With Docker it's trivial to mount some part of host filesystem to the container. Enter the running command and parameters, as shown in Table 2. Once I found a solution, but it does not work. To execute multiple commands you may want: to create a script and mount it as a volume in your pod and execute it. it's postStart hook so I think it will work. How to run a pod with multiple commands and keeping an interactive shell after that with kubectl? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. What is the most accurate way to map 6-bit VGA palette to 8-bit? init containers can reserve resources for initialization that are not used I want to do everything with one bash command? Not the answer you're looking for? How to let Kubernetes pod run a local script, Running script from Linux shell inside a Kubernetes pod. See paragraph 5 about servlet context listeners here (you need to implement contextInitialized method), Run a script after starting tomcat at k8s pod startup, What its like to be on the Python Steering Council (Ep. So make sure you're using /bin/sh to avoid unwanted errors. If Phileas Fogg had a clock that showed the exact date and time, why didn't he realize that he had reached a day early? Last modified June 08, 2023 at 3:14 PM PST: Installing Kubernetes with deployment tools, Customizing components with the kubeadm API, Creating Highly Available Clusters with kubeadm, Set up a High Availability etcd Cluster with kubeadm, Configuring each kubelet in your cluster using kubeadm, Communication between Nodes and the Control Plane, Resource Management for Pods and Containers, Organizing Cluster Access Using kubeconfig Files, Guide for Running Windows Containers in Kubernetes, Compute, Storage, and Networking Extensions, Changing the Container Runtime on a Node from Docker Engine to containerd, Migrate Docker Engine nodes from dockershim to cri-dockerd, Find Out What Container Runtime is Used on a Node, Troubleshooting CNI plugin-related errors, Check whether dockershim removal affects you, Migrating telemetry and security agents from dockershim, Configure Default Memory Requests and Limits for a Namespace, Configure Default CPU Requests and Limits for a Namespace, Configure Minimum and Maximum Memory Constraints for a Namespace, Configure Minimum and Maximum CPU Constraints for a Namespace, Configure Memory and CPU Quotas for a Namespace, Switching from Polling to CRI Event-based Updates to Container Status, Change the Reclaim Policy of a PersistentVolume, Configure a kubelet image credential provider, Control CPU Management Policies on the Node, Control Topology Management Policies on a node, Guaranteed Scheduling For Critical Add-On Pods, Migrate Replicated Control Plane To Use Cloud Controller Manager, Reserve Compute Resources for System Daemons, Running Kubernetes Node Components as a Non-root User, Using NodeLocal DNSCache in Kubernetes Clusters, Assign Memory Resources to Containers and Pods, Assign CPU Resources to Containers and Pods, Configure GMSA for Windows Pods and containers, Resize CPU and Memory Resources assigned to Containers, Configure RunAsUserName for Windows pods and containers, Configure a Pod to Use a Volume for Storage, Configure a Pod to Use a PersistentVolume for Storage, Configure a Pod to Use a Projected Volume for Storage, Configure a Security Context for a Pod or Container, Configure Liveness, Readiness and Startup Probes, Attach Handlers to Container Lifecycle Events, Share Process Namespace between Containers in a Pod, Translate a Docker Compose File to Kubernetes Resources, Enforce Pod Security Standards by Configuring the Built-in Admission Controller, Enforce Pod Security Standards with Namespace Labels, Migrate from PodSecurityPolicy to the Built-In PodSecurity Admission Controller, Developing and debugging services locally using telepresence, Declarative Management of Kubernetes Objects Using Configuration Files, Declarative Management of Kubernetes Objects Using Kustomize, Managing Kubernetes Objects Using Imperative Commands, Imperative Management of Kubernetes Objects Using Configuration Files, Update API Objects in Place Using kubectl patch, Managing Secrets using Configuration File, Define a Command and Arguments for a Container, Define Environment Variables for a Container, Expose Pod Information to Containers Through Environment Variables, Expose Pod Information to Containers Through Files, Distribute Credentials Securely Using Secrets, Run a Stateless Application Using a Deployment, Run a Single-Instance Stateful Application, Specifying a Disruption Budget for your Application, Coarse Parallel Processing Using a Work Queue, Fine Parallel Processing Using a Work Queue, Indexed Job for Parallel Processing with Static Work Assignment, Handling retriable and non-retriable pod failures with Pod failure policy, Deploy and Access the Kubernetes Dashboard, Use Port Forwarding to Access Applications in a Cluster, Use a Service to Access an Application