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Kubernetes(K8s)安装部署过程(五)--安装flannel网络插件

时间:2018-01-05 12:20:31      阅读:2042      评论:0      收藏:0      [点我收藏+]

标签:创建   nal   user   命令   ssi   system   ons   服务   安装部署   

node节点需要安装flannel网络插件才能保证所有的pod在一个局域网内通信,直接使用yum安装即可,版本是0.7.1.

1、安装flannel插件:

注意是2个node节点都需要安装,都需要修改service文件和配置文件。

yum install  flannel -y

 

2、修改service文件/usr/lib/systemd/system/flanneld.service其内容为:

[Unit]
Description=Flanneld overlay address etcd agent
After=network.target
After=network-online.target
Wants=network-online.target
After=etcd.service
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/etc/sysconfig/flanneld
EnvironmentFile=-/etc/sysconfig/docker-network
ExecStart=/usr/bin/flanneld-start   -etcd-endpoints=${FLANNEL_ETCD_ENDPOINTS}   -etcd-prefix=${FLANNEL_ETCD_PREFIX}   $FLANNEL_OPTIONS
ExecStartPost=/usr/libexec/flannel/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/docker
Restart=on-failure

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

 

提示:service文件中所有的变量参数都是读取相应的配置文件里面的,所有要保证前后对应。

修改其配置文件/etc/sysconfig/flanneld 内容如下:

# Flanneld configuration options  

# etcd url location.  Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="https://10.10.90.105:2379,https://10.10.90.106:2379,https://10.10.90.107:2379"

# etcd config key.  This is the configuration key that flannel queries
# For address range assignment
#FLANNEL_ETCD_PREFIX="/atomic.io/network"
FLANNEL_ETCD_PREFIX="/kube-centos/network"

# Any additional options that you want to pass
#FLANNEL_OPTIONS=""
FLANNEL_OPTIONS="-etcd-cafile=/etc/kubernetes/ssl/ca.pem -etcd-certfile=/etc/kubernetes/ssl/kubernetes.pem -etcd-keyfile=/etc/kubernetes/ssl/kubernetes-key.pem"

以上2步是2个node节点都需要做的。

3、在etcd中常见网络配置信息

etcdctl --endpoints=https://10.10.90.105:2379,https://10.10.90.106:2379,https://10.10.90.107:2379 \
  --ca-file=/etc/kubernetes/ssl/ca.pem   --cert-file=/etc/kubernetes/ssl/kubernetes.pem   --key-file=/etc/kubernetes/ssl/kubernetes-key.pem   mkdir /kube-centos/network

#上下是2条命令,在任何节点上创建都行,因为etcd是集群的。
etcdctl --endpoints=https://10.10.90.105:2379,https://10.10.90.106:2379,https://10.10.90.107:2379 \
  --ca-file=/etc/kubernetes/ssl/ca.pem   --cert-file=/etc/kubernetes/ssl/kubernetes.pem   --key-file=/etc/kubernetes/ssl/kubernetes-key.pem   mk /kube-centos/network/config {"Network":"172.30.0.0/16","SubnetLen":24,"Backend":{"Type":"host-gw"}}

 

4、启动flannel服务

systemctl daemon-reload
systemctl enable flanneld
systemctl start flanneld
systemctl status flanneld

 

5、核对相关配置信息:

[root@c7test_node1 ~]# etcdctl --endpoints=${ETCD_ENDPOINTS} >   --ca-file=/etc/kubernetes/ssl/ca.pem >   --cert-file=/etc/kubernetes/ssl/kubernetes.pem >   --key-file=/etc/kubernetes/ssl/kubernetes-key.pem >   ls /kube-centos/network/subnets
#输出
/kube-centos/network/subnets/172.30.87.0-24 /kube-centos/network/subnets/172.30.92.0-24 #说明,有几个node就有几个子网络,就有几条记录,我是2个node,分别安装了flannel插件


 [root@c7test_node1 ~]# etcdctl --endpoints=${ETCD_ENDPOINTS} \
 > --ca-file=/etc/kubernetes/ssl/ca.pem \
 > --cert-file=/etc/kubernetes/ssl/kubernetes.pem \
 > --key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
 > get /kube-centos/network/config

 #输出
 {"Network":"172.30.0.0/16","SubnetLen":24,"Backend":{"Type":"host-gw"}}

 #此处是查看主网络配置

 etcdctl --endpoints=${ETCD_ENDPOINTS} --ca-file=/etc/kubernetes/ssl/ca.pem --cert-file=/etc/kubernetes/ssl/kubernetes.pem --key-file=/etc/kubernete   s/ssl/kubernetes-key.pem get /kube-centos/network/subnets/172.30.92.0-24

 #输出

 

{"PublicIP":"10.10.90.106","BackendType":"vxlan","BackendData":{"VtepMAC":"26:af:ac:26:47:ad"}}

 

 

 etcdctl --endpoints=${ETCD_ENDPOINTS} --ca-file=/etc/kubernetes/ssl/ca.pem --cert-file=/etc/kubernetes/ssl/kubernetes.pem --key-file=/etc/kubernete   s/ssl/kubernetes-key.pem get /kube-centos/network/subnets/172.30.87.0-24

 #输出

 {"PublicIP":"10.10.90.107","BackendType":"vxlan","BackendData":{"VtepMAC":"82:6f:58:94:9f:59"}}

 

 

 

如有以上输出即代表flannel插件安装配置成功,下一篇文章开始安装node节点。

Kubernetes(K8s)安装部署过程(五)--安装flannel网络插件

标签:创建   nal   user   命令   ssi   system   ons   服务   安装部署   

原文地址:https://www.cnblogs.com/netsa/p/8203173.html

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