devops-handson

Creating a new server.

• Goto - https://portal.azure.com/#home
• Create New VM
  • Give new resoure group name (hint: use your name as the resource group name)
  • Provide virtual machine name (hint: use your name as the machine name)
  • Region select West Europe
  • Image select Cento7.5
  • Size D2s V3
  • Setup username and password
  • Allow public inbound ports http, ssh, 8080,8081

Setting up Centos 7 Server.

sudo su # switch to root user
yum install -y epel-release; yum install -y htop wget vim mlocate git
yum install -y java-1.8.0-openjdk-devel
wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
yum install -y jenkins
systemctl start jenkins
systemctl enable jenkins

• Browsing jenkins url and setting up default plugins is taking 7 to 8 mins.

wget https://storage.googleapis.com/golang/go1.12.5.linux-amd64.tar.gz
tar -zxvf go1.12.5.linux-amd64.tar.gz -C /usr/local
exit # to exit from root user

Steps for manualy deployment.

• git clone https://github.com/gskrscm/devops-handson.git
• cd devops-handson
• mkdir bin
• Execute below commands to make go available as command.

 export GOROOT=/usr/local/go
 export PATH=$PATH:/usr/local/go/bin
 export GOBIN=/home/<user-name>/devops-handson/bin 

• go version
• go install app/app.go
• cd bin; ls
• ./app
• ctrl/cmd + c

Jenkins job

• Create new jenkins job
• Configure git url
• In build step, add bash and add below script

export GOROOT=/usr/local/go
export PATH=$PATH:/usr/local/go/bin
export GOBIN=$WORKSPACE/bin

# Build 
go version
go install $WORKSPACE/app/app.go

# Deployment
if pgrep app; then pkill app; fi
BUILD_ID=dontKillMe nohup $WORKSPACE/bin/app>>app.log & 
echo Deployment successful. 

Enhance jenkins job with build trigger

• Configure jenkins job and select poll scm in build triggers.

Voice over : Show sample jenkins job with Jenkinfile, nexus and sonar.

Broken code demo.

• Modify app/app.go eg: remove f letter from fmt.println

Next Steps to learn more jenkins and CI and CD.

• Refer: https://jenkins.io/doc/book/pipeline/getting-started/