Kubernetes的kubeadm项目安装部署
OS System: [root@localhost ~]# cat /etc/redhat-release CentOS Linux release 7.8.2003 (Core) 内核版本： [root@localhost ~]# uname -r 5.4.109-1.el7.elrepo.x86_64 k8s-master-VIP:172.168.32.248 haproxy+keepalived-master:172.168.32.208 haproxy+keepalived-slave:172.168.32.209 #etcd01:172.168.32.211 #etcd02:172.168.32.212 #etcd03:172.168.32.213 k8s-master01:172.168.32.201 k8s-master02:172.168.32.202 k8s-master03:172.168.32.203 k8s-node01:172.168.32.204 k8s-node02:172.168.32.205 k8s-node03:172.168.32.206 harbor+ansible+nfs:172.168.32.41 访问域名： 172.168.32.248 www.ywx.net harbor域名： 172.168.32.41 harbor.ywx.net
# 载入公钥 rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org # 安装ELRepo rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm # 载入elrepo-kernel元数据 yum --disablerepo=\* --enablerepo=elrepo-kernel repolist # 查看可用的rpm包 yum --disablerepo=\* --enablerepo=elrepo-kernel list kernel* # 安装长期支持版本的kernel yum --disablerepo=\* --enablerepo=elrepo-kernel install -y kernel-lt.x86_64 # 删除旧版本工具包 yum remove kernel-tools-libs.x86_64 kernel-tools.x86_64 -y # 安装新版本工具包 yum --disablerepo=\* --enablerepo=elrepo-kernel install -y kernel-lt-tools.x86_64 #查看默认启动顺序 [root@localhost tmp]# awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg CentOS Linux (5.4.109-1.el7.elrepo.x86_64) 7 (Core) CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core) CentOS Linux (0-rescue-d7e33d2d499040e5ab09a6182a7175d9) 7 (Core) #默认启动的顺序是从0开始，新内核是从头插入（目前位置在0，而4.4.4的是在1），所以需要选择0。 grub2-set-default 0 #重启并检查 reboot
报错解决
Error: Package: kernel-lt-tools-5.4.109-1.el7.elrepo.x86_64 (elrepo-kernel) Requires: libpci.so.3(LIBPCI_3.3)(64bit) Error: Package: kernel-lt-tools-5.4.109-1.el7.elrepo.x86_64 (elrepo-kernel) Requires: libpci.so.3(LIBPCI_3.5)(64bit) You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest 处理方法： yum install -y pciutils-libs
四、安装部署keepalived+haproxy
在172.168.32.208和172.168.32.209上部署keepalived
yum install -y keepalived
haproxy+keepalived-master:172.168.32.208的keepalived配置文件
! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 172.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL vrrp_skip_check_adv_addr vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 3 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.168.32.248 dev eth0 label eth0:1 } }
haproxy+keepalived-slave:172.168.32.209的keepalived的配置
! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 172.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL vrrp_skip_check_adv_addr vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0 } vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 80 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.168.32.248 dev eth0 label eth0:1 } }
启动keepalived，并设置为开机自启动
systemctl start keepalived
systemctl enable keepalived
keepalived master:172.168.32.208
[root@haproxy01 ~]# ip a|grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 inet 172.168.32.208/16 brd 172.168.255.255 scope global eth0 inet 172.168.32.248/32 scope global eth0:1
keepalived slave:172.168.32.209
[root@haproxy02 ~]# ip a|grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 inet 172.168.32.209/16 brd 172.168.255.255 scope global eth0
keepalived master:172.168.32.208
[root@haproxy01 ~]# systemctl stop keepalived.service [root@haproxy01 ~]# ip a |grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 inet 172.168.32.208/16 brd 172.168.255.255 scope global eth0
keepalived slave:172.168.32.209
[root@haproxy02 ~]# ip a|grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 inet 172.168.32.209/16 brd 172.168.255.255 scope global eth0 inet 172.168.32.248/32 scope global eth0:1
VIP漂移成功过
该实验需要在haproxy01:172.168.32.208和haproxy02:172.168.32.209上都部署
yum安装会自动生成防火墙策略，可以删除或禁止生成 [root@haproxy02 ~]# iptables -vnL Chain INPUT (policy ACCEPT 46171 packets, 3069K bytes) pkts bytes target prot opt in out source destination 0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 match-set keepalived dst #yum安装的keepalived会在input链上设置一条iptables规则，该规则是静止访问VIP。
修改iptables规则
