Posts

Controlling Access in Kubernetes with RBAC Introduction Role-based access control is an important component when it comes to managing a Kubernetes cluster securely. The more users and automated processes there are that need to interface with the Kubernetes API, the more important controlling access becomes. In this lab, you will have the opportunity to practice your skills with the Kubernetes RBAC system by implementing your own RBAC permissions to appropriately limit user access....

Backing up and Restoring Kubernetes Data in etcd Introduction Backups are an important part of any resilient system. Kubernetes is no exception. In this lab, you will have the opportunity to practice your skills by backing up and restoring a Kubernetes cluster state stored in etcd. This will help you get comfortable with the steps involved in backing up Kubernetes data. Solution Log in to the provided lab server using the credentials provided:...

ulimit stdin,stderr,stdout 1. ulimit ulimit 用于shell启动进程所占用的资源。 可以使用该命令查看进程占用资源的情况。 使用方法：ulimit [-acdfHlmnpsStvw] [size] core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 15463 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 32768 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 15463 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited # /etc/security/limits....

Performing a Kubernetes Upgrade with kubeadm Introduction When you are managing Kubernetes in the real world, it is essential that you are able to keep your cluster up to date. This lab will allow you to practice the process of upgrading a Kubernetes cluster to a newer Kubernetes version using kubeadm. This will ensure you are comfortable with the upgrade process and ready to manage real-world Kubernetes clusters. Solution Log in to the control plane server using the credentials provided:...

Building a Kubernetes 1.21 Cluster with Kubeadm Introduction This lab will allow you to practice the process of building a new Kubernetes cluster. You will be given a set of Linux servers, and you will have the opportunity to turn these servers into a functioning Kubernetes cluster. This will help you build the skills necessary to create your own Kubernetes clusters in the real world. Solution Log in to the lab server using the credentials provided:...