jenkins terraform kubernetes

the IP address of the running cluster: Now we can access the Jenkins instance at 192.168.99.100:32664/. Access within your cluster to download the. This is meant to be a starting point for you to build on and explore. Pipeline as Code: Continuous Delivery with Jenkins, Kubernetes, and Here, we see a step-by-step process for setting up Jenkins on a Kubernetes Cluster. You can get the worker node hostname using the kubectl. This article will walk you through deploying Jenkins on Kubernetes with several different levels of sophistication, ultimately ending in our goal: an enterprise-grade Jenkins instance that is highly available, durable, highly scalable, and managed as code. installed to work correctly. Replace the pod name with your pod name. While some similarities exist, the differences help clarify how each solution is unique. The Job DSL gives us a way to specify podTemplates to customize the additional containers coming up, through normal k8s yaml: This runs successfully, and the console output tells us that a pod is coming up with both the Jenkins container and our custom container: The job does exactly what I told it to (prints out the pwd), which is fine for todays example. The app connects to Azure Cosmos DB. To validate that creating the service was successful you can run: So now we have created a deployment and service, how do we access Jenkins? Terraform is an open source tool. 200+ Videos. In general, I recommend limiting the number of plugins you install as much as possible. Lets check on the status of the Jenkins service by running the following command SSH via in my windows powershell. That doesnt actually load for me because the IP is wrong Im on OS X where Docker has to run containers inside a VM, so its returning the IP as the VM thats running the k8s pods sees it. In your environment it might work as-is, but for me, I needed to hit http://localhost:30155/login, to load: Log in with my extra-secret password and: Not a bad start! DevOps with Jenkins Terraform AWS Docker Swarm Maven Kubernetes GIT & Ansible Automation with DevOps Realworld Exercises 4.6 (5,308 ratings) 33,208 students Created by LevelUp360 DevOps | GCP | Terraform | Kubernetes | Ansible Last updated 4/2023 English English [Auto], Italian [Auto], What you'll learn The code in variable.tf defines four variables that will be used to create the Jenkins server: The code in variable.tf defines four variables that will be used to create the Jenkins server. Runs, builds, and tests applications. Here you can install any number of useful plugins as part of your Alright. The Jenkins Kubernetes plugin is designed to automate the scaling of Jenkins executors (sometimes referred to as agents) in a Kubernetes cluster. See the configuration as code documentation and examples. so modifications to data within /var/jenkins_home are written to the volume. Azure + Terraform. using either of the two options below. Here is my main.tf: The 'jenkins-admin' cluster role has all the permissions to manage the cluster components. In this Jenkins Kubernetes deployment we have used the following: 'securityContext' for Jenkins pod to be able to write to the local persistent volume. I highly recommend evaluating the chart, creating your own version of the chart, and customizing it to meet your needs before deploying it into a production environment. The instance variable specifies the instance type that will be used to create the Jenkins server. e) Execute Terraform script in sequence. Im free to configure my job exactly how I need it, using any Docker images I need to get it done. (Terraforms Icon also reminds me of my childhood favorite toy: Dragonfly Frisbee Toy lol, the joy of seeing it propel upward each time is a wonderful thing!) Jenkins launches the build job using Azure Kubernetes Service (AKS) for a dynamic build agent. built-in backup functionality) that we dont take advantage of here with the default chart configuration. However, as the docs mention, it needs the. So I created a minikube cluster on the same machine on which jenkins is installed. They can, however, work in tandem to provide a full-stack deployment solution. Kubernetes (K8s) is an open-source system for automating deployment, scaling, First, well bring you into our world through in depth technical articles, ground breaking statistical analysis and tales of epic and annual nerf wars. I learn that it is a better practice is to use multiple files, each of which contains a specific type of resource or configuration. Using Terraform, you can provision clusters and deploy applications in the same apply operation. The NodePort service type will bypass the ingress and just expose the service at a port directly. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla Add theming to make Jenkins a little cleaner by using something like the, If you want to stick with block storage for storing data from the primary Jenkins instance, you will want to add an automated volume backup system to restore from if the volume is ever corrupted. This makes my code more readable and maintainable, minimize human error and it makes it easier to reuse code. Provision Instructions Copy and paste into your Terraform configuration, insert the variables, and run terraform init : module " deployment " { source = " terraform-iaac/deployment/kubernetes " version = " 1.4.3 " # insert the 2 required variables here } Readme Inputs ( 43 ) Outputs ( 2 ) Dependency ( 1 ) Resource ( 1 ) This week, we have evolved to learn all about Jenkins and Terraformlol. All the Jenkins Kubernetes manifest files used here are hosted on GitHub. Okay, wait for that Deployment to finish provisioning, checking every once in a while to see if the Deployment is in aReady state using the kubectl get deployments command. Spin up a VM to be used as the primary Jenkins instance. Its pretty easy to get Jenkins up and running, but how do you set up your organization for success in the long run? Jenkins is always there to make sure everything is working smoothly and to assist developers in their work. chosen set of Jenkins plugins being installed. Typically, if you are setting up Jenkins for an enterprise, you will likely: Lets walk through the first three steps, but do so in a Kubernetic way. Executors launch very quickly (i.e. TL;DR. If you dont have Helm command line interface installed and configured locally, see the sections below to Install Helm and Configure Helm. We cant wait to show you what were working on. - name: postgres So, I switch my kubectl context to the cluster, remove the last LOCAL ONLY section from values.yaml, create a new namespace `jenkins-test`, and install the Jenkins chart: Like I suspected, the ingress does not come up, so we just need to add a section to values.yaml to configure it: With that, Jenkins comes up on the host specified and works like a charm. The easy option is just to turn that setting off, with the permissive-script-security plugin. AKS container CI/CD with Jenkins and Kubernetes - Azure Architecture To access Jenkins, you initially need to enter your credentials. The plan includes the resources that will be created, modified, or destroyed, as well as the actions that will be taken to make those changes. Jenkins will ask for the initial Admin password when you access the dashboard for the first time. terraform init. crash, deletion, node failure), Kubernetes will schedule a new pod to the cluster. ServiceAccounts, Roles, and RoleBindings) to give the primary instance Deployment the permissions it needs to launch executors. Whenever you trigger a Jenkins job, the Jenkins Kubernetes plugin will make an API call to create a Kubernetes agent pod. To do so, save the following configuration to your file system as 4-basic-service.yaml: Navigate to the folder containing that configuration and run the following command: kubectl apply -f 4-basic-service.yaml. Convert the stable Helm chart we used above to a custom one stored in source control. Learn DevOps: Docker, Kubernetes, Terraform and Azure DevOps Second, state is also tracked in Terraform, giving you a reference point for what is happening in the cluster. The password is at the end of the log formatted as a long alphanumeric string: You have successfully installed Jenkins on your Kubernetes cluster and can use it to create new and efficient development pipelines. Business, Economics, and Finance. Now, save the following Terraform configuration to a file called 7-terraform-config.tf: Awesome, now we can use Terraform to deploy our chart. Visit the Jenkins Configuration as Code project for more information on configuration as code. SentinelOne is hiring Staff Software Engineer - Reddit You should now be able to see the Jenkins Getting Started page in your browser at http://localhost:3000. comments sorted by Best Top New Controversial Q&A Add a Comment . Its value is not important for this tutorial, but it is very important when you are actually using Jenkins in production. Once completed lets check that IP with port 8080 included at the end. install. Lets make this setup even better. #1: LEARN 6 DevOps Tools - Docker, Kubernetes, Azure DevOps, Jenkins, Terraform, and Ansible #2: LEARN 3 Different Clouds - AWS, Azure, and Google Cloud #3: ONE of the HIGHEST RATED DEVOPS courses (JUNE 2021) #4: IMPLEMENT DEVOPS with a HANDS-ON approach Because weve done this, we wont have to pass the --namespace argument to all of our future commands. Terraform kubernetes-alpha provider Second, the new alpha Kubernetes provider. , but it wont be parsed as YAML syntax for this document itself. terraform-ansible-kubernetes-jenkins-docker-aws DevOps CI/CD