| 主机名 | IP | 角色 |
|---|---|---|
| VIP | 20.0.20.200 | master-VIP |
| k8s-master01 | 20.0.20.201 | master |
| k8s-master02 | 20.0.20.202 | master |
| k8s-master03 | 20.0.20.203 | master |
| k8s-node01 | 20.0.20.204 | node |
| k8s-node02 | 20.0.20.205 | node |
| k8s-node03 | 20.0.20.206 | node |
配置master之间的ssh免密登录
sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstabsystemctl start chronyd
systemctl enable chronyd
timedatectl set-timezone "Asia/Shanghai"cat > /etc/sysctl.d/k8s.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
vm.swappiness=0
EOFsysctl -p /etc/sysctl.d/k8s.confcat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
ipvs_modules="ip_vs ip_vs_lc ip_vs_wlc ip_vs_rr ip_vs_wrr ip_vs_lblc ip_vs_lblcr ip_vs_dh ip_vs_sh ip_vs_fo ip_vs_nq ip_vs_sed ip_vs_ftp nf_conntrack_ipv4"
for kernel_module in \${ipvs_modules}; do
/sbin/modinfo -F filename \${kernel_module} > /dev/null 2>&1
if [ $? -eq 0 ]; then
/sbin/modprobe \${kernel_module}
fi
done
EOFchmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep ip_vsyum install -y keepalived haproxy ipvsadm socat# cat /etc/keepalived/keepalived.conf
global_defs {
router_id master01
}
vrrp_instance VI_1 {
state MASTER
interface ens192
virtual_router_id 88
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 2323
}
virtual_ipaddress {
20.0.20.200/24
}
}
三个节点配置区别在于route_id、state、priority这上地方
# cat /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local3
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 32768 #设定每个haproxy进程所接受的最大并发连接数
user haproxy
group haproxy
daemon #以守护进程的方式工作于后台
nbproc 1 #指定启动的haproxy进程的个数
stats socket /var/lib/haproxy/stats
defaults
mode tcp
log global
option tcplog
option dontlognull
option redispatch
retries 3
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout check 10s
listen stats
mode http
bind :8888 #管理页面登陆端口
stats enable #启用管理页面
stats uri /admin?stats #管理页面登陆地址
stats auth admin:admin #管理页面的用户账号
stats admin if TRUE
frontend k8s_https
mode tcp
bind *:8443
maxconn 2000
default_backend https-api
backend https-api
balance roundrobin
server master01 20.0.20.201:6443 check inter 5000 fall 5 rise 3 weight 1
server master01 20.0.20.202:6443 check inter 5000 fall 5 rise 3 weight 1
server master01 20.0.20.203:6443 check inter 5000 fall 5 rise 3 weight 1
systemctl enable keepalived && systemctl start keepalived
systemctl enable haproxy && systemctl start haproxycat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOFyum install -y kubelet kubeadm kubectl --disableexcludes=kubernetessystemctl enable kubelet && systemctl start kubelet# kubeadm config print init-defaults > kubeadm.conf
# cat kubeadm.conf
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 20.0.20.201
bindPort: 6443
nodeRegistration:
criSocket: /var/run/dockershim.sock
name: k8s-master01
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: gcr.azk8s.cn/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.15.3
controlPlaneEndpoint: 20.0.20.200:6443
networking:
dnsDomain: cluster.local
podSubnet: 192.168.0.0/16
serviceSubnet: 10.96.0.0/12
scheduler: {}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
mode: "ipvs"
# kubeadm config images list --config kubeadm.conf
# kubeadm config images pull --config kubeadm.conf
[config/images] Pulled gcr.azk8s.cn/google_containers/kube-apiserver:v1.15.3
[config/images] Pulled gcr.azk8s.cn/google_containers/kube-controller-manager:v1.15.3
[config/images] Pulled gcr.azk8s.cn/google_containers/kube-scheduler:v1.15.3
[config/images] Pulled gcr.azk8s.cn/google_containers/kube-proxy:v1.15.3
[config/images] Pulled gcr.azk8s.cn/google_containers/pause:3.1
[config/images] Pulled gcr.azk8s.cn/google_containers/etcd:3.3.10
[config/images] Pulled gcr.azk8s.cn/google_containers/coredns:1.3.1[root@k8s-master01 ~]# kubeadm init --config kubeadm.conf
[init] Using Kubernetes version: v1.15.3
[preflight] Running pre-flight checks
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Activating the kubelet service
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [k8s-master01 localhost] and IPs [20.0.20.201 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [k8s-master01 localhost] and IPs [20.0.20.201 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [k8s-master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 20.0.20.201 20.0.20.200]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 37.001511 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.15" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --upload-certs
[mark-control-plane] Marking the node k8s-master01 as control-plane by adding the label "node-role.kubernetes.io/master=''"
[mark-control-plane] Marking the node k8s-master01 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
Your Kubernetes control-plane has initialized successfully!
