某些容器出现502错误的网关问题
我在集群中安装了NGINX Ingress，但是当我尝试访问它时却得到502
这些是我安装NGINX Ingress所遵循的步骤
kubectl apply -f common/ns-and-sa.yaml
kubectl apply -f common/default-server-secret.yaml
kubectl apply -f common/nginx-config.yaml
kubectl apply -f common/vs-definition.yaml
kubectl apply -f common/vsr-definition.yaml
kubectl apply -f rbac/rbac.yaml
kubectl apply -f daemon-set/nginx-ingress.yaml
这是我正在尝试从Ingress Controller访问的部署
apiVersion: apps/v1
kind: Deployment
metadata:
name: ngtest
namespace: practice
labels:
app: ngtest
spec:
replicas: 1
selector:
matchLabels:
app: ngtest
template:
metadata:
labels:
app: ngtest
spec:
imagePullSecrets:
- name: testkuldeepsecret
containers:
- name: ngtest
image: nginx:latest
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: ngtest
namespace: practice
labels:
spec:
ports:
- port: 80
targetPort: 80
protocol: TCP
name: http
selector:
app: ngtest
使用集群IP，我可以访问nginx
现在我配置了Ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: practice-ingress
namespace: practice
spec:
rules:
- host: practice.example.com
http:
paths:
- path: /
backend:
serviceName: ngtest
servicePort: 80
入口说明
Name: practice-ingress
Namespace: practice
Address:
Default backend: default-http-backend:80 (<none>)
Rules:
Host Path Backends
---- ---- --------
practice.example.com
/ ngtest:80 (10.32.0.7:80)
Annotations:
kubectl.kubernetes.io/last-applied-configuration: {"apiVersion":"extensions/v1beta1","kind":"Ingress","metadata":{"annotations":{},"name":"practice-ingress","namespace":"practice"},"spec":{"rules":[{"host":"practice.example.com","http":{"paths":[{"backend":{"serviceName":"ngtest","servicePort":80},"path":"/"}]}}]}}
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal AddedOrUpdated 46m nginx-ingress-controller Configuration for practice/practice-ingress was added or updated
Normal AddedOrUpdated 46m nginx-ingress-controller Configuration for practice/practice-ingress was added or updated
很明显，入口会将其转发到端口80，ngtest服务也暴露在端口80
我在主机文件中添加了IP地址和Practice.example.com。
所以当我尝试访问http://practice.example.com时我得到了502
入口NGINX Pod日志
10.32.0.1 - - [14/Mar/2020:07:37:53 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:37:56 [error] 30#30: *13 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/"
2020/03/14 07:37:56 [error] 30#30: *15 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET / HTTP/1.1", upstream: "http://10.32.0.7:80/", host: "practice.example.com"
10.32.0.1 - - [14/Mar/2020:07:37:56 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
10.32.0.1 - - [14/Mar/2020:07:37:56 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:37:59 [error] 30#30: *13 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/"
10.32.0.1 - - [14/Mar/2020:07:37:59 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:43:03 [error] 30#30: *19 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET / HTTP/1.1", upstream: "http://10.32.0.7:80/", host: "practice.example.com"
10.32.0.1 - - [14/Mar/2020:07:43:03 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:43:06 [error] 30#30: *19 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/"
10.32.0.1 - - [14/Mar/2020:07:43:06 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:43:09 [error] 30#30: *19 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET / HTTP/1.1", upstream: "http://10.32.0.7:80/", host: "practice.example.com"
10.32.0.1 - - [14/Mar/2020:07:43:09 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:43:12 [error] 30#30: *19 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/"
10.32.0.1 - - [14/Mar/2020:07:43:12 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:52:07 [error] 30#30: *25 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /practice HTTP/1.1", upstream: "http://10.32.0.7:80/practice", host: "practice.example.com"
10.32.0.1 - - [14/Mar/2020:07:52:07 +0000] "GET /practice HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:52:11 [error] 30#30: *25 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/practice"
10.32.0.1 - - [14/Mar/2020:07:52:11 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/practice" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:54:48 [error] 30#30: *29 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/practice"
