[在minion节点]
修改启动服务的参数
vim start_k8s_minion.sh
#添加
dns_ip="172.100.10.1"
#增加--cluster-dns --cluster-domain
nohup kubelet --address=0.0.0.0 --port=10250 --v=1 --log_dir=/var/log/k8s/kubelet --hostname_override=$local_ip --api_servers=http://$master_ip:8080 --cluster-dns=$dns_ip --cluster-domain=cluster.local. --logtostderr=false &
重启服务
./start_k8s_minion.sh
下载相关镜像，由于国外镜像被墙，所以下载国内第三方镜像
docker pull chasontang/kubedns-amd64:1.7
docker pull chasontang/kube-dnsmasq-amd64:1.3
docker pull chasontang/exechealthz-amd64:1.1
给镜像打标签
docker tag chasontang/kubedns-amd64:1.7 gcr.io/google_containers/kubedns-amd64:1.7
docker tag chasontang/kube-dnsmasq-amd64:1.3 gcr.io/google_containers/kube-dnsmasq-amd64:1.3
docker tag chasontang/exechealthz-amd64:1.1 gcr.io/google_containers/exechealthz-amd64:1.1
[在master节点]
准备dns的yaml文件
dns yaml文件位置： /root/kubernetes/cluster/addons/dns
文件名称：
skydns-rc.yaml.in
skydns-svc.yaml.in
cd /root/kubernetes/cluster/addons/dns
cp skydns-rc.yaml.in skydns-svc.yaml.in /root/
cd /root/
mv skydns-rc.yaml.in skydns-rc.yaml
mv skydns-svc.yaml.in skydns-svc.yaml
编辑dns的yaml文件
vim skydns-rc.yaml
replicas: {{ pillar['dns_replicas'] }}
修改为
replicas: 1
args:
# command = "/kube-dns"
- --domain={{ pillar['dns_domain'] }}.
- --dns-port=10053
{{ pillar['federations_domain_map'] }}
修改为
args:
# command = "/kube-dns"
- --domain=cluster.local.
- --dns-port=10053
- --kube-master-url=http://10.2.1.11:8080
- -cmd=nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.{{ pillar['dns_domain'] }} 127.0.0.1:10053 >/dev/null
修改为
- -cmd=nslookup kubernetes.default.svc.cluster.local. 127.0.0.1 >/dev/null && nslookup kubernetes.default.svc.cluster.local. 127.0.0.1:10053 >/dev/null
vim skydns-svc.yaml
clusterIP: {{ pillar['dns_server'] }}
修改为
clusterIP: 172.100.10.1
启动rc与svc
kubectl create -f skydns-rc.yaml
kubectl create -f skydns-svc.yaml
测试
vim test.yaml
apiVersion: v1
kind: ReplicationController
metadata:
name: test
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
app: test
spec:
containers:
- name: test
image: 10.2.3.223:5000/base:v1.2.1_autoserver
ports:
- containerPort: 80
protocol: TCP
volumeMounts:
- mountPath: /work
name: test-volume
volumes:
- name: test-volume
hostPath:
path: /work/test
---
kind: Service
apiVersion: v1
metadata:
labels:
app: test
name: test
namespace: kube-system
spec:
type: NodePort
ports:
- port: 80
targetPort: 30080
selector:
app: test
启动
kubectl create -f test.yaml
测试，登陆的刚刚启动容器
ssh 172.100.35.3
查看DNS
cat /etc/resolv.conf
search kube-system.svc.cluster.local. svc.cluster.local. cluster.local.
nameserver 172.100.10.1
options ndots:5
ping test
PING test.kube-system.svc.cluster.local (172.100.252.152) 56(84) bytes of data.
可以解析，成功
