Docker Management Artifact-kubernetes-flannel Network chapter

Direct start:

5.1, Flannel Introduction

Flannel is an overlay networking (overlay network) tool designed by the CoreOS team for Kubernetes to help each kuberentes host with CoreOS have a complete subnet. Kubernetes assigns a separate IP address to each pod, which makes it easier for Containers in the same pod to connect to each other, and flannel to set a subnet for the host by creating an overlay grid network (overlay mesh networks) in the cluster 。

5.2. Etcd setting

5.2.1, setting up Fannel network segment

# Etcdctl Set/coreos.com/network/config ' {"Network": "10.2.0.0/16"} '

5.2.2, modifying configuration files

Change the etcd_listen_client_urls= in the/etc/etcd/etcd.conf "Http://localhost:2379″ in the Locahost to 0.0.0.0

5.3. Flannel installation configuration (all node nodes need to be installed)

5.3.1, wget https://github.com/coreos/flannel/releases/download/v0.5.5/flannel-0.5.5-linux-amd64.tar.gz

5.3.2, TAR-XZVF flannel-0.5.5-linux-amd64.tar.gz

5.3.3, installation

Directly copy the extracted two files to the executable directory can be

#cp Flannel-0.5.5/flanneld/usr/bin

#cp Flannel-0.5.5/mk-docker-opts.sh/usr/bin

5.3.4, configuration

Vi/etc/sysconfig/flanneld

Add to:

# Flanneld configuration options

# ETCD URL Location

Flannel_etcd= "http://centos-master:2379"

# ETCS Config key

flannel_etcd_key= "/coreos.com/network"

# any additonal options

#FLANNEL_OPTIONS =

5.3.5, editing service files/usr/lib/systemd/system/flanneld.service

Add to:

[Unit]

Description=flanneld Overlay Address ETCD Agent

After=network.target

Before=docker.service

[Service]

Type=notify

Environmentfile=-/etc/sysconfig/flanneld

Environmentfile=-/etc/sysconfig/docker-network

Execstart=/usr/bin/flanneld \

-ETCD-ENDPOINTS=${FLANNEL_ETCD} \

$FLANNEL _options

[Install]

Requiredby=docker.service

Wantedby=multi-user.target

or start directly:

flanneld-iface=eno16777736-etcd-endpoints= http://centos-master:2379 & (Bind a working NIC)

5.4. Suspension of Docker service

#systemctl Stop Docker

5.6. Execute script (Modify Docker)

#systemctl Start Flanneld

#mk-docker-opts.sh-i

#source/run/flannel/subnet.env

#ifconfig Docker0 ${flannel_subnet}

#systemctl Start Docker

5.7. Testing

On Centos-minion IP A view can see the FLANNEL0 network card information

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This article is from the "Linux" blog, so be sure to keep this source http://syklinux.blog.51cto.com/9631548/1860301

Docker Management Artifact-kubernetes-flannel Network chapter