[root@haproxy02 ~]# iptables-save > /tmp/iptables.txt [root@haproxy02 ~]# vim /tmp/iptables.txt # Generated by iptables-save v1.4.21 on Tue Apr 6 02:57:11 2021 *filter :INPUT ACCEPT [47171:3118464] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [46521:2350054] -A INPUT -m set --match-set keepalived dst -j DROP COMMIT # Completed on Tue Apr 6 02:57:11 2021 #将-A INPUT -m set --match-set keepalived dst -j DROP改为-A INPUT -m set --match-set keepalived dst -j ACCEPT #重新导入iptables规则 [root@haproxy02 ~]# iptables-restore /tmp/iptables.txt [root@haproxy02 ~]# iptables -vnL Chain INPUT (policy ACCEPT 115 packets, 5732 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 match-set keepalived dst VIP即可ping通
设置自动加载iptables规则
[root@haproxy02 ~]#vim /etc/rc.d/rc.local /usr/sbin/iptables-restore /tmp/iptables.txt [root@haproxy02 ~]#chmod +x /etc/rc.d/rc.local
在172.168.32.208和172.168.32.209上部署haproxy
yum install -y haproxy
在haproxy.cfg的配置文件添加如下信息
listen stats mode http bind 172.168.32.248:9999 stats enable log global stats uri /haproxy-status stats auth haadmin:123456 listen k8s_api_nodes_6443 bind 172.168.32.248:6443 mode tcp #balance leastconn server 172.168.32.201 172.168.32.201:6443 check inter 2000 fall 3 rise 5 server 172.168.32.202 172.168.32.202:6443 check inter 2000 fall 3 rise 5 server 172.168.32.203 172.168.32.203:6443 check inter 2000 fall 3 rise 5
启动haporxy
systemctl start haproxy
systemctl enable haproxy
可以使用www.ywx.net:9999/haproxy-status访问
1、 软件版本
harbor 172.168.32.41
harbor软件版本： harbor-offline-installer-v1.8.6 docker: 19.03.9-ce OS [root@harbor ~]# cat /etc/redhat-release CentOS Linux release 7.8.2003 (Core) [root@harbor ~]# uname -r 3.10.0-1127.el7.x86_64
docker安装脚本
cat >> /tmp/docker_install.sh << EOF #! /bin/bash ver=19.03.9 yum install -y yum-utils device-mapper-persistent-data lvm2 yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo yum makecache fast yum install -y docker-ce-$ver docker-ce-cli-$ver systemctl start docker systemctl enable docker EOF
安装docker
bash /tmp/docker_install.sh
安装Docker Compose
方法一： https://github.com/docker/compose/releases mv docker-compose-Linux-x86_64 /usr/bin/docker-compose chmod +x /usr/bin/docker-compose 方法二： yum install -y docker-compose
mkdir /certs cd /certs #生成私有key openssl genrsa -out /certs/harbor-ca.key #签发证书 openssl req -x509 -new -nodes -key /certs/harbor-ca.key -subj "/CN=harbor.ywx.net" -days 7120 -out /certs/harbor-ca.crt
mkdir /apps cd /apps #把harbor-offline-installer-v2.1.2.tgz上传到/apps tar -xf harbor-offline-installer-v2.1.2.tgz #修改harbor配置文件 cd harbor cp harbor.yml.tmpl harbor.yml #配置文件信息 vim harbor.yml # Configuration file of Harbor # The IP address or hostname to access admin UI and registry service. # DO NOT use localhost or 127.0.0.1, because Harbor needs to be accessed by external clients. hostname: 172.168.32.41 # http related config http: # port for http, default is 80. If https enabled, this port will redirect to https port port: 80 # https related config https: # https port for harbor, default is 443 port: 443 # The path of cert and key files for nginx certificate: /certs/harbor-ca.crt private_key: /certs/harbor-ca.key # # Uncomment following will enable tls communication between all harbor components # internal_tls: # # set enabled to true means internal tls is enabled # enabled: true # # put your cert and key files on dir # dir: /etc/harbor/tls/internal # Uncomment external_url if you want to enable external proxy # And when it enabled the hostname will no longer used # external_url: https://reg.mydomain.com:8433 # The initial password of Harbor admin # It only works in first time to install harbor # Remember Change the admin password from UI after launching Harbor. harbor_admin_password: 123456 。。。。。。 #安装harbor ./install.sh
访问https://172.168.32.41或者域名访问https://harbor.ywx.net
kubernetes所有master和node节点
1、安装部署ansible
在172.168.32.41上部署ansible
yum install -y ansible
系统初始化
yum install vim iotop bc gcc gcc-c++ glibc glibc-devel pcre \ pcre-devel openssl openssl-devel zip unzip zlib-devel net-tools \ lrzsz tree ntpdate telnet lsof tcpdump wget libevent libevent-devel \ bc systemd-devel bash-completion traceroute -y ntpdate time1.aliyun.com \cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime echo "*/5 * * * * ntpdate time1.aliyun.com &> /dev/null && hwclock -w" >> /var/spool/cron/root systemctl stop firewalld systemctl disable firewalld systemctl stop NetworkManager systemctl disable NetworkManager
内核参数优化