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
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/
You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:
kubeadm join 20.0.20.200:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:52dab3f1cfe0b0c202d676175f1216cf3c5919558d50805d595b74f480bcf75b \
--control-plane
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 20.0.20.200:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:52dab3f1cfe0b0c202d676175f1216cf3c5919558d50805d595b74f480bcf75b [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# cat ./scp_pki.sh
USER=root
IP="20.0.20.202 20.0.20.203"
for host in ${IP}; do
ssh "${USER}"@$host "mkdir -p /etc/kubernetes/pki/etcd"
scp /etc/kubernetes/pki/ca.* "${USER}"@$host:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/sa.* "${USER}"@$host:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/front-proxy-ca.* "${USER}"@$host:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/etcd/ca.* "${USER}"@$host:/etc/kubernetes/pki/etcd/
scp /etc/kubernetes/admin.conf "${USER}"@$host:/etc/kubernetes/
done
[root@k8s-master02 ~]# kubeadm join 20.0.20.200:6443 --token abcdef.0123456789abcdef \
> --discovery-token-ca-cert-hash sha256:52dab3f1cfe0b0c202d676175f1216cf3c5919558d50805d595b74f480bcf75b \
> --control-plane[root@k8s-master02 ~]# mkdir -p $HOME/.kube
[root@k8s-master02 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-master02 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady master 2m27s v1.15.3
k8s-master02 NotReady master 45s v1.15.3
k8s-master03 NotReady master 46s v1.15.3# kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
serviceaccount/weave-net created
clusterrole.rbac.authorization.k8s.io/weave-net created
clusterrolebinding.rbac.authorization.k8s.io/weave-net created
role.rbac.authorization.k8s.io/weave-net created
rolebinding.rbac.authorization.k8s.io/weave-net created
daemonset.extensions/weave-net created
# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-cf8fb6d7f-64hsx 1/1 Running 0 45m
kube-system coredns-cf8fb6d7f-lqws8 1/1 Running 0 45m
kube-system etcd-k8s-master01 1/1 Running 0 44m
kube-system etcd-k8s-master02 1/1 Running 0 43m
kube-system etcd-k8s-master03 1/1 Running 0 44m
kube-system kube-apiserver-k8s-master01 1/1 Running 0 44m
kube-system kube-apiserver-k8s-master02 1/1 Running 0 42m
kube-system kube-apiserver-k8s-master03 1/1 Running 0 44m
kube-system kube-controller-manager-k8s-master01 1/1 Running 1 44m
kube-system kube-controller-manager-k8s-master02 1/1 Running 0 42m
kube-system kube-controller-manager-k8s-master03 1/1 Running 0 44m
kube-system kube-proxy-6gwzs 1/1 Running 0 44m
kube-system kube-proxy-dppmv 1/1 Running 0 37m
kube-system kube-proxy-msz97 1/1 Running 0 43m
kube-system kube-proxy-tgkr9 1/1 Running 0 37m
kube-system kube-proxy-tw4lh 1/1 Running 0 37m
kube-system kube-proxy-zbf5f 1/1 Running 0 45m
kube-system kube-scheduler-k8s-master01 1/1 Running 1 44m
kube-system kube-scheduler-k8s-master02 1/1 Running 0 42m
kube-system kube-scheduler-k8s-master03 1/1 Running 0 44m
kube-system weave-net-6b7px 2/2 Running 0 6m12s
kube-system weave-net-6b8wn 2/2 Running 0 6m12s
kube-system weave-net-dq7sz 2/2 Running 0 6m12s
kube-system weave-net-mfv8t 2/2 Running 0 6m12s
kube-system weave-net-t76p9 2/2 Running 0 6m12s
kube-system weave-net-wctz4 2/2 Running 0 6m12s
[root@k8s-master01 ~]# kubectl get pod -n kube-system | grep kube-proxy
kube-proxy-6gwzs 1/1 Running 0 2m47s
kube-proxy-msz97 1/1 Running 0 2m37s
kube-proxy-zbf5f 1/1 Running 0 4m8s
[root@k8s-master01 ~]# kubectl logs kube-proxy-6gwzs -n kube-system
I0909 06:48:02.103768 1 server_others.go:170] Using ipvs Proxier.
W0909 06:48:02.104548 1 proxier.go:401] IPVS scheduler not specified, use rr by default
I0909 06:48:02.104949 1 server.go:534] Version: v1.15.3
I0909 06:48:02.110944 1 conntrack.go:52] Setting nf_conntrack_max to 131072
I0909 06:48:02.111114 1 config.go:187] Starting service config controller
I0909 06:48:02.111143 1 controller_utils.go:1029] Waiting for caches to sync for service config controller
I0909 06:48:02.111174 1 config.go:96] Starting endpoints config controller
I0909 06:48:02.111184 1 controller_utils.go:1029] Waiting for caches to sync for endpoints config controller
I0909 06:48:02.211286 1 controller_utils.go:1036] Caches are synced for endpoints config controller
I0909 06:48:02.211338 1 controller_utils.go:1036] Caches are synced for service config controller
yum install -y bash-completion
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
[root@k8s-node01 ~]# kubeadm join 20.0.20.200:6443 --token abcdef.0123456789abcdef \
> --discovery-token-ca-cert-hash sha256:52dab3f1cfe0b0c202d676175f1216cf3c5919558d50805d595b74f480bcf75b [root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready master 9m30s v1.15.3
k8s-master02 Ready master 7m48s v1.15.3
k8s-master03 Ready master 7m49s v1.15.3
k8s-node01 Ready <none> 94s v1.15.3
k8s-node02 Ready <none> 91s v1.15.3
k8s-node03 Ready <none> 90s v1.15.3# kubectl run nginx --image=nginx:1.14 --replicas=2
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
deployment.apps/nginx created
# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-7b4d6c6559-82jd7 1/1 Running 0 81s 10.46.0.1 k8s-node03 <none> <none>
nginx-7b4d6c6559-hzlx6 1/1 Running 0 81s 10.45.0.0 k8s-node01 <none> <none>
# curl 10.46.0.1
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
# kubectl run curl --image=radial/busyboxplus:curl -it
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
If you don't see a command prompt, try pressing enter.
[ root@curl-6bf6db5c4f-472s2:/ ]$ nslookup kubernetes.default
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes.default
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