Pipeline Pre-requisites Computer: Physical or a Virtual Machines (VM): creates a virtualized environmentcalled, simply enough, a virtual machinethat behaves like a separate computer system, complete with virtual hardware devices. high availability, durable data storage, scalability). Discrepancy in docs and execution for Azure Kubernetes Fleet - GitHub While having one Terraform project for related resources is a good idea. Init: The init command initializes the Terraform environment. labels: indicated by the kind field. The selector specifies the selection criteria for the Pods targeted by this service. terraform apply -var="key=value". To do that, lets first determine what Pods exist in our namespace: kubectl get pods. https://www.jenkins.io/doc/book/installing/linux/. alphanumeric password (between the 2 sets of asterisks). Introduce the Jenkins Kubernetes plugin that gives us a way of scaling our Jenkins builds. For setting up a Jenkins Cluster on Kubernetes, we will do the following: Create a service account with Kubernetes admin permissions. following command to inspect the status of your Pod: Once Jenkins is installed, the status should be set to Running as in the following output: To access your Jenkins server, you must retrieve the password. Jenkins builds and pushes Docker container to Azure Container Registry. This post outlines a path to getting an enterprise-grade Jenkins instance up and running on Kubernetes. Pro tip: Jenkins restarts can be a little finicky. A GitHub repo containing the code snippets from this post can be found here. Alpesh Jikadra Alpesh Jikadra. That is not a good idea if your pipeline is open for editing by others, but here, everything will be controlled through code. Kubernetes | Jenkins plugin Documentation Releases Issues Dependencies Kubernetes plugin for Jenkins Jenkins plugin to run dynamic agents in a Kubernetes cluster. Before we do, lets clean up our previous work by running the following: Now, lets set up a values file to pass into the Helm chart. Do you need more reasons for enrolling for this amazing course on DevOps? A RoleBinding may reference any Role in the same namespace. We use cookies & other similar technology to collect data to improve your experience on our site, . For production, you should provide a network resource like a Google Compute Engine persistent disk, or an Amazon Elastic Block Store volume. git clone the new repository via HTTPS and cd into the git clone directory. Review the official Jenkins Documentation for more information: Create and assign a Security Group to the Jenkins Security Group that allows traffic on port 22 from your ip and allows traffic from port 8080. The password can be obtained in several ways. This directory will contain our Jenkins controller configuration. Create an Azure Kubernetes Fleet Manager and omit the hub_profile block. This requires the external-dns controller to be running in your cluster. IaC creates and manages system resources through configuration files instead of manipulating hardware resources manually or with interactive tools. On the Unlock Jenkins page, paste this password into the Administrator If you arent familiar with ingresses and ingress controllers, a quick summary is that ingresses are a Kubernetes resource that define how a service, By the way, if you arent familiar with the syntax, the pipe (|) after welcome-message signifies that the nested part below is actually going to be loaded as plaintext, not as YAML. The value of the output is the public IP address of the Jenkins server. This is happening because we didnt configure our Jenkins instance to have persistent storage. Your Deployment will eventually return to aReady state of 1/1. If youre unfamiliar with Helm, its a package manager for Kubernetes that allows you to quickly install full, pre-defined applications into a Kubernetes cluster. The YAML files are easily tracked, edited, and can be reused indefinitely. That should save you from some unexpected troubleshooting as you go through this post. Alternatively, if you don't wish to complete the quick form, you can simply Throughout this post, the commonly-used terms master and slave are substituted with primary and executor to be more inclusive. SampathSivaKumar Boddeti on LinkedIn: #eks #kubernetes #argocd #gitops jenkins-sa.yaml. Copy that password, enter it into the password input field, and select continue. T: Its Secure. The plan shows the resources that will be created, updated, or deleted. (Please remember to customize it according to your specification :). Building and deploying a Jenkins cluster from scratch Writing pipeline as code for cloud-native applications Automating the deployment of Dockerized and Serverless applications Containerizing applications with Docker and Kubernetes Deploying Jenkins on AWS, GCP and Azure Managing, securing