Question : The development team of xFusionCorp Industries is working on to develop a new static website and they are planning to deploy the same on Nautilus App Servers using Jenkins pipeline. They have shared their requirements with the DevOps team and accordingly we need to create a Jenkins pipeline job. Please find below more details about the task:
Click on the + button in the top left corner and select option Select port to view on Host 1, enter port 8081 and click on Display Port. You should be able to access the Jenkins login page. Login using username theadmin and Adm!n321 password.
In the same way you can access Gitea UI on port 8000; username and password for Git is sarah and Sarah_pass123 respectively. There under user sarah you will find a repository named web_app that is already cloned on Storage server under /home/sarah/web_app. sarah is a developer who is working on this repository.
Add a slave node named Storage Server. It should be labeled as ststor01 and its remote root directory should be /home/natasha.
We have already cloned repository on Storage Server under /home/sarah/web_app. Update the content of the file index.html under the same repository to Welcome to Nautilus Group! and push the changes to the origin into master branch.
Apache is already installed on all app Servers its running on port 6200.
Create a Jenkins pipeline job named datacenter-webapp-job (it must not be a Multibranch pipeline) and configure it to:
a. Deploy the code from web_app repository under /data on Storage Server, as this location is already mounted to the document root /var/www/html of app servers. The pipeline should have a single stage named Deploy ( which is case sensitive ) to accomplish the deployment.
Note:
You might need to install some plugins and restart Jenkins service. So, we recommend clicking on Restart Jenkins when installation is complete and no jobs are running on plugin installation/update page i.e update centre. Also, Jenkins UI sometimes gets stuck when Jenkins service restarts in the back end. In this case, please make sure to refresh the UI page.
For these kind of scenarios requiring changes to be done in a web UI, please take screenshots so that you can share it with us for review in case your task is marked incomplete. You may also consider using a screen recording software such as loom.com to record and share your work.
LB server is already configured. Click on the + button in the top left corner and select option Select port to view on Host 1, enter port 80 and click on Display Port. You should be able to see the latest changes you made. Please make sure the required content is loading on the main URL https://<LBR-URL> i.e there should not be a sub-directory like https://<LBR-URL>/web_app etc.
This task is based on web UI, you can refer below Video Solution for better understanding
Solution:
1. Click on the + button in the top left corner and select option Select port to view on Host 1, enter port 8081 and click on Display Port. You should be able to access the Jenkins login page. Login using username theadmin and Adm!n321 password.
2. Click Jenkins > Manage Jenkins > Manage Plugins and click Available tab.
Search for Pipeline Git, SSH Pipeline & SSH Build Agents plugin and click Download now and install after restart
Refresh your browser for the login screen
3. Before adding a new Slave Node as a prerequisite Java package need to be install
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thor@jump_host /$ ssh natasha@ststor01 The authenticity of host 'ststor01 (172.16.238.15)' can't be
established. ECDSA key fingerprint is
SHA256:SySamszyWhhLGFiybhGBqfrr8g55wS/3e37ZpBOvICs. ECDSA key fingerprint is MD5:6d:31:18:2a:f9:07:f3:29:dd:0a:d3:1f:6e:04:0a:db. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'ststor01,172.16.238.15' (ECDSA) to the
list of known hosts. natasha@ststor01's password: [natasha@ststor01 ~]$ sudo su - We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: #2) Think before you type. #3) With great power comes
great responsibility. [sudo] password for natasha: [root@ststor01 ~]# [root@ststor01 ~]# rpm -qa |grep java [root@ststor01 ~]# [root@ststor01 ~]# yum install -y java Loaded plugins: fastestmirror, ovl Determining fastest mirrors epel/x86_64/metalink | 29 kB
00:00:00 * base:
centosmirror.netcup.net * epel: mirror.dogado.de * extras:
mirror.checkdomain.de * updates:
mirror.checkdomain.de base
| 3.6 kB 00:00:00 epel
Installing: java-1.8.0-openjdk x86_64 1:1.8.0.292.b10-1.el7_9 updates 310 k Installing for dependencies: alsa-lib x86_64 1.1.8-1.el7 base 425 k atk
x86_64
2.28.1-2.el7
base 263 k avahi-libs x86_64 0.6.31-20.el7 base 62 k cairo
x86_64
1.15.12-4.el7
base 741 k copy-jdk-configs noarch 3.3-10.el7_5 base 21 k
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4. Add a new slave node under Jenkins > Manage Jenkins > Manage Nodes and Clouds