cat > /etc/modules-load.d/ipvs.conf <<EOF # Load IPVS at boot ip_vs ip_vs_rr ip_vs_wrr ip_vs_sh nf_conntrack_ipv4 EOF systemctl enable --now systemd-modules-load.service #确认内核模块加载成功 lsmod | grep -e ip_vs -e nf_conntrack_ipv4 #安装ipset、ipvsadm yum install -y ipset ipvsadm #配置内核参数; cat <<EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF sysctl --system
vim /etc/sysctl.conf # sysctl settings are defined through files in # /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/. # # Vendors settings live in /usr/lib/sysctl.d/. # To override a whole file, create a new file with the same in # /etc/sysctl.d/ and put new settings there. To override # only specific settings, add a file with a lexically later # name in /etc/sysctl.d/ and put new settings there. # # For more information, see sysctl.conf(5) and sysctl.d(5). # Controls source route verification net.ipv4.conf.default.rp_filter = 1 net.ipv4.ip_nonlocal_bind = 1 net.ipv4.ip_forward = 1 # Do not accept source routing net.ipv4.conf.default.accept_source_route = 0 # Controls the System Request debugging functionality of the kernel kernel.sysrq = 0 # Controls whether core dumps will append the PID to the core filename. # Useful for debugging multi-threaded applications. kernel.core_uses_pid = 1 # Controls the use of TCP syncookies net.ipv4.tcp_syncookies = 1 # Disable netfilter on bridges. net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.bridge.bridge-nf-call-arptables = 0 # Controls the default maxmimum size of a mesage queue kernel.msgmnb = 65536 # # Controls the maximum size of a message, in bytes kernel.msgmax = 65536 # Controls the maximum shared segment size, in bytes kernel.shmmax = 68719476736 # # Controls the maximum number of shared memory segments, in pages kernel.shmall = 4294967296 # TCP kernel paramater net.ipv4.tcp_mem = 786432 1048576 1572864 net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_wmem = 4096 16384 4194304 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_sack = 1 # socket buffer net.core.wmem_default = 8388608 net.core.rmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.core.netdev_max_backlog = 262144 net.core.somaxconn = 20480 net.core.optmem_max = 81720 # TCP conn net.ipv4.tcp_max_syn_backlog = 262144 net.ipv4.tcp_syn_retries = 3 net.ipv4.tcp_retries1 = 3 net.ipv4.tcp_retries2 = 15 # tcp conn reuse net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_tw_reuse = 0 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_fin_timeout = 1 net.ipv4.tcp_max_tw_buckets = 20000 net.ipv4.tcp_max_orphans = 3276800 net.ipv4.tcp_synack_retries = 1 net.ipv4.tcp_syncookies = 1 # keepalive conn net.ipv4.tcp_keepalive_time = 300 net.ipv4.tcp_keepalive_intvl = 30 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.ip_local_port_range = 10001 65000 # swap vm.overcommit_memory = 0 vm.swappiness = 10 #net.ipv4.conf.eth1.rp_filter = 0 #net.ipv4.conf.lo.arp_ignore = 1 #net.ipv4.conf.lo.arp_announce = 2 #net.ipv4.conf.all.arp_ignore = 1 #net.ipv4.conf.all.arp_announce = 2
sysctl.conf脚本
#!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213" for node in ${IP};do #sshpass -p 123456 ssh-copy-id ${node} -o StrictHostKeyChecking=no &> /dev/null scp -r /apps/sysctl.conf ${node}:/etc/ ssh ${node} "/usr/sbin/sysctl --system" if [ $? -eq 0 ];then echo "${node} iptable_k8s.conf copy完成" else echo "${node} iptable_k8s.conf copy失败" fi done
4、配置ansible 172.168.32.41主机免密钥登录所有kubernetes集群主机
cat scp.sh #!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213 “ for node in ${IP};do sshpass -p 123456 ssh-copy-id ${node} -o StrictHostKeyChecking=no &> /dev/null if [ $? -eq 0 ];then echo "${node} 秘钥copy完成" else echo "${node} 秘钥copy失败" fi done
配置免密钥
[root@harbor tmp]# ssh-keygen [root@harbor tmp]# bash scp.sh 172.168.32.201 秘钥copy完成 172.168.32.202 秘钥copy完成 172.168.32.203 秘钥copy完成 172.168.32.204 秘钥copy完成 172.168.32.205 秘钥copy完成 172.168.32.206 秘钥copy完成 172.168.32.211 秘钥copy完成 172.168.32.212 秘钥copy完成 172.168.32.213 秘钥copy完成
在172.168.32.41上操作
拷贝hosts文件到所有的集群所有节点
vim /etc/hosts 172.168.32.201 k8s-master01 172.168.32.202 k8s-master02 172.168.32.203 k8s-master03 172.168.32.204 k8s-node01 172.168.32.205 k8s-node02 172.168.32.206 k8s-node03 #172.168.32.211 etcd01 #172.168.32.212 etcd02 #172.168.32.213 etcd03 172.168.32.41 harbor.ywx.net 172.168.32.248 www.ywx.net
hosts贝脚本
