Continue with part one, I will show you the details of the CICD scripts and also the Bamboo plan.
Lets start with the CICD scripts, it can be found in my OpenShift-CICD repository on GitHub. The key parts are two OpenShift configuration files: build.yaml and deploy.yaml. The script is to make a copy from the template file and inject the parameters.
#!/bin/bash
# Project name
PROJECT=dilbert
# User inputs
# Build or deploy
ACTION=$1
VERSION=$2
ENVIRONMENT=$3
TAG=$(oc -n $PROJECT get is/${PROJECT} -o jsonpath={.status.tags[1].tag})
case $ACTION in
build)
# Verson number
# Assume tags[0] is latest
if [ -z "${VERSION}" ]; then
echo Previous version is $TAG
if [ -z "$TAG" ]; then
PREVERSION=v0.1
else
PREVERSION=$TAG
fi
MAJVERSION=$(echo $PREVERSION | cut -d'.' -f1)
let MINVERSION=$(echo $PREVERSION | cut -d'.' -f2)+1
VERSION=${MAJVERSION}.${MINVERSION}
fi
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
echo "You are buliding version" $VERSION
sed -e "s/%buildversion%/${VERSION}/g" build-template.yaml > build.yaml
if [[ $(oc -n $PROJECT get bc | grep -c ${PROJECT}) -gt 0 ]]; then
oc replace -n $PROJECT -f build.yaml
else
oc create -n $PROJECT -f build.yaml
fi
BUILDNUBER=$(oc -n $PROJECT start-build ${PROJECT} | cut -d'"' -f2)
echo "The build job is" $BUILDNUBER
until [ "$BUILDSTATUS" == "Failed" ] || [ "$BUILDSTATUS" == "Complete" ] ; do
BUILDSTATUS=$(oc -n $PROJECT get build/$BUILDNUBER -o jsonpath={.status.phase})
echo $BUILDNUBER status is $BUILDSTATUS
sleep 5
done
if [ "$BUILDSTATUS" == "Failed" ]; then echo "Oops, build failed!"; exit 1; fi
if [ "$BUILDSTATUS" == "Complete" ]; then
echo "Congrats! build completed!";
oc -n $PROJECT tag ${PROJECT}:${VERSION} $PROJECT:latest
exit 0;
fi
;;
deploy)
if [ -z ${VERSION} ] || [ -z ${ENVIRONMENT} ]; then
echo "You need to specify [which version] to deploy to [which environment]!"
echo "Usage: ./pipeline.sh deploy "
exit 1
fi
if [ "${VERSION}" == "latest" ]; then VERSION=$TAG; fi
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
echo "You are deploying version "$VERSION "to" $ENVIRONMENT
sed -e "s/%buildversion%/${VERSION}/g" -e "s/%imageversion%/${VERSION}/g" -e "s/%env%/${ENVIRONMENT}/g" deploy-template.yaml > deploy.yaml
if [[ $(oc -n $PROJECT get dc | grep -c ${ENVIRONMENT}) -gt 0 ]]; then
oc replace -n $PROJECT -f deploy.yaml
else
oc create -n $PROJECT -f deploy.yaml
fi
#oc get dc/${ENVIRONMENT} -w -o jsonpath={.status.availableReplicas}
;;
*)
echo 'Usage:'
echo 'To build : ./pipeline.sh build [version]'
echo 'To deploy: ./pipeline.sh deploy '
echo 'To CI/CD: ./pipeline.sh build && ./pipeline.sh deploy latest '
exit 1
;;
esac
Bamboo plan works the same way, the only difference is that the parameters are from Bamboo plan variables. Just is a simple plan with 3 tasks.
First step, checking out the source code from repository.
Second step, ensure the oc command is installed.
