Recover a Deleted Commit
- Commit 3 is deleted
- Check the reflog
Fork
- This is a Git Server Repository Feature
- Fork is used to create a local copy of the repository where you don’t have permissions.
- Refer Here for the repository owned by someone else
Pull Request
- Once you fork the repository and make changes, then pull request is a way so that we can send our local changes to the actual repository.
- Actual Repository admin, can review you pull request and merge if required, reject if not.
- Now we have create a fork and commited a change in the forked repository
-
Now lets create the pull request to send the changes for approval to the original repo owner
- Now the actual repo owner recieves a pull request
CI/CD Pipeline
- CI/CD Pipeline
Jenkins CI/CD Engine
- Jenkins is a CI/CD Engine which can be used to create pipelines.
- Jenkins is developed in JAVA language, so jenkins requires JAVA installation on the servers.
- Jenkins is CRON (Scheduler) on Steriods developed for CI/CD Purposes.
Installing Jenkins
- Lab Setup: Jenkins Master
- For installing Jenkins Refer Here
- For now lets create an ubuntu VM (free tier) & for installing refer here Refer Here
- Ensure 22 and 8080 ports are open
- Install java 11 (openjdk11)
# ubuntu
sudo apt-cache search openjdk
sudo apt install openjdk-11-jdk -y
#redhat
sudo yum search openjdk
- Use the commands from the documentation
curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo tee \
/usr/share/keyrings/jenkins-keyring.asc > /dev/null
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
- Now navigate to
http://<public-ip>:8080
- Now select install selected plugins
- Now as discussed in the class create a free style jenkins project (job) with 2 commands in build steps => invoke shell
whoami
pwd
* Verify /etc/passwd on jenkins master
* Observations:
* A user with name jenkins and home directory /var/lib/jenkins got created.
* Jenkins UI is as good as linux user jenkins and the permissions which jenkins user has.
* Experiment 2:
* Lets execute sudo apt update in the build step along with whoami and pwd
* Add jenkins to the visudo with no password and rerun the build then it will work.
* Experiment 3:
* Lets build a java code spring pet clinic Refer Here
* Softwares required to perform build
* git
* java 11
* maven
* Commands
git clone https://github.com/spring-projects/spring-petclinic.git
cd spring-petclinic
mvn package
* Execute the build
*
