CICD :12

DevOps Classroom Series – 14/Feb/2021

Jenkins User Administration

• Enabling and disabling global security on Jenkins
  • Navigate to Manage Jenkins => Configure Global Security  
  • Authentication Methods in Jenkins are
    • Delegate to Servlet container
    • Jenkins own user database
    • LDAP: In this we configure jenkins to connect to our organizations active directory  
    • Unix user/group database
• Creating new users inside jenkins
  • Navigate to Manage Jenkins => Manage Users  
• Authorization Methods of Jenkins
  • image 
  • Anyone can do anything
  • Legacy moded: when we choos this mode Jenkins behaves the way it was before jenkins release 1.164. In Legacy mode jenkins will look for a user named Admin This user will have administrative privilege all the other users will be considered anonymous
  • Logged-in users can do anything
  • Matrix-based:
    • This is most widely used Authorization method in Jenkins  
  • Project-based Matrix Authorization Strategy

Configuring High Availability for Jenkins

• Jenkins Standalone set up looks as below 
• To configure High Availability 

Distributed Builds in Jenkins

• Lets consider the scenario as mentioned over here Refer Here 
• Now lets configure one linux system as jenkins node
  • OS: ubuntu 18 os
  • Softwares: jdk8, maven
  • user: ubuntu and password authentication is enabled
• Commands to be executed after login into ubuntu instance

sudo apt update
sudo apt install openjdk-8-jdk maven -y

• In Jenkins to configure the nodes we have to choose the authentication strategy
  • ssh     
• Now lets try to create a jenkins project which will run on node 1      
• Now lets create one more centos node
  • sofwares: jdk 11 and maven
  • OS: centos 7
  • Authentication: username and key
• Commands:

 sudo yum install java-11-openjdk git -y
 sudo yum install maven -y

• Now add a node 
• Add a credential and select ssh with private key   
• Now lets create a jenkins job to build spring petclinic on this node