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You can find all of the config files on the GitHub page.
Install etcd
For info on etcd see the GitHub page.
Perform the following on each of the etcd nodes.
mkdir -p /etc/etcd/
curl -L https://github.com/coreos/etcd/releases/download/v3.0.1/etcd-v3.0.1-linux-amd64.tar.gz -o etcd-v3.0.1-linux-amd64.tar.gz
tar -xvf etcd-v3.0.1-linux-amd64.tar.gz
cp etcd-v3.0.1-linux-amd64/etcd* /usr/bin/
mkdir -p /var/lib/etcd
Configure etcd
Perform the following on each of the etcd nodes.
kube-etcd0
/etc/systemd/system/etcd.service
[Unit] Description=etcd Documentation=https://github.com/coreos [Service] ExecStart=/usr/bin/etcd --name kube-etcd0 \ --cert-file=/etc/etcd/kubernetes.pem \ --key-file=/etc/etcd/kubernetes-key.pem \ --peer-cert-file=/etc/etcd/kubernetes.pem \ --peer-key-file=/etc/etcd/kubernetes-key.pem \ --trusted-ca-file=/etc/etcd/ca.pem \ --peer-trusted-ca-file=/etc/etcd/ca.pem \ --initial-advertise-peer-urls https://kube-etcd0.vmware.local:2380 \ --listen-peer-urls https://kube-etcd0.vmware.local:2380 \ --listen-client-urls https://kube-etcd0.vmware.local:2379 \ --advertise-client-urls https://kube-etcd0.vmware.local:2379 \ --initial-cluster-token etcd-cluster-0 \ --initial-cluster kube-etcd0=https://kube-etcd0.vmware.local:2380,kube-etcd1=https://kube-etcd1.vmware.local:2380,kube-etcd2=https://kube-etcd2.vmware.local:2380 \ --initial-cluster-state new \ --data-dir=/var/lib/etcd Restart=on-failure RestartSec=5 [Install] WantedBy=multi-user.target
kube-etcd1
/etc/systemd/system/etcd.service
[Unit] Description=etcd Documentation=https://github.com/coreos [Service] ExecStart=/usr/bin/etcd --name kube-etcd1 \ --cert-file=/etc/etcd/kubernetes.pem \ --key-file=/etc/etcd/kubernetes-key.pem \ --peer-cert-file=/etc/etcd/kubernetes.pem \ --peer-key-file=/etc/etcd/kubernetes-key.pem \ --trusted-ca-file=/etc/etcd/ca.pem \ --peer-trusted-ca-file=/etc/etcd/ca.pem \ --initial-advertise-peer-urls https://kube-etcd1.vmware.local:2380 \ --listen-peer-urls https://kube-etcd1.vmware.local:2380 \ --listen-client-urls https://kube-etcd1.vmware.local:2379 \ --advertise-client-urls https://kube-etcd1.vmware.local:2379 \ --initial-cluster-token etcd-cluster-0 \ --initial-cluster kube-etcd0=https://kube-etcd0.vmware.local:2380,kube-etcd1=https://kube-etcd1.vmware.local:2380,kube-etcd2=https://kube-etcd2.vmware.local:2380 \ --initial-cluster-state new \ --data-dir=/var/lib/etcd Restart=on-failure RestartSec=5 [Install] WantedBy=multi-user.target
kube-etcd2
/etc/systemd/system/etcd.service
[Unit] Description=etcd Documentation=https://github.com/coreos [Service] ExecStart=/usr/bin/etcd --name kube-etcd2 \ --cert-file=/etc/etcd/kubernetes.pem \ --key-file=/etc/etcd/kubernetes-key.pem \ --peer-cert-file=/etc/etcd/kubernetes.pem \ --peer-key-file=/etc/etcd/kubernetes-key.pem \ --trusted-ca-file=/etc/etcd/ca.pem \ --peer-trusted-ca-file=/etc/etcd/ca.pem \ --initial-advertise-peer-urls https://kube-etcd2.vmware.local:2380 \ --listen-peer-urls https://kube-etcd2.vmware.local:2380 \ --listen-client-urls https://kube-etcd2.vmware.local:2379 \ --advertise-client-urls https://kube-etcd2.vmware.local:2379 \ --initial-cluster-token etcd-cluster-0 \ --initial-cluster kube-etcd0=https://kube-etcd0.vmware.local:2380,kube-etcd1=https://kube-etcd1.vmware.local:2380,kube-etcd2=https://kube-etcd2.vmware.local:2380 \ --initial-cluster-state existing \ --data-dir=/var/lib/etcd Restart=on-failure RestartSec=5 [Install] WantedBy=multi-user.target
Enable and start etcd on each etcd node
systemctl daemon-reload
systemctl enable etcd
systemctl restart etcd
Verify that the service started correctly
systemctl status etcd –no-pager
Verify cluster state
etcdctl –ca-file=/etc/etcd/ca.pem –endpoint https://kube-etcd0.vmware.local:2379 cluster-health
member 2673865ccad1f13b is healthy: got healthy result from https://192.168.3.180:2379 member 3a8b584f84134f4f is healthy: got healthy result from https://192.168.3.181:2379 member 8c75d01c2de98466 is healthy: got healthy result from https://192.168.3.179:2379 cluster is healthy
Create flannel network
When each of our Kubernetes worker nodes come online, they will be given a network from etcd. Kubernetes pods will then be given IPs from these networks. We will see more of this in a later post, but for now let’s just create the networks in etcd.
Create flanneld etcd config
etcdctl –ca-file=/etc/etcd/ca.pem –endpoint https://kube-etcd0.vmware.local:2379 set /coreos.com/network/config ‘{“Network”: “172.16.0.0/16”}’
Get flanneld etcd config
etcdctl –ca-file=/etc/etcd/linuxca-inter.pem –endpoint https://kube-etcd0.vmware.local:2379 get /coreos.com/network/config
