first-commit
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zeaslity
198
常用脚本/磁盘扩容.sh
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198
常用脚本/磁盘扩容.sh
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#!/bin/bash
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echo "n
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p
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t
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8e
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w
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" | fdisk /dev/sdc
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partprobe
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pvcreate /dev/sdc1
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vgextend rootvg /dev/sdc1
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export selfpesize=$(vgdisplay rootvg | grep 'Total PE' | awk '{print $3}')
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lvextend -l+${selfpesize} /dev/mapper/rootvg-lvvar
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xfs_growfs /dev/mapper/rootvg-lvroot
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<h3>k8s节点扩容</h3>
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<h5>1、设置时间同步及时区</h5>
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```shell
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yum makecache fast
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yum install ntp -y
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ntpdate ntp.ubuntu.com
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systemctl start ntpd
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systemctl enable ntpd
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cp -f /usr/share/zoneinfo/Asia/Shanghai /etc/localtim
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```
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<h5>2、设置hostname、selinux等</h5>
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```shell
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hostnamectl set-hostname dmz-k8s1-n8
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systemctl stop NetworkManager
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systemctl disable NetworkManager
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systemctl stop firewalld
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systemctl disable firewalld
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firewall-cmd --state
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setenforce 0
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getenforce
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sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
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cat /etc/selinux/config
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swapoff -a
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free
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sed -i 's/\(.*swap.*\)/#\1/' /etc/fstab
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cat /etc/fstab
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echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
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modprobe br_netfilter
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lsmod | grep br_netfilter
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cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
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br_netfilter
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EOF
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cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
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net.bridge.bridge-nf-call-ip6tables = 1
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net.bridge.bridge-nf-call-iptables = 1
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EOF
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sysctl --system
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sysctl -p
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```
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<h5>3、安装docker-ce</h5>
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```shell
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yum install -y yum-utils device-mapper-persistent-data lvm2
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yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
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yum makecache fast
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yum install -y containerd.io
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yum install -y docker-ce-cli-19.03.13-3.el7.x86_64
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yum install -y docker-ce-19.03.13-3.el7.x86_64
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rpm -qa |grep docker
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mkdir /etc/docker
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cat <<EOF | sudo tee /etc/docker/daemon.json
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{
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"exec-opts": ["native.cgroupdriver=systemd"],
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"log-driver": "json-file",
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"log-opts": {
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"max-size": "100m"
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},
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"storage-driver": "overlay2",
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"storage-opts": [
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"overlay2.override_kernel_check=true"
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],
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"insecure-registries": [
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"harbor-qa.sre.cdcyy.cn",
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"harbor-manager.sre.cdcyy.cn",
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"harbor-prod.sre.cdcyy.cn",
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"harbor.sre.cdcyy.cn"
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],
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"registry-mirrors": ["https://qbbxbykw.mirror.aliyuncs.com","https://docker.mirrors.ustc.edu.cn"]
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}
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EOF
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mkdir -p /etc/systemd/system/docker.service.d
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systemctl daemon-reload
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systemctl start docker
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systemctl enable docker
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# Generated by NetworkManager
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search ecs.io
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nameserver 192.168.34.40
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nameserver 223.5.5.5
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```
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<h5>4.添加ipvs支持</h5>
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```shell
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cat > /etc/sysconfig/modules/ipvs.modules <<EOF
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#!/bin/bash
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modprobe -- ip_vs
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modprobe -- ip_vs_rr
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modprobe -- ip_vs_wrr
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modprobe -- ip_vs_sh
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modprobe -- nf_conntrack_ipv4
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EOF
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chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4
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yum install -y ipset ipvsadm
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cat >/etc/sysctl.d/k8s.conf <<EOF
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net.ipv4.ip_forward = 1
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net.bridge.bridge-nf-call-ip6tables = 1
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net.bridge.bridge-nf-call-iptables = 1
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net.ipv6.conf.all.disable_ipv6 = 1
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net.ipv6.conf.default.disable_ipv6 = 1
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net.ipv6.conf.lo.disable_ipv6 = 1
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net.ipv6.conf.all.forwarding = 1
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EOF
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## 执行命令以应用
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sysctl -p /etc/sysctl.d/k8s.conf
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```
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<h5>5.安装kubelet组件</h5>
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```shell
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vi /etc/yum.repos.d/kubernetes.repo
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[kubernetes]
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name=Kubernetes
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baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-$basearch
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enabled=1
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gpgcheck=0
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repo_gpgcheck=0
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exclude=kubelet kubeadm kubectl
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cat > /etc/yum.repos.d/kubernetes.repo << EOF
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[kubernetes]
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name=Kubernetes
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baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
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enabled=1
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gpgcheck=0
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repo_gpgcheck=0
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gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
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EOF
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yum install -y kubelet-1.20.4-0.x86_64 --disableexcludes=kubernetes
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yum install -y kubeadm-1.20.4-0.x86_64 --disableexcludes=kubernetes
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yum downgrade -y kubectl-1.20.4-0.x86_64 --disableexcludes=kubernetes
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rpm -qa |grep kube
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systemctl enable --now kubelet （这里kubelet会一直报错重启，这是正常的，因为需要等待kubeadmin）
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yum install -y kubelet-1.18.0-0.x86_64 --disableexcludes=kubernetes
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yum install -y kubeadm-1.18.0-0.x86_64 --disableexcludes=kubernetes
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yum downgrade -y kubectl-1.18.0-0.x86_64 --disableexcludes=kubernetes
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rpm -qa |grep kube
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systemctl enable --now kubelet
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```
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<h5>6.加入集群</h5>
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```shell
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kubeadm token create --print-join-command
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kubeadm join 192.168.148.131:6443 --token 1btqa0.r7xinh9gq81qcftx --discovery-token-ca-cert-hash sha256:938924402f317621bdafc937184db37643335f1065db9ba6d5846f021e224ea0
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```
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<h5>7.打标签加污点</h5>
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```shell
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kubectl label nodes dmz-k8s1-n8 prolab=xczx
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kubectl taint nodes dmz-k8s1-n8 project=countryup:NoSchedule
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```
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kubeadm token create --print-join-command
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yum install -y glusterfs glusterfs-fuse glusterfs-rdma glusterfs-geo-replication glusterfs-devel
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