A record of repairing a cluster failure caused by an IP change. There are two clusters: one single-node (allinone) cluster, and one four-node cluster (3 masters, 1 node). 1. Update the Etcd Certificates [On every Etcd node] Back up the Etcd certificates 1 cp -R /etc/ssl/etcd/ssl /etc/ssl/etcd/ssl-bak View the domains

1. Picking Up from Last Time: Shared Storage Optimizes Pulling Images Overseas Building on An Image Management and Distribution Case Based on Harbor and Registry, I recently made another optimization. The previous approach was to deploy a Mirror Cache in each region on a machine with low specs and a large disk to cache images.

1. Installation Method 1 2 kubectl apply -f https://openebs.github.io/charts/openebs-operator.yaml kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}' OpenEBS is mainly used as the default storage for Tekton pipelines. I had also tried Longhorn before, but it could not hold up during peak hours and the pipelines went Pending. And after uninstalling Longhorn there were leftovers, which caused kube-apiserver to keep reporting errors, and in the end it took a great deal of effort to remove.

1. Traffic Control Principles Under Linux By queuing packets, we can control how data packets are sent. This kind of control is called data shaping (shape the data), and it includes the following operations on data: Adding latency Dropping packets Reordering Duplicating, corrupting Rate control Under the qdisc-class-filter structure, controlling traffic requires three steps:

1. Background At 10:00 in the morning, a colleague asked me to run a task on the cluster, so I created a Kubernetes Job through a tool. When the tool creates a Job, it first gets all the nodes on the cluster, then binds to each node one by one to create Jobs.