[Jenkins] Lesson 8: example of Post in Jenkins Pipeline.

Contents

Post

https://www.jenkins.io/doc/book/pipeline/syntax/#post
post ở đây là khi bạn completed 1 Pipeline hay 1 stage thì chúng ta chạy “post” để kiểm tra cuối
Nghe vẫn khó hiểu thì bay ngay vào ví dụ.

success, failure, always

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run has a "success" status
	    success{
	        echo "post->success is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has a "failed" status
	    failure{
	        echo "post->failure is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has a "failed" status
	    always{
	        echo "post->always is called"
	    }
	}
}

Giờ ta sửa cho stages bị error

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        error("Build error")
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run has a "success" status
	    success{
	        echo "post->success is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has a "failed" status
	    failure{
	        echo "post->failure is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has a "failed" status
	    always{
	        echo "post->always is called"
	    }
	}
}

build error nên
run post always
run post failure

change

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		      //  error("Build error")
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run has a different completion status from its previous run
	    change{
	        echo "post->change is called"
	    }
	}
}

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        //error("Build error")
		        script{
		            currentBuild.result = "UNSTABLE"
		        }
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run has a different completion status from its previous run
	    changed{
	        echo "post->change is called"
	    }
	}
}

status Build UNSTABLE thì bạn sẽ thấy có dấu ! và màu vàng

giờ click lại luôn và không sửa pipeline

unstable

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        //error("Build error")
		        script{
		            currentBuild.result = "UNSTABLE"
		        }
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run has a different completion status from its previous run
	    changed{
	        echo "post->change is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has an "unstable", usually caused by test failure, code violations, etc
	    unstable{
	        echo "post->unstable is called"
	    }
	}
}

thêm post unstable thì ta sẽ có kết quả như sau

fixed

nó giống như alert OK ở hiện tại sau khi các build trước đã bị failure hay unstable

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        //error("Build error")
		      //  script{
		      //      currentBuild.result = "UNSTABLE"
		      //  }
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run is  successful and the previous run failure and was unstable
	    fixed{
	        echo "post->fixed is called"
	    }
	}
}

regression

chỉ run nếu build hiện tại failure, unstable, aborted và build trước đó thành công

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        error("Build error")
		      //  script{
		      //      currentBuild.result = "UNSTABLE"
		      //  }
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run is  failure, unstable, aborted and the previous run was successful
	    regression{
	        echo "post->regession is called"
	    }
	}
}

abored

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        //error("Build error")
		        script{
		            currentBuild.result = "ABORTED"
		        }
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run is  failure, unstable, aborted and the previous run was successful
	    aborted{
	        echo "post->aborted is called"
	    }
	}
}

cleanup

nó sẽ run sau tất cả các post và ko quan tâm đến status stages hay pipeline

pipeline{
	agent{
	    label "k8s-permanent"
	}
	stages{
		stage("Build"){
		    steps{
		        echo "Building"
		        error("Build error")
		    }
		}
	}
	post{
	    // Only runs if the current Pipeline's or stage's run has a "success" status
	    success{
	        echo "post->success is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has a "failed" status
	    failure{
	        echo "post->failure is called"
	    }
	    
	    // Only runs if the current Pipeline's or stage's run has a "failed" status
	    always{
	        echo "post->always is called"
	    }
	    
	    //Run after every other post condition has been evaluated,  regardless of the status of Pipeline or Stage
	    cleanup{
	        echo "post->cleanup is called"
	    }
	}
}