kubbernetes Flannel network deployment (V)

A, Flannel generate a certificate

1. Create Flannel generate a certificate file

[root@linux-node1 ~]# vim flanneld-csr.json
{
  "CN": "flanneld",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}

 2. Generate certificate

[root@linux-node1 ~]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
   -ca-key=/opt/kubernetes/ssl/ca-key.pem \
   -config=/opt/kubernetes/ssl/ca-config.json \
   -profile=kubernetes flanneld-csr.json | cfssljson -bare flanneld

3. distribution certificate

[root@linux-node1 ~]# cp flanneld*.pem /opt/kubernetes/ssl/
[root@linux-node1 ~]# scp flanneld*.pem 192.168.56.12:/opt/kubernetes/ssl/
[root@linux-node1 ~]# scp flanneld*.pem 192.168.56.13:/opt/kubernetes/ssl/

Two, Flannel installation

1. Download Flannel package

[Linux-node1 the root @ ~] # CD / usr / local / the src 
# wget 
 HTTPS: // github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar. GZ 
[the root @ Linux the src-node1] # zxf flannel the tar-V0. 10.0 -linux- amd64.tar.gz 
[the root @ Linux -node1 the src] CP # flanneld mk-docker-opts.sh / opt / Kubernetes / bin / 
copy to Linux - node2 node 
[@ Linux the root -node1 the src] flanneld mk-docker-opts.sh SCP # 192.168 . 56.12 : / opt / Kubernetes / bin / 
[the root @ Linux -node1 the src] MK-docker- flanneld SCP # opts.sh 192.168 . 56.13 : / opt / Kubernetes / bin / 
copy corresponds to the script/ Opt / Kubernetes / Bin eyes录下. 
[Root Atto Linux -Node1 ～] # Cd / Usr / Local / Src / Kubernetes / Cluster / Centos / Node / Bin / 
[Root Atto Linux -Node1 Bin] # Cp Remove-docker0.Sh / Opt / Kubernetes / Bin / 
[ Atto Linux Root -Node1 Bin] # Scp Remove-docker0.Sh 192.168 . 56.12 : / Opt / Kubernetes / Bin / 
[Root Atto Linux -Node1 Bin] # Scp Remove-docker0.Sh 192.168 . 56.13 : / Opt / Kubernetes / Bin /

 

2. Configure Flannel

[root@linux-node1 ~]# vim /opt/kubernetes/cfg/flannel
FLANNEL_ETCD="-etcd-endpoints=https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379"
FLANNEL_ETCD_KEY="-etcd-prefix=/kubernetes/network"
FLANNEL_ETCD_CAFILE="--etcd-cafile=/opt/kubernetes/ssl/ca.pem"
FLANNEL_ETCD_CERTFILE="--etcd-certfile=/opt/kubernetes/ssl/flanneld.pem"
FLANNEL_ETCD_KEYFILE="--etcd-keyfile=/opt/kubernetes/ssl/flanneld-key.pem"
复制配置到其它节点上
[root@linux-node1 ~] # scp / opt / kubernetes / CFG / flannel 192,168 . 56.12 : / opt / kubernetes / CFG / 
[root @ linux -node1 ~] # scp / opt / kubernetes / CFG / flannel 192,168 . 56.13 : / opt / kubernetes / CFG /

3. Set Flannel System Services

[root@linux-node1 ~]# vim /usr/lib/systemd/system/flannel.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network.target
Before=docker.service

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/flannel
ExecStartPre=/opt/kubernetes/bin/remove-docker0.sh
ExecStart=/opt/kubernetes/bin/flanneld ${FLANNEL_ETCD} ${FLANNEL_ETCD_KEY} ${FLANNEL_ETCD_CAFILE} ${FLANNEL_ETCD_CERTFILE} ${FLANNEL_ETCD_KEYFILE}
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -d /run/flannel/docker

Type=notify

[Install]
WantedBy=multi-user.target
RequiredBy=docker.service

 

4, replicated to other nodes


# scp /usr/lib/systemd/system/flannel.service 192.168.56.12:/usr/lib/systemd/system/
# scp /usr/lib/systemd/system/flannel.service 192.168.56.13:/usr/lib/systemd/system/

Three, Flannel CNI integration

1, download the plug-CNI

https: // github.com/containernetworking/plugins/releases 
wget https: // github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz 
[Linux-root @ node1 ~] # mkdir / opt / kubernetes / bin / cm 
[root @ linux -node1 src] # tar zxf CNI-plugins-amd64-V0. 7.1 .tgz -C / opt / kubernetes / bin / cm 
# scp -r / opt / kubernetes / bin / cm / * 192.168.56.12:/opt/kubernetes/bin/cni/ 
# scp -r / opt / kubernetes / bin / cm / * 192.168.56.13:/opt/kubernetes/bin/cni/

 

2, create the key Etcd

/opt/kubernetes/bin/etcdctl --ca-file /opt/kubernetes/ssl/ca.pem --cert-file /opt/kubernetes/ssl/flanneld.pem --key-file /opt/kubernetes/ssl/flanneld-key.pem \
      --no-sync -C https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379 \
mk /kubernetes/network/config '{ "Network": "10.2.0.0/16", "Backend": { "Type": "vxlan", "VNI": 1 }}' >/dev/null 2>&1

 

3, start flannel

[root@linux-node1 ~]# systemctl daemon-reload
[root@linux-node1 ~]# systemctl enable flannel
[root@linux-node1 ~]# chmod +x /opt/kubernetes/bin/*
[root@linux-node1 ~]# systemctl start flannel

 

4, check the service status

[root@linux-node1 ~]# systemctl status flannel

Fourth, the configuration Docker use Flannel

1, modify the file docker.service

[root@linux-node1 ~]# vim /usr/lib/systemd/system/docker.service
[Unit] #在Unit下面修改After和增加Requires
After=network-online.target firewalld.service flannel.service
Wants=network-online.target
Requires=flannel.service

[Service] #增加EnvironmentFile=-/run/flannel/docker
Type=notify
EnvironmentFile=-/run/flannel/docker
ExecStart=/usr/bin/dockerd $DOCKER_OPTS

 

2, replicated to other nodes

# scp /usr/lib/systemd/system/docker.service 192.168.56.12:/usr/lib/systemd/system/
# scp /usr/lib/systemd/system/docker.service 192.168.56.13:/usr/lib/systemd/system/

 

3, restart docker

[root@linux-node1 ~]# systemctl daemon-reload
[root@linux-node1 ~]# systemctl restart docker