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How to Configure Jenkins to Use Kubernetes Pods as Build Agents
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
0:06
kubernetes ports as built
0:09
agents this setup will help you scale
0:11
your cicd pipeline efficiently and save
0:14
resources let's dive in before we start
0:17
make sure you have a running kubernetes
0:19
cluster genkins installed and running
0:22
kubernetes command line tool Cube Kettle
0:24
configured and admin access to both
0:27
Jenkins and kubernetes cluster we will
0:29
cover this process in four main steps
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first step is to install kubernetes
0:34
plugin second getting cluster
0:36
credentials that is Cube config third we
0:39
will integrate the kubernetes cluster
0:41
with genkins master and Define code and
0:43
container template in the last we will
0:46
test our configuration with a simple job
0:49
all right without any delay let's Deep
0:51
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
0:59
our gen
1:00
so log to a genkins GUI navigate to
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manage
1:05
genkins and then click on
1:08
plugins select avable plugins search
1:12
here
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kubernetes so install this
1:20
plugin select the plugin and click on
1:23
install choose this option restart Chen
1:26
kins with installation is complete and
1:28
no jobs are running
1:32
it will take a minute or
1:35
two once the plug-in is installed login
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to your genkins
1:41
GUI again navigate to manage
1:47
genkins this time select
1:50
security under the security we will have
1:53
agent section here select the first
1:56
option fixed that is TCB port for
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inbound agents and specify the port by
2:03
default it is 50,000 so you can give the
2:05
default Port as
2:07
50,000 click on
2:10
apply and then
2:14
save this 50,000 Port is commonly used
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by genkins for jnlp traffic Java Network
2:20
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
2:41
already taken the SSS session of my
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genkins
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master now run the command sud do
2:50
ufw
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allow
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50,000
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slcp H enter now reload the changes for
3:00
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
4:10
credentials click on ADD
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credentials select the kind as secret
4:17
file scope will be
4:20
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
4:36
create now add your kubernetes cluster
4:39
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
4:52
Cloud now specify the name of your Cloud
4:55
name let's say key it
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as clro
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select the type as
5:02
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
5:47
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
5:58
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
6:26
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
6:41
click on container
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template container name would be
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something like
6:52
jnlp container image will be pulled from
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the repo genkins slash
7:02
inbound iph
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agent and the working directory on the
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agent would be/ home/
7:12
Jenkins keep this blank and argument
7:15
also is blank and leave the other
7:19
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
7:29
the name k s agent which will be using a
7:33
default name space and label is KS agent
7:37
under this P template we have one
7:38
container template container name is gnl
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this is my Docker image that will be
7:44
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
7:53
the genin slaves all right now in order
7:56
to test this configurations let's create
7:59
a sample Pipeline and we will force that
8:02
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
8:14
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
8:38
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
9:00
the P
9:01
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
9:26
has been created using the P template k
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as agent Cod name is this this
9:33
one and it has
9:37
executed the code under
9:40
the working directory SL home/ Jenkins
9:44
and it has executed uh Eco command hello
9:47
from kubernetes Sport and executed the
9:49
host
9:50
name this confirms that we have
9:53
successfully able to execute our
9:57
pipeline using our template which is
10:00
provision on our kubernetes Cloud that's
10:04
it you have successfully configured
10:05
genkins to use kuber Sports as build
10:09
agents if you have found this
10:11
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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