSlaveCmd": "", "suffixStartSlaveCmd": "", "launchTimeoutSeconds": "", "maxNumRetries": "", "retryWaitTime": ""}, "retentionStrategy": {"stapler-class": "hudson.slaves.RetentionStrategy$Always", "$class": "hudson.slaves.RetentionStrategy$Always"}, "nodeProperties": {"stapler-class-bag": "true"}, "type": "hudson.slaves.DumbSlave", "crumb": "'"$CRUMB"'"}' "${JENKINS_URL}/computer/doCreateItem?name=${NODE_NAME}&type=hudson.slaves.DumbSlave")
if [[ ${RESPONSE} == "200" ]]; then
echo "SUCCESS"
else
echo "ERROR: Failed to create node. Response code: [${RESPONSE}]"
exit 1
fi
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