#!/bin/bash
tar xvzf lib/oc.tar.gz -C ~/
export PATH=$PATH:~
oc login ${bamboo.os_url} --token=${bamboo.os_password}
The last step is the pipeline script:
#!/bin/bash
export PATH=$PATH:~
cd openshift
# Project name
PROJECT=${bamboo.project}
# User inputs
# Build or deploy
ACTION=$1
VERSION=$2
ENVIRONMENT=$3
TAG=$(oc -n $PROJECT get is/${PROJECT} -o jsonpath={.status.tags[1].tag})
case $ACTION in
build)
# Verson number
# Assume tags[0] is latest
if [ -z "${VERSION}" ]; then
echo Previous version is $TAG
if [ -z "$TAG" ]; then
PREVERSION=v0.1
else
PREVERSION=$TAG
fi
MAJVERSION=$(echo $PREVERSION | cut -d'.' -f1)
let MINVERSION=$(echo $PREVERSION | cut -d'.' -f2)+1
VERSION=${MAJVERSION}.${MINVERSION}
fi
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
echo "You are buliding version" $VERSION
sed -e "s/%buildversion%/${VERSION}/g" build-template.yaml > build.yaml
if [[ $(oc -n $PROJECT get bc | grep -c ${PROJECT}) -gt 0 ]]; then
oc replace -n $PROJECT -f build.yaml
else
oc create -n $PROJECT -f build.yaml
fi
BUILDNUBER=$(oc -n $PROJECT start-build ${PROJECT} | cut -d'"' -f2)
echo "The build job is" $BUILDNUBER
until [ "$BUILDSTATUS" == "Failed" ] || [ "$BUILDSTATUS" == "Complete" ] ; do
BUILDSTATUS=$(oc -n $PROJECT get build/$BUILDNUBER -o jsonpath={.status.phase})
echo $BUILDNUBER status is $BUILDSTATUS
sleep 5
done
if [ "$BUILDSTATUS" == "Failed" ]; then echo "Oops, build failed!"; exit 1; fi
if [ "$BUILDSTATUS" == "Complete" ]; then
echo "Congrats! build completed!"
echo ${VERSION} > VERSION
oc -n $PROJECT tag ${PROJECT}:${VERSION} $PROJECT:latest
exit 0;
fi
;;
deploy)
if [ -z ${VERSION} ] || [ -z ${ENVIRONMENT} ]; then
echo "You need to specify [which version] to deploy to [which environment]!"
echo "Usage: ./pipeline.sh deploy "
exit 1
fi
if [ "${VERSION}" == "latest" ]; then VERSION=$TAG; fi
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
echo "You are deploying version "$VERSION "to" $ENVIRONMENT
sed -e "s/%buildversion%/${VERSION}/g" -e "s/%imageversion%/${VERSION}/g" -e "s/%env%/${ENVIRONMENT}/g" deploy-template.yaml > deploy.yaml
if [[ $(oc -n $PROJECT get dc | grep -c ${ENVIRONMENT}) -gt 0 ]]; then
oc replace -n $PROJECT -f deploy.yaml
else
oc create -n $PROJECT -f deploy.yaml
fi
#oc get dc/${ENVIRONMENT} -w -o jsonpath={.status.availableReplicas}
;;
*)
echo 'Usage:'
echo 'To build : ./pipeline.sh build [version]'
echo 'To deploy: ./pipeline.sh deploy '
echo 'To CI/CD: ./pipeline.sh build && ./pipeline.sh deploy latest '
exit 1
;;
esac
Add a trigger to the plan to allow automated build when changes are committed.
Also create a associated deployment with two environments: UAT and PROD. We want UAT environment to always use the latest build automatically, but PROD needs a manual deployment only after users are happy with the UAT test.
And add a trigger for the UAT.
For PROD, I can use whichever release that I am happy with to deploy into production,
In summary, the rule of thumb is that you only build image once for each release. This ensures the same binary/ docker image that runs in different environments (dev, uat … prod). And follow the environment promotion path to deploy the binary/ docker image from dev all the way to production.
