node related component installation

docker installation

• Install the latest version of docker

wget -qO- https://get.docker.com/ | sh

kubelet installation

• Download the kubelet executable binary file and place it in the directory / opt/kubernetes/bin
• New directory / var/lib/kubelet
• Add kubelet.service file to / usr/lib/systemd/system/kubelet

[Unit]
Description=Kubernetes Kubelet Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service
Requires=docker.service

[Service]
WorkingDirectory=/var/lib/kubelet
EnvironmentFile=-/opt/kubernetes/cfg/config
EnvironmentFile=-/opt/kubernetes/cfg/kubelet
ExecStart=/opt/kubernetes/bin/kubelet \
            $KUBE_LOGTOSTDERR \
            $KUBE_LOG_LEVEL \
            $KUBELET_API_SERVER \
            $KUBELET_ADDRESS \
            $KUBELET_PORT \
            $KUBELET_HOSTNAME \
            $KUBE_ALLOW_PRIV \
            $KUBELET_POD_INFRA_CONTAINER \ 
            $KUBELET_ARGS
Restart=on-failure
KillMode=process

[Install]
WantedBy=multi-user.target

Boot up

systemctl enable kubelet

Configure the / opt/kubernetes/kubelet configuration file.

###
# kubernetes kubelet (minion) config

# The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
KUBELET_ADDRESS="--address=0.0.0.0"

# The port for the info server to serve on
# KUBELET_PORT="--port=10250"

# You may leave this blank to use the actual hostname
KUBELET_HOSTNAME="--hostname-override=172.16.66.173"

# pod infrastructure container
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=reg.docker.tb/harbor/pod-infrastructure:latest" 

# Add your own!
KUBELET_ARGS="--enable-server=true --enable-debugging-handlers=true --fail-swap-on=false --kubeconfig=/var/lib/kubelet/kubeconfig" 

Then add a configuration file, because 1.9.0 in kubelet no longer uses KUBELET_API_SERVER to communicate with API, but through another yaml configuration.

apiVersion: v1
kind: Config
users:
- name: kubelet
clusters:
- name: kubernetes
  clusters:
    server: http://172.16.66.172:8080
contexts:
  - context:
    cluster: kubernetes
    user: kubelet
  name: service-account-context
current-context: service-account-context

Kube proxy installation

• Download the Kube proxy binary file, directory location / opt / kubernetes / bin / Kube proxy
• Configure kube-proxy.service to / usr/lib/systemd/system/

[Unit]
Description=Kubernetes Kube-Proxy Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/config
EnvironmentFile=-/opt/kubernetes/cfg/proxy
ExecStart=/opt/kubernetes/bin/kube-proxy \
            $KUBE_LOGTOSTDERR \
            $KUBE_LOG_LEVEL \
            $KUBE_MASTER \
            $KUBE_PROXY_ARGS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

• Boot up

systemctl enable kube-proxy

• To configure the / opt/kubernetes/proxy file, you must have

###
# kubernetes proxy config

# default config should be adequate

# Add your own!
KUBE_PROXY_ARGS=""