#!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213" for node in ${IP};do scp -r /etc/hosts root@${node}:/etc/hosts if [ $? -eq 0 ];then echo "${node} hosts copy完成" else echo "${node} hosts copy失败" fi done
vim time_tongbu.sh #!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213" for node in ${IP};do ssh ${node} "/usr/sbin/ntpdate time1.aliyun.com &> /dev/null && hwclock -w" if [ $? -eq 0 ];then echo "${node}--->time sysnc success!!!" else echo "${node}--->time sysnc false!!!" fi done
同步集群时间
[root@harbor apps]# bash time_tongbu.sh 172.168.32.201--->time sysnc success!!! 172.168.32.202--->time sysnc success!!! 172.168.32.203--->time sysnc success!!! 172.168.32.204--->time sysnc success!!! 172.168.32.205--->time sysnc success!!! 172.168.32.206--->time sysnc success!!! 172.168.32.211--->time sysnc success!!! 172.168.32.212--->time sysnc success!!! 172.168.32.213--->time sysnc success!!!
时间同步测试脚本
#!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213" for node in ${IP};do echo "------------" echo ${node} ssh ${node} echo "${hostname}-$(/usr/bin/date)" done
测试集群时间是否同步
[root@harbor apps]# bash date.sh ------------ 172.168.32.201 -Sat May 22 06:12:56 CST 2021 ------------ 172.168.32.202 -Sat May 22 06:12:56 CST 2021 ------------ 172.168.32.203 -Sat May 22 06:12:56 CST 2021 ------------ 172.168.32.204 -Sat May 22 06:12:57 CST 2021 ------------ 172.168.32.205 -Sat May 22 06:12:57 CST 2021 ------------ 172.168.32.206 -Sat May 22 06:12:57 CST 2021 ------------ 172.168.32.211 -Sat May 22 06:12:57 CST 2021 ------------ 172.168.32.212 -Sat May 22 06:12:57 CST 2021 ------------ 172.168.32.213 -Sat May 22 06:12:57 CST 2021
vim swapoff.sh #!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213" for node in ${IP};do #sshpass -p 123456 ssh-copy-id ${node} -o StrictHostKeyChecking=no &> /dev/null ssh ${node} "swapoff -a && sed -i '/swap/s@UUID@#UUID@g' /etc/fstab" if [ $? -eq 0 ];then echo "${node} swap关闭成功" else echo "${node} swap关闭失败" fi done
执行关闭swap的脚本
[root@harbor apps]# bash swapoff.sh 172.168.32.201 swap关闭成功 172.168.32.202 swap关闭成功 172.168.32.203 swap关闭成功 172.168.32.204 swap关闭成功 172.168.32.205 swap关闭成功 172.168.32.206 swap关闭成功 172.168.32.211 swap关闭成功 172.168.32.212 swap关闭成功 172.168.32.213 swap关闭成功
在所有的master和node节点上操作
1、安装docker-v19.03.8
docker_install.sh
#! /bin/bash ver=19.03.8 yum install -y yum-utils device-mapper-persistent-data lvm2 yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo yum makecache fast yum install -y docker-ce-$ver docker-ce-cli-$ver systemctl start docker systemctl enable docker
docker_scp.sh
#!/bin/bash #目标主机列表 IP=" 172.168.32.201 172.168.32.202 172.168.32.203 172.168.32.204 172.168.32.205 172.168.32.206 172.168.32.211 172.168.32.212 172.168.32.213" for node in ${IP};do #sshpass -p 123456 ssh-copy-id ${node} -o StrictHostKeyChecking=no &> /dev/null scp -r /apps/docker_install.sh ${node}:/tmp/ ssh ${node} "/usr/bin/bash /tmp/docker_install.sh" if [ $? -eq 0 ];then echo "${node}----> docker install success完成" else echo "${node}----> docker install false失败" fi done
在172.168.32.41上使用脚本批量安装给kuberntes所有master和node节点安装docker
[root@harbor apps]#bash docker_scp.sh
配置docker的阿里云加速
cat > /etc/docker/daemon.json <<EOF { "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": { "max-size": "100m" }, "storage-driver": "overlay2", "storage-opts": [ "overlay2.override_kernel_check=true" ], "registry-mirrors": ["https://uyah70su.mirror.aliyuncs.com"] } EOF systemctl daemon-reload systemctl restart docker
cat > /etc/yum.repos.d/kubernetes.repo << EOF [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF yum makecache
安装版本号为v1.20
yum install -y kubelet-1.20.0 kubeadm-1.20.0 kubectl-1.20.0 systemctl enable kubelet #先不要启动，后面由kubeadm来启动
4.1 kubernetes 初始化
kubeadm init \ --apiserver-advertise-address=172.168.32.201 \ --control-plane-endpoint=172.168.32.248 \ --apiserver-bind-port=6443 \ --kubernetes-version=v1.20.0 \ --pod-network-cidr=10.244.0.0/16 \ --service-cidr=10.96.0.0/16 \ --service-dns-domain=cluster.local \ --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers \ --upload-certs \ --ignore-preflight-errors=swap