5. Wait for a few seconds for the agent to be configured. Refresh the nodes list.
6. Setup Credentials for GIT user sarah
7. Create a new Pipeline Job
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// //
Setup up the Remote connection for SSH Build Pipeline step // def
remote = [:] remote.name
= 'ststor01' remote.host
= 'ststor01' remote.user
= 'natasha' remote.password
= 'Bl@kW' remote.allowAnyHosts
= true
pipeline
{
// Run on agent with label 'ststor01'
agent { label 'ststor01' }
// Pipeline stages
stages {
// Deploy stage
stage('Deploy') {
steps {
// Connect to GIT and
download the repo code
// Use the Jenkins
Credentials by ID: GIT_CREDS
git credentialsId:
'GIT_CREDS', url: 'http://git.stratos.xfusioncorp.com/sarah/web_app.git'
// Transfer all the files we
downloaded to /tmp of ststor01
sshPut remote: remote, from:
'.', into: '/tmp'
// Finally move all the
files from /tmp to /data on ststor01
sshCommand remote: remote,
command: "mv -f /tmp/${JOB_NAME}/* /data"
}
}
} } |
9. Login on Storage Server & Commit changes to index.html
thor@jump_host /$ ssh sarah@ststor01 The authenticity of host 'ststor01 (172.16.238.15)' can't be established. ECDSA key fingerprint is SHA256:SySamszyWhhLGFiybhGBqfrr8g55wS/3e37ZpBOvICs. ECDSA key fingerprint is MD5:6d:31:18:2a:f9:07:f3:29:dd:0a:d3:1f:6e:04:0a:db. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'ststor01,172.16.238.15' (ECDSA) to the list of known hosts. sarah@ststor01's password: [sarah@ststor01 ~]$ [sarah@ststor01 ~]$ cd /home/sarah/web_app/ [sarah@ststor01 web_app]$ ll total 4 -rw-r--r-- 1 sarah sarah 35 Jun 22 09:33 index.html [sarah@ststor01 web_app]$ cat index.html Welcome to xFusionCorp Industries! [sarah@ststor01 web_app]$ [sarah@ststor01 web_app]$ curl http://stapp01:6200 Welcome to xFusionCorp Industries! [sarah@ststor01 web_app]$ [sarah@ststor01 web_app]$ vi index.html [sarah@ststor01 web_app]$ cat index.html Welcome to Nautilus Group! [sarah@ststor01 web_app]$ [sarah@ststor01 web_app]$ git add index.html [sarah@ststor01 web_app]$ git commit -m "update" [master f8af1e4] update
1 file changed, 1
insertion(+), 1 deletion(-) [sarah@ststor01 ~]$ [sarah@ststor01
web_app]$ git push origin master Counting objects: 5, done. Writing objects: 100% (3/3), 269 bytes | 0 bytes/s, done. Total 3 (delta 0), reused 0 (delta 0) remote: . Processing 1 references remote: Processed 1 references in total To
http://sarah:Sarah_pass123@git.stratos.xfusioncorp.com/sarah/web_app.git
091c946..f8af1e4 master ->
master
[sarah@ststor01 web_app]$ |
10. Validate the task by running build job in newly created Pipeline & Check console output
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[sarah@ststor01
web_app]$ curl http://stapp01:6200 Welcome to
Nautilus Group! [sarah@ststor01
web_app]$ curl http://stapp02:6200 Welcome to
Nautilus Group! [sarah@ststor01
web_app]$ curl http://stapp03:6200 Welcome to
Nautilus Group! [sarah@ststor01
web_app]$ |
11. Click on Finish & Confirm to complete the task successfully
Happy Learning!!!!
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