一、kubernetes(使用docker为容器运行时版本)
二、kubernetes 部署工具介绍
What is Kubeadm ?
Kubeadm is a tool built to provide best-practice "fast paths" for creating Kubernetes clusters. It performs the actions necessary to get a minimum viable, secure cluster up and running in a user friendly way. Kubeadm's scope is limited to the local node filesystem and the Kubernetes API, and it is intended to be a composable building block of higher level tools.
Kubeadm是为创建Kubernetes集群提供最佳实践并能够“快速路径”构建kubernetes集群的工具。它能够帮助我们执行必要的操作,以获得最小可行的、安全的集群,并以用户友好的方式运行。
Common Kubeadm cmdlets
- kubeadm init to bootstrap the initial Kubernetes control-plane node.
初始化
- kubeadm join to bootstrap a Kubernetes worker node or an additional control plane node, and join it to the cluster.
添加工作节点到kubernetes集群
- kubeadm upgrade to upgrade a Kubernetes cluster to a newer version.
更新kubernetes版本
- kubeadm reset to revert any changes made to this host by kubeadm init or kubeadm join.
重置kubernetes集群
三、kubernetes 部署环境准备
3.1 主机操作系统说明
序号 | 操作系统及版本 | 备注 |
---|---|---|
1 | CentOS7u9 |
3.2 主机硬件配置说明
需求 | CPU | 内存 | 硬盘 | 角色 | 主机名 |
---|---|---|---|---|---|
值 | 4C | 8G | 100GB | master | master01 |
值 | 4C | 8G | 100GB | worker(node) | worker01 |
值 | 4C | 8G | 100GB | worker(node) | worker02 |
3.3 主机配置
3.3.1 主机名配置
由于本次使用3台主机完成kubernetes集群部署,其中1台为master节点,名称为master01;其中2台为worker节点,名称分别为:worker01及worker02
master节点,名称为master1
# hostnamectl set-hostname master01
worker1节点,名称为worker1
# hostnamectl set-hostname worker01
worker2节点,名称为worker2
# hostnamectl set-hostname worker02
3.3.2 主机IP地址配置
master节点IP地址为:192.168.10.11/24
# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.10.11"
PREFIX="24"
GATEWAY="192.168.10.2"
DNS1="119.29.29.29"
worker1节点IP地址为:192.168.10.12/24
# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.10.12"
PREFIX="24"
GATEWAY="192.168.10.2"
DNS1="119.29.29.29"
worker2节点IP地址为:192.168.10.13/24
# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.10.13"
PREFIX="24"
GATEWAY="192.168.10.2"
DNS1="119.29.29.29"
3.3.3 主机名与IP地址解析
所有集群主机均需要进行配置。
# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.11 master01
192.168.10.12 worker01
192.168.10.13 worker02
3.3.4 防火墙配置
所有主机均需要操作。
关闭现有防火墙firewalld
# systemctl disable firewalld
# systemctl stop firewalld
# firewall-cmd --state
not running
3.3.5 SELINUX配置
所有主机均需要操作。修改SELinux配置需要重启操作系统。
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