in a Cluster, Connect a Frontend to a Backend Using Services, List All Container Images Running in a Cluster, Set up Ingress on Minikube with the NGINX Ingress Controller, Communicate Between Containers in the Same Pod Using a Shared Volume, Extend the Kubernetes API with CustomResourceDefinitions, Use an HTTP Proxy to Access the Kubernetes API, Use a SOCKS5 Proxy to Access the Kubernetes API, Configure Certificate Rotation for the Kubelet, Adding entries to Pod /etc/hosts with HostAliases, Externalizing config using MicroProfile, ConfigMaps and Secrets, Apply Pod Security Standards at the Cluster Level, Apply Pod Security Standards at the Namespace Level, Restrict a Container's Access to Resources with AppArmor, Restrict a Container's Syscalls with seccomp, Exposing an External IP Address to Access an Application in a Cluster, Example: Deploying PHP Guestbook application with Redis, Example: Deploying WordPress and MySQL with Persistent Volumes, Example: Deploying Cassandra with a StatefulSet, Running ZooKeeper, A Distributed System Coordinator, Explore Termination Behavior for Pods And Their Endpoints, Certificates and Certificate Signing Requests, Mapping PodSecurityPolicies to Pod Security Standards, Well-Known Labels, Annotations and Taints, ValidatingAdmissionPolicyBindingList v1alpha1, Kubernetes Security and Disclosure Information, Articles on dockershim Removal and on Using CRI-compatible Runtimes, Event Rate Limit Configuration (v1alpha1), kube-apiserver Encryption Configuration (v1), kube-controller-manager Configuration (v1alpha1), Contributing to the Upstream Kubernetes Code, Generating Reference Documentation for the Kubernetes API, Generating Reference Documentation for kubectl Commands, Generating Reference Pages for Kubernetes Components and Tools, "until nslookup myservice.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo waiting for myservice; sleep 2; done", "until nslookup mydb.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo waiting for mydb; sleep 2; done", creating a Pod that has an init container, incorporated the review comments. Do the subject and object have to agree in number? This thread is archived New comments cannot be posted and votes cannot be cast 9 16 comments Best preconditions are met, all of the app containers in a Pod can start in parallel. independently without the need to jointly build a single app image. Could ChatGPT etcetera undermine community by making statements less significant for us? Getting started Learning environment Production environment Container Runtimes Installing Kubernetes with deployment tools Bootstrapping clusters with kubeadm Installing kubeadm Troubleshooting kubeadm Creating a cluster with kubeadm Customizing components with the kubeadm API Options for Highly Available Topology Changes to the init container spec are limited to the container image field. configuration file using Jinja. Why can't sunlight reach the very deep parts of an ocean? Startup probe check for application Readiness once the application is Ready liveness probe takes it's place. How To Run A Post-Deployment Script On Kubernetes - Xebia Running post-deployment scripts on Kubernetes requires you to check the deployment status. The double dash symbol "--" is used to separate the command you want to run inside the container from the kubectl arguments. If they job needs access to data created by your application then that data will need to be persisted outside the application/Pod, you could so this a few ways but the obvious ways would be a database or a persistent volume. Schedule a cron task for: kubectl exec -it $ (kubectl get pods --selector=some-selector | head -1) /path/to/script. Is this mold/mildew? Because init containers have separate images from app containers, they have some . Why can't sunlight reach the very deep parts of an ocean? Conclusions from title-drafting and question-content assistance experiments Is it better to use swiss pass or rent a car? AFAIK, init container and lifecycle such postStart does not help too. A car dealership sent a 8300 form after I paid $10k in cash for a car. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. Each init container must exit successfully before rev2023.7.24.43543. How to attach thick client to Ignite running on docker container? Error: Could not find or load main class com.myclass.Upg Conclusions from title-drafting and question-content assistance experiments How to schedule a cronjob which executes a kubectl command? To learn more, see our tips on writing great answers. How did this hand from the 2008 WSOP eliminate Scott Montgomery? Executing multiple commands( or from a shell script) in a kubernetes pod. unnecessary tools separate you can limit the attack surface of your init container completion record has been lost due to garbage collection. Find centralized, trusted content and collaborate around the technologies you use most. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts.