法兰绒和船坞不能启动

Question

我正在尝试使用这个guide在两个节点上设置kubernetes集群，centos7.1。但是，当我尝试在minion上启动服务时，如下所示：

for SERVICES in kube-proxy kubelet docker flanneld; do
    systemctl restart $SERVICES
    systemctl enable $SERVICES
    systemctl status $SERVICES 
done

我得到以下错误：

-- Logs begin at Wed 2015-12-23 13:00:41 UTC, end at Wed 2015-12-23 16:03:54 UTC. --
Dec 23 16:03:47 sc-test2 systemd[1]: docker-storage-setup.service: main process exited, code=exited, status=1/FAILURE
Dec 23 16:03:47 sc-test2 systemd[1]: Failed to start Docker Storage Setup.
-- Subject: Unit docker-storage-setup.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit docker-storage-setup.service has failed.
-- 
-- The result is failed.
Dec 23 16:03:47 sc-test2 systemd[1]: Unit docker-storage-setup.service entered failed state.
Dec 23 16:03:48 sc-test2 flanneld[36477]: E1223 16:03:48.187350 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)
Dec 23 16:03:49 sc-test2 flanneld[36477]: E1223 16:03:49.189860 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)
Dec 23 16:03:50 sc-test2 flanneld[36477]: E1223 16:03:50.192894 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)
Dec 23 16:03:51 sc-test2 flanneld[36477]: E1223 16:03:51.194940 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)
Dec 23 16:03:52 sc-test2 flanneld[36477]: E1223 16:03:52.197222 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)
Dec 23 16:03:53 sc-test2 flanneld[36477]: E1223 16:03:53.199248 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)
Dec 23 16:03:54 sc-test2 flanneld[36477]: E1223 16:03:54.201160 36477 network.go:53] Failed to retrieve network config: 100: Key not found (/atomic.io)

我确信我用etcdctl mk /coreos.com/network/config '{"Network":"172.17.0.0/16"}‘设置了主服务器上的密钥

到目前为止，安装似乎是使用kubernetes最难的部分:(

Answer 1

今天是圣诞节，但我花了一整天的时间试着让它工作:)这就是我所做的：

#1法兰绒

如前所述，我将法兰绒etcd键设置在主机上，如下所示：

etcdctl mk /coreos.com/network/config '{"Network":"172.17.0.0/16"}'

但是当我尝试在minion上开始法兰绒时，我得到了这个错误：

Failed to retrieve network config: 100: Key not found (/atomic.io)

因此，我从以下位置编辑了小程序上的/etc/sysconfig/flanneld文件：

# Flanneld configuration options  

# etcd url location.  Point this to the server where etcd runs
FLANNEL_ETCD="http://master:2379"

# etcd config key.  This is the configuration key that flannel queries
# For address range assignment
FLANNEL_ETCD_KEY="/coreos.com/network"

# Any additional options that you want to pass
#FLANNEL_OPTIONS=""

to:

# Flanneld configuration options  

# etcd url location.  Point this to the server where etcd runs
FLANNEL_ETCD="http://master:2379"

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

# Any additional options that you want to pass
#FLANNEL_OPTIONS=""

即更改了FLANNEL_ETCD密钥。

在此之后，systemctl start flanneld起作用了。

#2 DOCKER

我没有办法让kubernetes作为依赖项安装的版本工作，所以我卸载了它，并按照Centos的docker文档安装了docker-engine，并手动为systemctl创建了一个docker.service文件。

cd /usr/lib/systemd/system

和docker.service的内容：

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network.target docker.socket
Requires=docker.socket
Requires=flanneld.service
After=flanneld.service

[Service]
EnvironmentFile=/etc/sysconfig/flanneld
ExecStart=/usr/bin/docker daemon -H fd:// --bip=${FLANNEL_SUBNET}
Restart=on-failure
RestartSec=5


[Install]
WantedBy=multi-user.target

然后使用systemctl启动并启用守护进程，并查询状态。

systemctl restart docker
systemctl enable docker
systemctl status docker