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How to Configure Jenkins to Use Kubernetes Pods as Build Agents
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Jan 8, 2025
Learn how to configure Jenkins to dynamically use Kubernetes pods as build agents! 🚀 In this video, we'll set up a scalable CI/CD pipeline that efficiently utilizes Kubernetes resources. Whether you're managing a small project or a large-scale deployment, this tutorial will guide you step-by-step through the integration process. 📋 What You’ll Learn: 1️⃣ Install the Kubernetes plugin for Jenkins 2️⃣ Configure Kubernetes cluster credentials 3️⃣ Integrate Jenkins with Kubernetes and define pod templates 4️⃣ Test the setup with a sample pipeline job ✅ Prerequisites: A running Kubernetes cluster Jenkins installed and running Kubernetes command-line tool (kubectl) configured Admin access to both Jenkins and Kubernetes 🛠️ Steps Covered: Step 1: Install the Kubernetes plugin and configure the TCP agent port Step 2: Obtain your Kubernetes cluster credentials
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0:00
hey everyone welcome back to our Channel
0:02
today we are going to learn how to
0:04
configure genkins to dynamically spin up
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kubernetes ports as built
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agents this setup will help you scale
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your cicd pipeline efficiently and save
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resources let's dive in before we start
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make sure you have a running kubernetes
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cluster genkins installed and running
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kubernetes command line tool Cube Kettle
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configured and admin access to both
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Jenkins and kubernetes cluster we will
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cover this process in four main steps
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first step is to install kubernetes
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plugin second getting cluster
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credentials that is Cube config third we
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will integrate the kubernetes cluster
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with genkins master and Define code and
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container template in the last we will
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test our configuration with a simple job
0:49
all right without any delay let's Deep
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dive into the step in order to integrate
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kubernetes cluster with genkins Master
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we must install kubernetes plugins on
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our gen
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so log to a genkins GUI navigate to
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manage
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genkins and then click on
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plugins select avable plugins search
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here
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kubernetes so install this
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plugin select the plugin and click on
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install choose this option restart Chen
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kins with installation is complete and
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no jobs are running
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it will take a minute or
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two once the plug-in is installed login
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to your genkins
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GUI again navigate to manage
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genkins this time select
1:50
security under the security we will have
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agent section here select the first
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option fixed that is TCB port for
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inbound agents and specify the port by
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default it is 50,000 so you can give the
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default Port as
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50,000 click on
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apply and then
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save this 50,000 Port is commonly used
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by genkins for jnlp traffic Java Network
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launch protocol jenin uses jnlp to
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stabilize communication between Jenkins
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Master node that is controller and its
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agents that is slaves that are running
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on remote
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machines now SSH your genkins master and
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allow this port in your firewall in case
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firewall is up and running I have
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already taken the SSS session of my
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genkins
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master now run the command sud do
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ufw
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allow
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50,000
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slcp H enter now reload the changes for
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that run the command
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ufw
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reload output confirms that we have
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allowed 50,000 port on our genin Master
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next get the cube config of your
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kubernetes cluster I am already
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connected to my control
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plane so this Cube config will be used
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while creating a credentials for our
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kubernetes
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cluster in my case Cube config is placed
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under the folder dot
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cube with the name
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config so copy this config file on your
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system let's download
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it now head back to the genkins GUI and
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create the credentials for your
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kubernetes cluster
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okay navigate to manage
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genkins and then click
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credentials to system Global
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credentials click on ADD
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credentials select the kind as secret
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file scope will be
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Global now select the config file that
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you have just
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downloaded give the name as Cube
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config then click on
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create now add your kubernetes cluster
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into the genkins as a cloud so again go
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back to manage
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genkins and then under system
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configuration click on
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clouds and click on new
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Cloud now specify the name of your Cloud
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name let's say key it
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as clro
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select the type as
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kubernetes and then click
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create now we need to get the kubernetes
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URL now go back to your control
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plane if you C this
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file so this is the kubernetes URL in my
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case just
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copy paste it
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here now scroll down under the
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credentials section select the
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credential that we have just created
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just select config and click on test
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connections output confirms that we are
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able to connect our kubernetes
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cluster now click on
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Save now select this cluster now we'll
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Define the PO template template for this
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cluster click on add a port
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template under the name section specify
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the name for your Port template let's
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say it's key it as hyphen
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agent and name space where the bo will
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be created so it would be under
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default label let's say KS hyph
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agent under the uses select this options
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scroll down a little bit and here you
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will
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get add a container template option so
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click on container
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template container name would be
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something like
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jnlp container image will be pulled from
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the repo genkins slash
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inbound iph
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agent and the working directory on the
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agent would be/ home/
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Jenkins keep this blank and argument
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also is blank and leave the other
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parameters as it is and then click on
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create if you click on again this Cloud
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here we will have one po template with
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the name k s agent which will be using a
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default name space and label is KS agent
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under this P template we have one
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container template container name is gnl
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this is my Docker image that will be
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used while spinning of the Pod and this
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would be the home directory that will be
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used by our Jenkins agent or we call or
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the genin slaves all right now in order
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to test this configurations let's create
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a sample Pipeline and we will force that
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pipeline to run on the this kuber port
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whose label is KS
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isent click on plus new item let's
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say
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demo pipeline hyphen Kate hyphen isent
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select the pipeline and then click
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okay use pipeline
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and use this sample pipeline code so if
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you see in this pipeline we are
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specifically mentioning that please run
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this stage on the agent whose label is
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K8 hyphen
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agent and we have one stage with the
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name test here we are executing two
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commands first one is Eco from the kuber
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port and then running a host name from
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the P
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itself click on
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Save now try to run this pipeline click
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on build
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now we can see the console output a p
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has been created using the P template k
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as agent Cod name is this this
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one and it has
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executed the code under
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the working directory SL home/ Jenkins
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and it has executed uh Eco command hello
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from kubernetes Sport and executed the
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host
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name this confirms that we have
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successfully able to execute our
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pipeline using our template which is
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provision on our kubernetes Cloud that's
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it you have successfully configured
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genkins to use kuber Sports as build
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agents if you have found this
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useful hit the like button subscribe for
10:14
more devops tutorials drop a comment if
10:17
you have any questions thank you for
10:19
watching see you in the next video
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