DevOps Classroom notes 19/Nov/2023

Git Contd

Git Remote Repository

• Fourth area of git
  
• A git local repository can connect to multiple remote repositories
• Each remote repository will have a name, by default when we perform clone operation, the name of remote is origin
• Clone gets a copy of remote into local repository
• in your local repo we will a branch called as main where we can work and in addition to this a branch will be created called as origin/main which represents the remote repo
• Condition: When we are sending commits to remote repo. The latest commit id on origin/main and actual remote should be same
  
• PUll = Fetch + Merge
• To get remote changes without adding extra commits prefer git pull --rebase
• upstream: Default remote repository
• GitHub Repo:
  • SSH Configuration: Settings => Ssh keys => Add a new ssh key
• We have understood how to work on multiple remotes

Explain

• Git clone vs pull
• Git pull vs pull –rebase
• Git bare repository
• Git mirror
• Forking in Github

Activities

• Configure your github account to use ssh key of your laptop
• Create a local git repo called as notes and push it to github private repo called as notes in your account.
• Create a new repository in github called as hello-remote
  • Explain git pull vs git pull –rebase
  • push a new branch
• Create a linux vm and install git and ensure you have done atleast 10 questions before next session Refer Here

Jenkins installation

• Install jdk 17

sudo apt update
sudo apt install openjdk-17-jdk -y

• Installing jenkins: Refer Here

sudo wget -O /usr/share/keyrings/jenkins-keyring.asc \
  https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key
echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \
  https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null
sudo apt-get update
sudo apt-get install jenkins -y

• Jenkins runs on port 8080 by default
• Once we install jenkins a user called as jenkins is created
• Navigate to http://<public-ip>:8080
• Enter the initialAdmin password

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

• Install selected plugins
• Create a admin user