100 Days of DevOps- Day 77

KodeKloud Engineer
#1

I have attempted this task more than 7 times. My jenkins job builds successfully, the website is deployed. And I can access the site. However on checking the lab, it fails with the error “LB did not serve deployed file.” Please help.

100 Days of DevOps- Day 77
#2

Can you please give me a bit more detail as to what you tried? What does your Jenkins job look like? Please post it in a

code block

like this to prevent your code from getting corrupted by Discourse’s edit widget.

#3

Hello Rob,

Thanks for responding.

Here are the steps I performed for the task:

  1. Jenkins Node Configuration
  • Created a slave node named App Server 1
  • Label: stapp01
  • Remote root directory: /home/sarah/jenkins_agent
  • Node status shows in sync
  1. Repository Setup
    I cloned the repository web_app on App Server 1 under: /var/www/html/web_app

Ownership:
Changed ownership using the command below:
sudo chown -R sarah:sarah /var/www/html/web_app

  1. Enabled Passwordless sudo for user sarah
  • sudo visudo
  • sarah ALL=(ALL) NOPASSWD: ALL
  1. Jenkins Pipeline Job
    Created a pipeline job named xfusion-webapp-job(not multibranch).

Pipeline script is attached

pipeline {
    agent { label 'stapp01' }

    stages {
        stage('Deploy') {
            steps {
                sh '''
                sudo cp -r /var/www/html/web_app/* /var/www/html/
                '''
            }
        }
    }
}
  1. Build Result
    The build completes successfully:

Finished: SUCCESS

  1. Verification
  • Accessing the App button loads the website successfully.
  • The page displays:
    Welcome to xFusionCorp Industries!
  1. Issue
    Despite successful deployment and the website being accessible through the Load Balancer URL, the lab validation fails with:
    LB did not serve deployed file

I have repeated the task multiple times with the same result.

Please let me know if there is any specific validation requirement I might be missing.

Thank you.

#4

You probably should not be using sudo, since that would (1) require a password, and (2) be unnecessary since the agent is running as user sarah if you set up correctly.

Note the following on App Server 1:

[tony@stapp01 ~]$ sudo -i
[root@stapp01 ~]# ls -l /home/sarah/
total 4
drwxr-xr-x 2 sarah sarah 4096 Mar 31 19:33 jenkins_agent
[root@stapp01 ~]# ls -l /var/www/
total 8
drwxr-xr-x 2 root  root  4096 Feb 12 19:09 cgi-bin
drwxr-xr-x 1 sarah sarah 4096 Mar 31 19:33 html
[root@stapp01 ~]# ls -l /var/www/html/
total 4
-rw-r--r-- 1 sarah sarah 35 Mar 31 19:33 index.html
[root@stapp01 ~]# su - sarah
Last login: Tue Mar 31 19:33:17 UTC 2026
[sarah@stapp01 ~]$ cd /var/www/html/
[sarah@stapp01 html]$ git status
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean
[sarah@stapp01 html]$ git remote -v
origin  http://sarah:Sarah_pass123@gitea:3000/sarah/web_app.git (fetch)
origin  http://sarah:Sarah_pass123@gitea:3000/sarah/web_app.git (push)
[sarah@stapp01 html]$ git pull origin master
From http://gitea:3000/sarah/web_app
 * branch            master     -> FETCH_HEAD
Already up to date.

And the pipeline script:

pipeline {
    agent { label 'stapp01' }

    stages {
        stage('Deploy') {
            steps {
                script {
                    sh '''
                        cd /var/www/html
                        git pull origin master
                    '''
                }
            }
        }
    }
}
#5

Thank you. This worked.

What I was doing wrong: I was cloning the repo first then on the pipeline:
sudo cp -r /var/www/html/web_app/* /var/www/html/

What solved the issue: In the pipeline I used:

cd /var/www/html
git pull origin master

Thank you very much for the help.

#6

Hi gilbert-Mutal

I also tried so many times, but still I am getting an error message like validation file missing on app server 1. Can you please share me the step by step what have you done to resolve the task.

#7

Hello janardhan,

My issue was on the pipeline commands, I was using cp command aftre cloning the repo instead of adding the cloning command on the pipeline itself. Please chcek reply from @rop for more details, otherwise the code below solved my issue.

pipeline {
    agent { label 'stapp01' }

    stages {
        stage('Deploy') {
            steps {
                script {
                    sh '''
                        cd /var/www/html
                        git pull origin master
                    '''
                }
            }
        }
    }
}
#8

Thank you Gilbert. I will check it.