and monitoring a Jenkins cluster in production jayjay2626/terraform-ansible-kubernetes-jenkins-docker-aws Paste the content from https://raw.githubusercontent.com/installing-jenkins-on-kubernetes/jenkins-sa.yaml into a YAML formatted file called I looked through the charts values and decided on a small set of my own values to start with: The last section (LOCAL ONLY) is there because my local Kubernetes cluster didnt have an ingress controller installed. Verify that you can reach your Jenkins install via port 8080 in your browser. This will create a Jenkins primary instance Deployment from the jenkins/jenkins:lts Docker image with a replica count of one. Now, go back to http://localhost:3000 in your browser and refresh the page. DevSecOps: How to Automate Continuous Cloud Security with Jenkins and These values are then used to populate a set of YAML template files defined as part of the chart. Running Jenkins on Kubernetes In this article, I will take you through the steps required to setup and configure Jenkins on a Managed Kubernetes cluster such as AKS and running a simple pipeline with agent pods dynamically provisioned. T: Its Open Source. We will create a volume which is called jenkins-pv: Paste the content from https://raw.githubusercontent.com/installing-jenkins-on-kubernetes/jenkins-volume.yaml into a YAML formatted file called jenkins-volume.yaml. Kubernetes. Jenkins deploys your new containerized app to Kubernetes on Azure. This will initialize a state file that holds Terraform state typically you would store this state remotely using something like Amazon S3. Jenkins when installing it) and wait until the Unlock Jenkins page appears. Deploying Jenkins on Google Cloud - DEV Community are based on most common use cases. The target port is the port to access the Pods targeted by this service. When it comes to creating Jenkins jobs . Also, you can expose the Jenkins service as a Loadbalancer if you are running the cluster on AWS, Google, or Azure cloud. With the pod name, you can get the logs as shown below. tty: true You can get the pod details using the following CLI command. If the service is not running, you can use the output of the command to determine the cause of the problem. Hosting Jenkins on a Kubernetes Cluster is beneficial for Kubernetes-based deployments and dynamic container-based scalable Jenkins agents. Browse to http://localhost:8080 (or whichever port you configured for This will print out what is going to change in the cluster based on the configuration you have defined. Terraform uses a declarative language to describe your infrastructure. I found a reference for JCasC which contains some example jobs in the Groovy DSL, which is the modern way to define Jenkins jobs: https://github.com/jenkinsci/configuration-as-code-plugin/tree/master/demos/jobs, . A Configmap for installing additional plugins and running other miscellaneous scripts. Before we get started, let me provide a little background. Booyah! Deploying Jenkins on Kubernetes with Helm and Terraform - Innovation This means that Kubernetes noticed a missing Pod and created a new one to return the Deployment to the right number of replicas. a Deployment or ReplicaSet). There are multiple ways to customize your job, including changing the agent image itself, but it might be easiest to bring up a second (or third, or fourth) container using an image of your choice. You should get something like this: Now, you can delete that Pod like so: kubectl delete pod jenkins-standalone-deployment-759b989cf4-6ptvc. Run the following command to apply the spec: Minikube configured for hostPath sets the permissions on /data to the root account only. However, if the node gets deleted, you will lose all the data. I only needed a few jobs configured, and my uptime requirements were soft; I didnt want to over-build it. By default, applications will authenticate as the default service account in We now have a highly-available Jenkins primary instance, we can create jobs on that instance, we can run builds, and the number of Jenkins executor Pods will automatically scale as the build queue fills up. To do so, the process is super simple. Pods that want to interact with the API server will authenticate with a A Service for the Jenkins primary instance Deployment that exposes ports 8080 and 50000. If you dont want the local storage persistent volume, you can replace the volume definition in the deployment with the host directory as shown below. How to connect to a minikube cluster using terraform on jenkins pipeline? Before we get started, let me provide a little background. The Jenkins Operator is a Kubernetes native Operator which manages operations From a security perspective, plugins are one of the weakest links for Jenkins, so limit their use and keep them up to date. On this page, add a