k8s安装之DNS
DNS
kubeDns
wget https://storage.googleapis.com/kubernetes-release/release/v1.11.0/kubernetes-server-linux-amd64.tar.gz tar -xzvf kubernetes-server-linux-amd64.tar.gz cd kubernetes tar -zxf kubernetes-src.tar.gz cp cluster/addons/dns/kube-dns/kube-dns.yaml.sed ~/kube-dns/kubedns-service.yaml 修改image地址 #把文件中$DNS_SERVER_IP替换成10.254.0.2 sed -i ‘s/$DNS_SERVER_IP/10.254.0.2/g‘ ./kubedns-service.yaml #把$DNS_DOMAIN替换成cluster.local sed -i ‘s/$DNS_DOMAIN/cluster.local/g‘ ./kubedns-service.yaml 增加父系DNS 修改配置文件kubedns-service.yaml apiVersion: v1 kind: ConfigMap metadata: name: kube-dns namespace: kube-system labels: addonmanager.kubernetes.io/mode: EnsureExists data: stubDomains: | ##此处指定以test.duia.com结尾的域名使用10.0.0.55解析 {"test.duia.com":["10.0.0.55"]} upstreamNameservers: | ##此处指定覆盖上级dns ["223.5.5.5"] 启动 kubectl create -f kubedns-service.yaml 验证 get pods --namespace="kube-system" NAME READY STATUS RESTARTS AGE kube-dns-8498694664-99gqr 3/3 Running 0 38m kubernetes-dashboard-69db8c7745-hdhbg 1/1 Running 1 3h
测试
进入随意一个容器,可以Ping通外网地址
coreDns
配置文件各项目的含义 名称|含义 ---|--- errors|错误会被记录到标准输出 health|可以通过http://localhost:8080/health查看健康状况 kubernetes|根据服务的IP响应DNS查询请求,kubeadm的Cluster Domain和Service CIDR默认为cluster.local和10.95.0.0/12,可以通过--service-dns-domain和--service-cidr参数配置。 prometheus|可以通过http://localhost:9153/metrics获取prometheus格式的监控数据 proxy|本地无法解析后,向上级地址进行查询,默认使用宿主机的 /etc/resolv.conf 配置 cache|缓存时间 [ ~]# kubectl -n kube-system get configmap coredns -o yaml apiVersion: v1 data: Corefile: | .:53 { errors health kubernetes cluster.local in-addr.arpa ip6.arpa { pods insecure upstream fallthrough in-addr.arpa ip6.arpa ttl 30 } prometheus :9153 forward . /etc/resolv.conf cache 30 loop reload loadbalance } kind: ConfigMap metadata: creationTimestamp: "2019-08-22T10:09:36Z" name: coredns namespace: kube-system resourceVersion: "181" selfLink: /api/v1/namespaces/kube-system/configmaps/coredns uid: bb1db052-35c7-4162-8fc6-7ff8fe164ae2
相关推荐
YzhilongY 2020-08-31
windzoone 2020-07-29
kenson 2020-05-15
MissFuTT 2020-06-21
jlccwss 2020-09-11
KevinXC 2020-08-12
oLeiShen 2020-08-01
hxf0 2020-07-10
tianchaoshangguo 2020-06-08
huangzonggui 2020-06-05
beiya 2020-06-03
dahege 2020-05-29
Antech 2020-05-25
oLeiShen 2020-05-15
Antech 2020-05-07
Antech 2020-04-29
localhost0 2020-11-12