Credential types and storage in Jenkins - Mini Project: Build & Apply

Credential Types and Storage in Jenkins

📖 Scenario: You are setting up Jenkins to securely store credentials needed for your build jobs. Jenkins supports different types of credentials like username/password, secret text, and SSH keys. Properly storing and using these credentials helps keep your automation safe.

🎯 Goal: Learn how to create and store different credential types in Jenkins using the Jenkinsfile syntax. You will define credentials, configure their types, and then use them in a simple Jenkins pipeline.

📋 What You'll Learn

Create a credentials dictionary with exact credential IDs and types

Add a configuration variable for the default credential ID

Write a Jenkins pipeline snippet that uses the stored credential

Print the credential ID used in the pipeline

💡 Why This Matters

🌍 Real World

Jenkins pipelines often need to access external systems like Git, Docker registries, or cloud providers. Storing credentials securely and using them in pipelines is essential to protect sensitive data.

💼 Career

Understanding Jenkins credential types and storage is a key skill for DevOps engineers and automation specialists to maintain secure CI/CD pipelines.

1

Create a dictionary of Jenkins credentials

Create a dictionary called credentials with these exact entries: 'cred1': 'usernamePassword', 'cred2': 'secretText', 'cred3': 'sshUserPrivateKey'.

Jenkins

# Your code here

Need a hint?

Use a Python dictionary with keys as credential IDs and values as their types.

2

Add a default credential ID variable

Add a variable called default_cred and set it to the string 'cred2'.

Jenkins

credentials = {
    'cred1': 'usernamePassword',
    'cred2': 'secretText',
    'cred3': 'sshUserPrivateKey'
}
# Your code here

Need a hint?

Just assign the string 'cred2' to a variable named default_cred.

3

Write a Jenkins pipeline snippet using the default credential

Write a variable called pipeline_snippet that contains this exact string: withCredentials([string(credentialsId: default_cred, variable: 'SECRET')]) { echo "Using credential: ${SECRET}" }.

Jenkins

credentials = {
    'cred1': 'usernamePassword',
    'cred2': 'secretText',
    'cred3': 'sshUserPrivateKey'
}
default_cred = 'cred2'
# Your code here

Need a hint?

Use double quotes and escape inner quotes properly to match the exact string.

4

Print the Jenkins pipeline snippet

Write a print statement to display the value of pipeline_snippet.

Jenkins

credentials = {
    'cred1': 'usernamePassword',
    'cred2': 'secretText',
    'cred3': 'sshUserPrivateKey'
}
default_cred = 'cred2'
pipeline_snippet = "withCredentials([string(credentialsId: default_cred, variable: 'SECRET')]) { echo \"Using credential: ${SECRET}\" }"
# Your code here

Need a hint?

Use print(pipeline_snippet) to show the pipeline snippet.