Kubernetes cloud and then click Kubernetes Cloud details. ; Then, the Jenkins agent pod gets deployed in the kubernetes with a few environment variables containing the Jenkins server details and secrets. Codify our Helm deployment using Terraform to get the many benefits of infrastructure as code. Give it a few minutes for the underlying resources to actually come up; behind the scenes, Kubernetes will still need to download images and spin up containers. On this page, you will see the output from your pipeline. I decided to try and bring Jenkins up from a Helm chart, applied through Terraform and configured only through Jenkins Configuration-as-Code (JCasC). How to Setup Jenkins Build Agents on Kubernetes Pods - DevOpsCube If this looks good to you, run terraform apply. Use Jenkins Configuration as Code by specifying configScripts in your values.yaml file. Introduction Customers running microservices-based applications on Amazon Elastic Kubernetes Service ( Amazon EKS) are looking for guidance on architecting complete end-to-end Continuous Integration (CI) and Continuous Deployment / Delivery (CD) pipelines using Jenkins and Spinnaker. The deployment file uses local storage class persistent volume for Jenkins data. Now, save the following Deployment configuration to your file system as 2-basic-deployment.yaml: Navigate to the folder containing that configuration and run the following command: kubectl apply -f 2-basic-deployment.yaml. It should look approximately like this: Terrific! if you want to define a role within a namespace, use a Role. 1.4.6. To bind a ClusterRole to all the namespaces in our cluster, we use a ClusterRoleBinding. Helm Charts provide push button deployment and deletion of apps, making adoption and development of Kubernetes apps easier for those with little container or microservices experience. Though some might argue our setup is highly-available and scalable, what we just deployed is still not anywhere near the enterprise-grade solution we are looking for. Set up monitoring via Prometheus and Grafana to evaluate the health of your Jenkins instance over time. Lets move onto the next step. A role binding grants the permissions defined in a role to a user or set of users. It allows us to maintain a persistent connection to the pod regardless of the changes in the cluster. This example uses the Jenkins deployment pod name. The blog youre reading right now will be our home. With Jenkins as the backbone, you'll programmatically control all the pieces of your pipeline via modern APIs. It was built with immutability and declarative configuration as code in mind, to automate many of the manual tasks required Permissions to deploy workloads into your Kubernetes cluster, forward ports to those workloads, and execute commands on containers. The Pod exposes the port 8080 of the jenkins container. Give it a few minutes for the underlying resources to actually come up; behind the scenes, Kubernetes will still need to download images and spin up containers. Go to http://localhost:3000/view/all/newJob or the equivalent URL based on your port forwarding setup and create a Pipeline with the name jenkins-on-kubernetes-pipeline you may be prompted to enter your new admin users password. We can add that to the helm chart through the additionalPlugins key, we wont need to override all the default plugins too. We walk through the steps necessary to utilize Terraform to create an AWS EC2 instance, install and start Jenkins, assign Jenkins security groups, and save the private Jenkins Artifacts in an S3 bucket. Ideally, you should use a persistent volume using the available storage class with the cloud provider, or the one provided by the cluster administrator to persist data on node failures. We need Jenkins to actually run some jobs, and we dont want to define them by hand. This section describes how to use a set of YAML (Yet Another Markup Language) files to install Jenkins on a Kubernetes cluster. Only cloud providers offer load balancers. This plugin also needs to be enabled through a JVM option flag, which luckily the Jenkins chart exposes as well. cd opta-gcp/ opta apply. To make Jenkins accessible outside the Kubernetes cluster the Pod needs to be exposed as a Service. Alright. https://www.linkedin.com/in/jasonlidevopsengineer/, You can reach out to me directly. Helm and Terraform are used to make the process simple, robust, and easy to repeat. poush/jenkins/kubernetes | Terraform Registry We just ran a Jenkins build successfully on Kubernetes. Lets get started! Login to your Jenkins UI and navigate to Manage Jenkins > Configure System. The output should be a base64 encoded string like this: Decode the base64 string and you have your password. T: Its Declarative. We choose to use the /data directory.
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