--apiserver-advertise-address=172.168.32.201 #kubernetes要监听的本地IP --control-plane-endpoint=172.168.32.248 #为控制平台指定一个稳定的 IP 地址或 DNS 名称，即配置一个可以长期使用切是高可用的 VIP 或者域名，k8s多 master 高可用基于此参数实现 --apiserver-bind-port=6443 #apisever绑定的端口号，默认为6443 --kubernetes-version=v1.20.0 #指定安装的kubernetes版本，一般为kubeadm version --pod-network-cidr=10.244.0.0/16 #pod ip的地址范围 --service-cidr=10.96.0.0/16 #service ip的地址范围 --service-dns-domain=cluster.local #设置 k8s 内部域名，默认为 cluster.local，会有相应的 DNS 服务(kube-dns/coredns)解析生成的域名记录。 --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers #设置一个镜像仓库，默认为 k8s.gcr.io --upload-certs #更新证书，用于添加master节点 --ignore-preflight-errors=swap #可以忽略检查过程 中出现的错误信息，比如忽略 swap，如果为 all就忽略所有。
仅在一台master节点上配置，这里在k8s-master01 172.168.32.201上配置
[root@k8s-master01 ~]# kubeadm init \ --apiserver-advertise-address=172.168.32.201 \ --control-plane-endpoint=172.168.32.248 \ --apiserver-bind-port=6443 \ --kubernetes-version=v1.20.0 \ --pod-network-cidr=10.244.0.0/16 \ --service-cidr=10.96.0.0/16 \ --service-dns-domain=cluster.local \ --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers \ --upload-certs \ --ignore-preflight-errors=swap ...... Your Kubernetes control-plane has initialized successfully! #使用集群的配置步骤 To start using your cluster, you need to run the following as a regular user: mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config Alternatively, if you are the root user, you can run: export KUBECONFIG=/etc/kubernetes/admin.conf #部署集群网络 You should now deploy a pod network to the cluster. Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at: https://kubernetes.io/docs/concepts/cluster-administration/addons/ #添加master节点 You can now join any number of the control-plane node running the following command on each as root: kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b \ --control-plane --certificate-key a552bdb7c4844682faeff86f6a4eaedd28c5ca52769cc9178e56b5bc245e9fc7 #token过期，创建新的token Please note that the certificate-key gives access to cluster sensitive data, keep it secret! As a safeguard, uploaded-certs will be deleted in two hours; If necessary, you can use "kubeadm init phase upload-certs --upload-certs" to reload certs afterward. #添加node节点 Then you can join any number of worker nodes by running the following on each as root: kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b
[root@k8s-master01 ~]# mkdir -p $HOME/.kube [root@k8s-master01 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@k8s-master01 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config [root@k8s-master01 ~]# export KUBECONFIG=/etc/kubernetes/admin.conf [root@k8s-master01 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master01 NotReady control-plane,master 5m6s v1.20.0 #NotReady状态是因为还没有配置集群网络插件
4.3 配置集群网络插件Calico
注意：只需要部署下面其中一个，推荐Calico。
Calico是一个纯三层的数据中心网络方案，Calico支持广泛的平台，包括Kubernetes、OpenStack等。
此外，Calico 项目还实现了 Kubernetes 网络策略，提供ACL功能。
https://docs.projectcalico.org/getting-started/kubernetes/quickstart
下载calico.yaml
mkdir /apps cd /apps wget https://docs.projectcalico.org/manifests/calico.yaml
下载完后还需要修改里面定义Pod网络（CALICO_IPV4POOL_CIDR），与前面kubeadm init指定的一样
把CALICO_IPV4POOL_CIDR必须与master初始化时的--pod-network-cidr=10.244.0.0/16一致，修改下面信息 #- name: CALICO_IPV4POOL_CIDR # value: "192.168.0.0/16" 改为 - name: CALICO_IPV4POOL_CIDR value: "10.244.0.0/16"
运行calico.yaml文件
[root@k8s-master01 apps]# kubectl apply -f calico.yaml configmap/calico-config created customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created clusterrole.rbac.authorization.k8s.io/calico-node created clusterrolebinding.rbac.authorization.k8s.io/calico-node created daemonset.apps/calico-node created serviceaccount/calico-node created deployment.apps/calico-kube-controllers created serviceaccount/calico-kube-controllers created poddisruptionbudget.policy/calico-kube-controllers created [root@k8s-master01 apps]# kubectl get pods -n kube-system NAME READY STATUS RESTARTS AGE calico-kube-controllers-7f4f5bf95d-c9gn8 1/1 Running 0 5m43s calico-node-882fl 1/1 Running 0 5m43s coredns-54d67798b7-5dc67 1/1 Running 0 22m coredns-54d67798b7-kxdgz 1/1 Running 0 22m etcd-k8s-master01 1/1 Running 0 22m kube-apiserver-k8s-master01 1/1 Running 0 22m kube-controller-manager-k8s-master01 1/1 Running 0 22m kube-proxy-5g22z 1/1 Running 0 22m kube-scheduler-k8s-master01 1/1 Running 0 22m #calico已经部署完成 [root@k8s-master01 apps]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master01 Ready control-plane,master 23m v1.20.0 #calico网络部署完成，集群状态变为Ready
在其他master节点172.168.32.202和172.168.32.203上操作，如下命令
kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b \ --control-plane --certificate-key a552bdb7c4844682faeff86f6a4eaedd28c5ca52769cc9178e56b5bc245e9fc7
k8s-master02 172.168.32.202
To start administering your cluster from this node, you need to run the following as a regular user: mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config Run 'kubectl get nodes' to see this node join the cluster.
k8s-master03 172.168.32.203
...... To start administering your cluster from this node, you need to run the following as a regular user: mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config Run 'kubectl get nodes' to see this node join the cluster.
配置k8s-master02和k8s-master03的集群使用环境
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
master节点添加完成
[root@k8s-master01 apps]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master01 Ready control-plane,master 37m v1.20.0 k8s-master02 Ready control-plane,master 2m34s v1.20.0 k8s-master03 Ready control-plane,master 3m29s v1.20.0
在所有node节点172.168.32.204 172.168.32.205 172.168.32.206上执行如下命令
kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b
k8s-node01 172.168.32.204
[root@k8s-node01 ~]# kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ > --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml' [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Starting the kubelet [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap... This node has joined the cluster: * Certificate signing request was sent to apiserver and a response was received. * The Kubelet was informed of the new secure connection details. Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
k8s-node02 172.168.32.205
[root@k8s-node02k8s-node03 172.168.32.206 ~]# kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ > --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml' [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Starting the kubelet [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap... This node has joined the cluster: * Certificate signing request was sent to apiserver and a response was received. * The Kubelet was informed of the new secure connection details. Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
k8s-node03 172.168.32.206
[root@k8s-node03 ~]# kubeadm join 172.168.32.248:6443 --token o1yuan.zos9j6zkar9ldlbc \ > --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml' [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Starting the kubelet [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap... This node has joined the cluster: * Certificate signing request was sent to apiserver and a response was received. * The Kubelet was informed of the new secure connection details. Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
在master节点上使用"kubectl get nodes"查看kubernetes集群状态
[root@k8s-master01 apps]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master01 Ready control-plane,master 52m v1.20.0 k8s-master02 Ready control-plane,master 17m v1.20.0 k8s-master03 Ready control-plane,master 18m v1.20.0 k8s-node01 Ready <none> 10m v1.20.0 k8s-node02 Ready <none> 10m v1.20.0 k8s-node03 Ready <none> 10m v1.20.0
https://raw.githubusercontent.com/kubernetes/dashboard/v2.2.0/aio/deploy/recommended.yaml下载dashboard清单文件，手动修改service暴露nodeport的端口为30001
dashboard.yaml清单
# Copyright 2017 The Kubernetes Authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. apiVersion: v1 kind: Namespace metadata: name: kubernetes-dashboard --- apiVersion: v1 kind: ServiceAccount metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard --- kind: Service apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: type: NodePort ports: - port: 443 targetPort: 8443 nodePort: 30001 selector: k8s-app: kubernetes-dashboard --- apiVersion: v1 kind: Secret metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-certs namespace: kubernetes-dashboard type: Opaque --- apiVersion: v1 kind: Secret metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-csrf namespace: kubernetes-dashboard type: Opaque data: csrf: "" --- apiVersion: v1 kind: Secret metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-key-holder namespace: kubernetes-dashboard type: Opaque --- kind: ConfigMap apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-settings namespace: kubernetes-dashboard --- kind: Role apiVersion: rbac.authorization.k8s.io/v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard rules: # Allow Dashboard to get, update and delete Dashboard exclusive secrets. - apiGroups: [""] resources: ["secrets"] resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"] verbs: ["get", "update", "delete"] # Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map. - apiGroups: [""] resources: ["configmaps"] resourceNames: ["kubernetes-dashboard-settings"] verbs: ["get", "update"] # Allow Dashboard to get metrics. - apiGroups: [""] resources: ["services"] resourceNames: ["heapster", "dashboard-metrics-scraper"] verbs: ["proxy"] - apiGroups: [""] resources: ["services/proxy"] resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"] verbs: ["get"] --- kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard rules: # Allow Metrics Scraper to get metrics from the Metrics server - apiGroups: ["metrics.k8s.io"] resources: ["pods", "nodes"] verbs: ["get", "list", "watch"] --- apiVersion: rbac.authorization.k8s.io/v1 kind: RoleBinding metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: kubernetes-dashboard subjects: - kind: ServiceAccount name: kubernetes-dashboard namespace: kubernetes-dashboard --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: kubernetes-dashboard roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: kubernetes-dashboard subjects: - kind: ServiceAccount name: kubernetes-dashboard namespace: kubernetes-dashboard --- kind: Deployment apiVersion: apps/v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: replicas: 1 revisionHistoryLimit: 10 selector: matchLabels: k8s-app: kubernetes-dashboard template: metadata: labels: k8s-app: kubernetes-dashboard spec: containers: - name: kubernetes-dashboard image: kubernetesui/dashboard:v2.0.3 imagePullPolicy: Always ports: - containerPort: 8443 protocol: TCP args: - --auto-generate-certificates - --namespace=kubernetes-dashboard # Uncomment the following line to manually specify Kubernetes API server Host # If not specified, Dashboard will attempt to auto discover the API server and connect # to it. Uncomment only if the default does not work. # - --apiserver-host=http://my-address:port volumeMounts: - name: kubernetes-dashboard-certs mountPath: /certs # Create on-disk volume to store exec logs - mountPath: /tmp name: tmp-volume livenessProbe: httpGet: scheme: HTTPS path: / port: 8443 initialDelaySeconds: 30 timeoutSeconds: 30 securityContext: allowPrivilegeEscalation: false readOnlyRootFilesystem: true runAsUser: 1001 runAsGroup: 2001 volumes: - name: kubernetes-dashboard-certs secret: secretName: kubernetes-dashboard-certs - name: tmp-volume emptyDir: {} serviceAccountName: kubernetes-dashboard nodeSelector: "kubernetes.io/os": linux # Comment the following tolerations if Dashboard must not be deployed on master tolerations: - key: node-role.kubernetes.io/master effect: NoSchedule --- kind: Service apiVersion: v1 metadata: labels: k8s-app: dashboard-metrics-scraper name: dashboard-metrics-scraper namespace: kubernetes-dashboard spec: ports: - port: 8000 targetPort: 8000 selector: k8s-app: dashboard-metrics-scraper --- kind: Deployment apiVersion: apps/v1 metadata: labels: k8s-app: dashboard-metrics-scraper name: dashboard-metrics-scraper namespace: kubernetes-dashboard spec: replicas: 1 revisionHistoryLimit: 10 selector: matchLabels: k8s-app: dashboard-metrics-scraper template: metadata: labels: k8s-app: dashboard-metrics-scraper annotations: seccomp.security.alpha.kubernetes.io/pod: 'runtime/default' spec: containers: - name: dashboard-metrics-scraper image: kubernetesui/metrics-scraper:v1.0.4 ports: - containerPort: 8000 protocol: TCP livenessProbe: httpGet: scheme: HTTP path: / port: 8000 initialDelaySeconds: 30 timeoutSeconds: 30 volumeMounts: - mountPath: /tmp name: tmp-volume securityContext: allowPrivilegeEscalation: false readOnlyRootFilesystem: true runAsUser: 1001 runAsGroup: 2001 serviceAccountName: kubernetes-dashboard nodeSelector: "kubernetes.io/os": linux # Comment the following tolerations if Dashboard must not be deployed on master tolerations: - key: node-role.kubernetes.io/master effect: NoSchedule volumes: - name: tmp-volume emptyDir: {}
运行dashboard.yaml
