k8s node node deployment

Docker engine deployment

Install docker on node1 and node2

1. yum install docker

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
yum install -y docker-ce
systemctl start docker

2. Refer to Alibaba Cloud to configure mirroring to speed up restart

systemctl daemon-reload 
systemctl restart docker

flannel network configuration

1. Write the allocated subnet segment to ETCD for use by flannel

[root@master ssl]# ls
ca-key.pem  ca.pem  server-key.pem  server.pem
[root@master ssl]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.176.181:2379,https://192.168.176.182:2379,https://192.168.176.183:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
返回内容
{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

View the written information
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2.Node node configuration flannel network

①Copy to all node nodes (only need to be deployed on node nodes)
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tar xf flannel-v0.10.0-linux-amd64.tar.gz

②Create k8s working directory
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[root@node1 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/

③ vim flannel.sh

#!/bin/bash

ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"}

cat <<EOF >/opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

EOF

systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld

④Execute the script

bash flannel.sh https://192.168.176.181:2379,https://192.168.176.182:2379,https://192.168.176.183:2379

Docker docking with flannel

Edit docker configuration file

vim /usr/lib/systemd/system/docker.service

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Check the docke0 IP address (before the restart takes effect )

restart to take effect

systemctl daemon-reload
systemctl restart docker

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node2 node performs the same operation

test

Run the container '

[root@node1 ~]#  docker run -it centos:7 /bin/bash

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The container on the node1 node ping the container on the node2 node
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