https://www.chenshaowen.com/en/tags/cluster/Recent content in Cluster on Shaowen Chen's WebsiteHugo -- gohugo.ioen©2016 - {year}, All Rights Reserved.Thu, 04 Sep 2025 00:00:00 +0000weeklyhttps://www.chenshaowen.com/en/blog/kubernetes-base-environment-requirements.htmlThu, 04 Sep 2025 00:00:00 +0000Thu, 04 Sep 2025 00:00:00 +0000https://www.chenshaowen.com/en/blog/kubernetes-base-environment-requirements.html1. Base Packages Kubernetes version ≥ 1.18 socat Required conntrack Required ebtables Optional, but recommended ipset Optional, but recommended ipvsadm Optional, but recommended 1 apt-get -y install socat conntrack ebtables ipset ipvsadm 2. Port Requirements 2.1 Base Node Services Service Protocol Action Start Port End Port Comment ssh TCP allow 22 22 Node remote management docker TCP allow 2375 2376 Docker remote communication etcd TCP allow 2379 2380 etcd cluster communication 2.微信公众号KubernetesClusterConfigurationSecurityOperationsLearningInstallationDependenciesBest Practiceshttps://www.chenshaowen.com/en/blog/how-to-repair-k8s-master-after-reinstalling-os.htmlTue, 17 Jan 2023 00:00:00 +0000Tue, 17 Jan 2023 00:00:00 +0000https://www.chenshaowen.com/en/blog/how-to-repair-k8s-master-after-reinstalling-os.htmlRecently I ran into this twice: a host had to be reinstalled because of a failure. In one case only a single Etcd node was left, and the whole cluster stayed down for half an hour before it recovered. This post mainly records the process of initializing a fresh Ubuntu微信公众号KubernetesRepairOperationsEtcdTroubleshootingClusterKubekeyLearninghttps://www.chenshaowen.com/en/blog/kubernetes-cluster-troubleshooting.htmlTue, 01 Nov 2022 01:00:00 +0000Tue, 01 Nov 2022 01:00:00 +0000https://www.chenshaowen.com/en/blog/kubernetes-cluster-troubleshooting.htmlFailedCreatePodSandBox Error Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: process_linux.go:402: getting the final child's pid from pipe caused: EOF: unknown Resolution Clear the cache 1 echo 3 > /proc/sys/vm/drop_caches Cause Too much memory fragmentation calico-node Keeps Restarting increase max user Error runtime: failed to微信公众号KubernetesClusterTroubleshootingOperationsLearningFault DiagnosisPodBest PracticesProblem Localizationhttps://www.chenshaowen.com/en/blog/how-to-repair-the-kubernetes-cluster-after-changing-ip.htmlTue, 25 Oct 2022 00:00:00 +0000Tue, 25 Oct 2022 00:00:00 +0000https://www.chenshaowen.com/en/blog/how-to-repair-the-kubernetes-cluster-after-changing-ip.htmlA 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微信公众号KubernetesOperationsRepairTroubleshootingLearningEtcdCertificatesClusterNetworkhttps://www.chenshaowen.com/en/blog/the-use-of-etcd-and-etcdctl.htmlTue, 11 Aug 2020 00:00:00 +0000Tue, 11 Aug 2020 00:00:00 +0000https://www.chenshaowen.com/en/blog/the-use-of-etcd-and-etcdctl.html1. Basic Introduction to Etcd Etcd is a distributed Key/Value storage system. Through distributed locks, leader election, and write barriers it achieves distributed coordination, offering highly available, persistent data storage and retrieval services. How it works Every Etcd node stores a complete copy of the data, and at any moment微信公众号EtcdEtcdctlKubernetesOperationsLearningDistributed StorageConfigurationClusterhttps://www.chenshaowen.com/en/blog/backup-kubernetes-cluster-using-velero.htmlWed, 25 Dec 2019 00:00:00 +0000Wed, 25 Dec 2019 00:00:00 +0000https://www.chenshaowen.com/en/blog/backup-kubernetes-cluster-using-velero.html1. Introduction to Velero Velero is an open-source Kubernetes cluster backup and migration tool from the heptio team (acquired by VMWare). Velero stores cluster resources in object storage. It supports AWS, Azure, and GCP object storage by default, is compatible with the S3 protocol, and can be extended to other platforms such as Aliyun OSS through plugins.微信公众号KubernetesVeleroBackupOperationsLearningDisaster RecoveryMigrationClusterhttps://www.chenshaowen.com/en/blog/using-kubeadm-to-install-the-kubernetes-cluster.htmlThu, 15 Aug 2019 00:00:00 +0000Thu, 15 Aug 2019 00:00:00 +0000https://www.chenshaowen.com/en/blog/using-kubeadm-to-install-the-kubernetes-cluster.html1. Cluster Planning Prepare three hosts: one Master and two Nodes. Operating system: CentOS 7 Specs: 2 Core 4 GB Docker version: 18.06.3 Kubernetes version: 1.15.3 If you are using a purchased cloud host, open the following ports: 1 2 3 4 5 6 7 8 9 10 11 12微信公众号KubernetesKubeadmInstallationOperationsClusterLearning