[root@k8s-master01 apps]# kubectl apply -f dashboard.yaml namespace/kubernetes-dashboard created serviceaccount/kubernetes-dashboard created service/kubernetes-dashboard created secret/kubernetes-dashboard-certs created secret/kubernetes-dashboard-csrf created secret/kubernetes-dashboard-key-holder created configmap/kubernetes-dashboard-settings created role.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created deployment.apps/kubernetes-dashboard created service/dashboard-metrics-scraper created deployment.apps/dashboard-metrics-scraper created
dashboard相关的service和pod已经在kubernetes-dashboard命令空间下创建完成
[root@k8s-master01 apps]# kubectl get svc -n kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE dashboard-metrics-scraper ClusterIP 10.96.110.28 <none> 8000/TCP 3m11s kubernetes-dashboard NodePort 10.96.56.144 <none> 443:30001/TCP 3m11s [root@k8s-master01 apps]# kubectl get pod -n kubernetes-dashboard NAME READY STATUS RESTARTS AGE dashboard-metrics-scraper-79c5968bdc-tlzbx 1/1 Running 0 2m44s kubernetes-dashboard-9f9799597-l6p4v 1/1 Running 0 2m44s
1、cgroupfs和systemd
[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
在所有master和node节点
sed -i "s/cgroup-driver=systemd/cgroup-driver=cgroupfs/g" /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf systemctl daemon-reload && systemctl restart kubelet
在所有master和node节点,修改docker配置文件
cat > /etc/docker/daemon.json <<EOF { "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": { "max-size": "100m" }, "storage-driver": "overlay2", "storage-opts": [ "overlay2.override_kernel_check=true" ], "registry-mirrors": ["https://uyah70su.mirror.aliyuncs.com"] } EOF
#生成master证书用户添加新master节点 kubeadm init phase upload-certs --upload-certs I0509 18:08:59.985444 7521 version.go:251] remote version is much newer: v1.21.0; falling back to: stable-1.20 [upload-certs] Storing the certificates in Secret "kubeadm-certs" in the "kube-system" Namespace [upload-certs] Using certificate key: f22f123c33009cd57d10b6eebc3d78d7a204cc22eff795298c43c5dd1b452e74 master节点（在新的master上执行） kubeadm join 192.168.32.248:6443 --token edba93.h7pb7iygmvn2kgrm \ --discovery-token-ca-cert-hash sha256:647a8ed047a042d258a0ef79faeb5f458e01e2b5281d553bf5c524d32c65c106 \ --control-plane --certificate-key f22f123c33009cd57d10b6eebc3d78d7a204cc22eff795298c43c5dd1b452e74
#执行kubeadm init时没有记录下加入集群的指令，可以通过以下命令重新创建即可； kubeadm token create --print-join-command
#在master生成新的token kubeadm token create --print-join-command kubeadm join 172.168.32.248:6443 --token x9dqr4.r7n0spisz9scdfbj --discovery-token-ca-cert-hash sha256:7a0c77a53025f28d34033337a0e17971899cbf6cdfdb547aa02b73f99f06005b node节点(在node节点执行) kubeadm join 192.168.32.248:6443 --token edba93.h7pb7iygmvn2kgrm \ --discovery-token-ca-cert-hash sha256:647a8ed047a042d258a0ef79faeb5f458e01e2b5281d553bf5c524d32c65c106
4、集群时间不同步
5、重新创建token来加入node节点
1、重新生成token
[root@k8s-master ~]# kubeadm token create kk0ee6.nhvz5p85avmzyof3 [root@k8s-master ~]# kubeadm token list TOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS bgis60.aubeva3pjl9vf2qx 6h 2020-02-04T17:24:00+08:00 authentication,signing The default bootstrap token generated by 'kubeadm init'. system:bootstrappers:kubeadm:default-node-token kk0ee6.nhvz5p85avmzyof3 23h 2020-02-05T11:02:44+08:00 authentication,signing <none> system:bootstrappers:kubeadm:default-node-token
2、获取ca证书sha256编码hash值
[root@k8s-master ~]# openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //' 9db128fe4c68b0e65c19bb49226fc717e64e790d23816c5615ad6e21fbe92020
3、添加新的node节点k8s-node4
[root@k8s-node4 ~]# kubeadm join --token kk0ee6.nhvz5p85avmzyof3 --discovery-token-ca-cert-hash sha256:9db128fe4c68b0e65c19bb49226fc717e64e790d23816c5615ad6e21fbe92020 192.168.31.35:6443 [preflight] Running pre-flight checks [preflight] Reading configuration from the cluster... [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml' [kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.15" ConfigMap in the kube-system namespace [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Activating the kubelet service [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap... This node has joined the cluster: * Certificate signing request was sent to apiserver and a response was received. * The Kubelet was informed of the new secure connection details. Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
I have a dream so I study hard!!!
