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系統(tǒng)運(yùn)維 一、環(huán)境準(zhǔn)備
172.16.8.101 k8s-master01
172.16.8.102 k8s-master02
172.16.8.103 k8s-master03
172.16.8.104 k8s-master04
172.16.8.105 k8s-master05
172.16.8.106 k8s-master06
#harbor
172.16.8.201 k8s-node01CentOS 7.x 系統(tǒng)自帶的 3.10.x 內(nèi)核存在一些 Bugs，導(dǎo)致運(yùn)行的 Docker、Kubernetes 不穩(wěn)定，例如：
高版本的 docker(1.13 以后) 啟用了 3.10 kernel 實(shí)驗(yàn)支持的 kernel memory account 功能(無(wú)法關(guān)閉)，當(dāng)節(jié)點(diǎn)壓力大如頻繁啟動(dòng)和停止容器時(shí)會(huì)導(dǎo)致 cgroup memory leak；
網(wǎng)絡(luò)設(shè)備引用計(jì)數(shù)泄漏，會(huì)導(dǎo)致類(lèi)似于報(bào)錯(cuò)：kernel:unregister_netdevice: waiting for eth0 to become free. Usage count = 1;
https://blog.51cto.com/10880347/2420861
https://blog.csdn.net/xiegh3014/article/details/96192233cat >> /etc/hosts<https://devops51.blog.csdn.net/article/details/53031781
swapoff -a
sed -i \'/ swap / s/^\\(.*\\)$/#\\1/g\' /etc/fstab 必須關(guān)閉 tcp_tw_recycle，否則和NAT 沖突，會(huì)導(dǎo)致服務(wù)不通；
關(guān)閉 IPV6，防止觸發(fā) docker BUG；
cat > /etc/sysctl.d/k8s.conf <modprobe ip_vs_rr
modprobe br_netfilter調(diào)整系統(tǒng) TimeZone
timedatectl set-timezone Asia/Shanghai
將當(dāng)前的 UTC 時(shí)間寫(xiě)入硬件時(shí)鐘
timedatectl set-local-rtc 0
重啟依賴(lài)于系統(tǒng)時(shí)間的服務(wù)
systemctl restart rsyslog
systemctl restart crondyum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget
yum install -y yum-utils device-mapper-persistent-data lvm2
使用阿里云Docker Yum源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
選擇安裝的版本
yum list docker-ce --showduplicates | sort -r已加載插件：fastestmirror, langpacks
可安裝的軟件包
Loading mirror speeds from cached hostfile
docker-ce.x86_64 3:19.03.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.0-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.8-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.7-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.6-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.5-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.4-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.3-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.2-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.0-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.3.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.2.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.1.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.0.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.03.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 18.03.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.12.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.12.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.09.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.09.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.06.2.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.06.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.06.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.03.3.ce-1.el7 docker-ce-stable
docker-ce.x86_64 17.03.2.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.03.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.03.0.ce-1.el7.centos docker-ce-stable
yum install docker-ce-18.09.8-3.el7 -y
啟動(dòng)DOcker
systemctl start docker
systemctl enable docker
cat > /etc/docker/daemon.json<
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors" : [
"https://ot2k4d59.mirror.aliyuncs.com/"
]
}
EOF
配置Docker鏡像倉(cāng)庫(kù)必須重啟
systemctl restart docker
查看Docker信息
[root@k8s-master01 ~]# docker info
Client:
Debug Mode: false
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 18.09.8
Storage Driver: overlay2
Backing Filesystem: xfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: systemd
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 894b81a4b802e4eb2a91d1ce216b8817763c29fb
runc version: 425e105d5a03fabd737a126ad93d62a9eeede87f
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 4.4.183-1.el7.elrepo.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 1.936GiB
Name: k8s-master01
ID: YZ5Q:2IUX:THW4:Z7DF:GK43:QG4O:D2M2:DVUL:3YI3:G3Y3:J4QE:5A64
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Registry Mirrors:
https://ot2k4d59.mirror.aliyuncs.com/
Live Restore Enabled: false
Product License: Community Engine
cat <
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
當(dāng)前文章：Centos7.6使用kubeadm部署Kubernetes1.15集群
URL鏈接：http://www.ef60e0e.cn/article/cggogc.html
