docker – 负载均衡无法正常工作

weixin_38061848 2019-09-12 11:49:18

我们想测试kubernetes负载平衡.因此,我们创建了一个2节点集群,它运行我们容器的6个副本. Container已运行apache2服务器和php,如果我们浏览hostname.php,它将打印pod名称群集详情：172.16.2.92 – 主人和奴才172.16.2.91 – 奴才 RC和服务细节：前端-controller.json： { "kind":"ReplicationController", "apiVersion":"v1beta3", "metadata":{ "name":"frontend", "labels":{ "name":"frontend" } }, "spec":{ "replicas":6, "selector":{ "name":"frontend" }, "template":{ "metadata":{ "labels":{ "name":"frontend" } }, "spec":{ "containers":[ { "name":"php-hostname", "image":"naresht/hostname", "ports":[ { "containerPort":80, "protocol":"TCP" } ] } ] } } } } 前端-service.json： { "kind":"Service", "apiVersion":"v1beta3", "metadata":{ "name":"frontend", "labels":{ "name":"frontend" } }, "spec":{ "createExternalLoadBalancer": true, "ports": [ { "port":3000, "targetPort":80, "protocol":"TCP" } ], "publicIPs": [ "172.16.2.92"], "selector":{ "name":"frontend" } } } Pod细节：frontend-01bb8,frontend-svxfl和frontend-yki5s在节点172.16.2.91上运行frontend-65ykz,frontend-c1x0d和frontend-y925t正在节点172.16.2.92上运行如果我们浏览172.16.2.92:3000/hostname.php,它会输出POD名称. 问题：在节点172.16.2.92上运行监视-n1 curl 172.16.2.92:3000/hostname.php仅提供该pod(frontend-65ykz,frontend-c1x0d和frontend-y925t).他们没有显示其他节点172.16.2.91 pods.在节点172.16.2.91上运行相同的命令仅提供该pod.他们没有显示其他节点172.16.2.92 pods.在群集外运行相同的命令,仅显示172.16.2.92 pod.但是,如果我们在任何地方运行,我们希望看到所有pod都不是特定的节点pod. 请查看以下详细信息以获取更多信息,并在出现任何问 #kubectl获取节点 NAME LABELS STATUS 172.16.2.91 kubernetes.io/hostname=172.16.2.91 Ready 172.16.2.92 kubernetes.io/hostname=172.16.2.92 Ready #kubectl获取pods POD IP CONTAINER(S) IMAGE(S) HOST LABELS STATUS CREATED MESSAGE frontend-01bb8 172.17.0.84 172.16.2.91/172.16.2.91 name=frontend Running About a minute php-hostname naresht/hostname Running About a minute frontend-65ykz 10.1.64.79 172.16.2.92/172.16.2.92 name=frontend Running About a minute php-hostname naresht/hostname Running About a minute frontend-c1x0d 10.1.64.77 172.16.2.92/172.16.2.92 name=frontend Running About a minute php-hostname naresht/hostname Running About a minute frontend-svxfl 172.17.0.82 172.16.2.91/172.16.2.91 name=frontend Running About a minute php-hostname naresht/hostname Running About a minute frontend-y925t 10.1.64.78 172.16.2.92/172.16.2.92 name=frontend Running About a minute php-hostname naresht/hostname Running About a minute frontend-yki5s 172.17.0.83 172.16.2.91/172.16.2.91 name=frontend Running About a minute php-hostname naresht/hostname Running About a minute kube-dns-sbgma 10.1.64.11 172.16.2.92/172.16.2.92 k8s-app=kube-dns,kubernetes.io/cluster-service=true,name=kube-dns Running 45 hours kube2sky gcr.io/google_containers/kube2sky:1.1 Running 45 hours etcd quay.io/coreos/etcd:v2.0.3 Running 45 hours skydns gcr.io/google_containers/skydns:2015-03-11-001 Running 45 hours #kubectl获取服务 NAME LABELS SELECTOR IP(S) PORT(S) frontend name=frontend name=frontend 192.168.3.184 3000/TCP kube-dns k8s-app=kube-dns,kubernetes.io/cluster-service=true,name=kube-dns k8s-app=kube-dns 192.168.3.10 53/UDP kubernetes component=apiserver,provider=kubernetes <none> 192.168.3.2 443/TCP kubernetes-ro component=apiserver,provider=kubernetes <none> 192.168.3.1 80/TCP #iptables -t nat -L Chain KUBE-PORTALS-CONTAINER (1 references) target prot opt source destination REDIRECT tcp -- anywhere 192.168.3.184 /* default/frontend: */ tcp dpt:3000 redir ports 50734 REDIRECT tcp -- anywhere kube02 /* default/frontend: */ tcp dpt:3000 redir ports 50734 REDIRECT udp -- anywhere 192.168.3.10 /* default/kube-dns: */ udp dpt:domain redir ports 52415 REDIRECT tcp -- anywhere 192.168.3.2 /* default/kubernetes: */ tcp dpt:https redir ports 33373 REDIRECT tcp -- anywhere 192.168.3.1 /* default/kubernetes-ro: */ tcp dpt:http redir ports 60311 Chain KUBE-PORTALS-HOST (1 references) target prot opt source destination DNAT tcp -- anywhere 192.168.3.184 /* default/frontend: */ tcp dpt:3000 to:172.16.2.92:50734 DNAT tcp -- anywhere kube02 /* default/frontend: */ tcp dpt:3000 to:172.16.2.92:50734 DNAT udp -- anywhere 192.168.3.10 /* default/kube-dns: */ udp dpt:domain to:172.16.2.92:52415 DNAT tcp -- anywhere 192.168.3.2 /* default/kubernetes: */ tcp dpt:https to:172.16.2.92:33373 DNAT tcp -- anywhere 192.168.3.1 /* default/kubernetes-ro: */ tcp dpt:http to:172.16.2.92:60311 谢谢

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