Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about how kubeadm deploys a single Master node K8S cluster, which may not be well understood by many people. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something from this article.

1 Environment

Host NameRoleIPmaster1master110.10.25.149node1node110.10.25.150node2node210.10.25.151

2 kernel tuning

Vim / etc/sysctl.confnet.ipv6.conf.all.disable_ipv6 = 1net.ipv6.conf.default.disable_ipv6 = 1net.ipv6.conf.lo.disable_ipv6 = 1vm.swappiness = 0net.ipv4.neigh.default.gc_stale_time=120net.ipv4.ip_forward = "see details in https://help.aliyun.com/knowledge_detail/39428.htmlnet.ipv4.conf.all.rp_filter=0net.ipv4.conf.default.rp_filter=0net.ipv4.conf.default.arp_announce = 2net" .ipv4.conf.lo.arp _ announce=2net.ipv4.conf.all.arp_announce=2# see details in https://help.aliyun.com/knowledge_detail/41334.htmlnet.ipv4.tcp_max_tw_buckets = 5000net.ipv4.tcp_syncookies = 1net.ipv4.tcp_max_syn_backlog = 1024net.ipv4.tcp_synack_retries = 2kernel.sysrq = 1net.bridge.bridge-nf-call-ip6tables = 1net.bridge.bridge-nf-call-iptables = 1net.bridge.bridge-nf-call-arptables = 1modprobe br_netfiltersysctl-p

3 set file maximum descriptor

Echo "* soft nofile 65536" > > / etc/security/limits.confecho "* hard nofile 65536" > > / etc/security/limits.confecho "* soft nproc 65536" > > / etc/security/limits.confecho "* hard nproc 65536" > > / etc/security/limits.confecho "* soft memlock unlimited" > > / etc/security/limits.confecho "* hard memlock unlimited" > > / etc/security/limits.conf

4 configure yum Feed

Cat / tmp/crontab2.tmpcrontab / tmp/crontab2.tmpsystemctl start ntpdate.servicentpdate-u ntp.api.bz

7 turn off SELinux and firewall

Systemctl stop firewalldsystemctl disable firewalldsetenforce 0sed-I "s/SELINUX=enforcing/SELINUX=disabled/g" / etc/selinux/config

8 turn off the Swap of the system

Swapoff-ayes | cp / etc/fstab / etc/fstab_bakcat / etc/fstab_bak | grep-v swap > / etc/fstab

9 install docker

Yum list docker-ce--showduplicates | sort-r yum install docker-ce-systemctl daemon-reloadsystemctl enable dockersystemctl start docker

10 configure hosts resolution

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain610.10.25.151 node210.10.25.149 master-110.10.25.150 node1

11 configure node secret-free login

Ssh-keygenssh-copy-id-I ~ / .ssh/id_rsa.pub user name @ 192.168.x.xxx

12 configure ipvs Modul

Cat > / etc/sysconfig/modules/ipvs.modules

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