10.32.0.1 - - [14/Mar/2020:07:54:48 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/practice" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 07:54:58 [error] 30#30: *29 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/practice"
10.32.0.1 - - [14/Mar/2020:07:54:58 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/practice" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 08:13:36 [error] 30#30: *32 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET / HTTP/1.1", upstream: "http://10.32.0.7:80/", host: "practice.example.com"
10.32.0.1 - - [14/Mar/2020:08:13:36 +0000] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
2020/03/14 08:13:39 [error] 30#30: *32 connect() failed (113: No route to host) while connecting to upstream, client: 10.32.0.1, server: practice.example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://10.32.0.7:80/favicon.ico", host: "practice.example.com", referrer: "http://practice.example.com/"
10.32.0.1 - - [14/Mar/2020:08:13:39 +0000] "GET /favicon.ico HTTP/1.1" 502 559 "http://practice.example.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36" "-"
正在运行的资源
root@ip-172-31-12-0:/home/ubuntu# kubectl get all --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system pod/coredns-6955765f44-7fxkh 1/1 Running 0 6d13h
kube-system pod/coredns-6955765f44-l7dkf 1/1 Running 0 6d13h
kube-system pod/etcd-ip-172-31-12-0 1/1 Running 0 6d13h
kube-system pod/kube-apiserver-ip-172-31-12-0 1/1 Running 0 3h2m
kube-system pod/kube-controller-manager-ip-172-31-12-0 1/1 Running 1 6d13h
kube-system pod/kube-proxy-2h672 1/1 Running 1 6d13h
kube-system pod/kube-proxy-7zc4j 1/1 Running 0 6d13h
kube-system pod/kube-scheduler-ip-172-31-12-0 1/1 Running 1 6d13h
kube-system pod/weave-net-wrrml 2/2 Running 0 6d13h
kube-system pod/weave-net-wxjv4 2/2 Running 4 6d13h
nginx-ingress pod/nginx-ingress-9hsck 1/1 Running 0 58m
nginx-ingress pod/nginx-ingress-xvhfg 1/1 Running 0 58m
practice pod/customer-855c6d9bc8-8pq8v 1/1 Running 0 14h
practice pod/ngtest-6c5ff8c7df-2867b 1/1 Running 0 46m
practice pod/some-mysql-7896cfbb4c-zlpl8 1/1 Running 0 38h
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 6d13h
kube-system service/kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 6d13h
practice service/customer-service ClusterIP 10.110.222.12 <none> 80/TCP 14h
practice service/ngtest ClusterIP 10.105.115.222 <none> 80/TCP 46m
practice service/some-mysql ClusterIP None <none> 3306/TCP 38h
NAMESPACE NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
kube-system daemonset.apps/kube-proxy 2 2 2 2 2 beta.kubernetes.io/os=linux 6d13h
kube-system daemonset.apps/weave-net 2 2 2 2 2 <none> 6d13h
nginx-ingress daemonset.apps/nginx-ingress 2 2 2 2 2 <none> 58m
NAMESPACE NAME READY UP-TO-DATE AVAILABLE AGE
kube-system deployment.apps/coredns 2/2 2 2 6d13h
practice deployment.apps/customer 1/1 1 1 14h
practice deployment.apps/ngtest 1/1 1 1 46m
practice deployment.apps/some-mysql 1/1 1 1 38h
NAMESPACE NAME DESIRED CURRENT READY AGE
kube-system replicaset.apps/coredns-6955765f44 2 2 2 6d13h
practice replicaset.apps/customer-855c6d9bc8 1 1 1 14h
practice replicaset.apps/ngtest-6c5ff8c7df 1 1 1 46m
practice replicaset.apps/some-mysql-7896cfbb4c 1 1 1 38h
2 个答案:
答案 0 :(得分：1)
public class BookFragment extends Fragment {
private FragmentBookBinding mBinding;
private BookViewModel mBookViewModel;
private BookAdapter adapter;
public BookFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_book, container, false);
mBookViewModel = new ViewModelProvider(this).get(BookViewModel.class);
adapter = new BookAdapter(getContext(), mBookViewModel);
mBinding.recycler.setAdapter(adapter);
mBinding.recycler.setLayoutManager(new LinearLayoutManager(getContext()));
mBookViewModel.getAllBooks().observe(this, books -> adapter.setBooks(books));
// to make all searchView box clickable
mBinding.searchView.setOnClickListener(v -> mBinding.searchView.setIconified(false));
mBinding.searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return true;
}
});
return mBinding.getRoot();
}
}
意味着nginx入口控制器无法连接到pod IP。检查运行nginx入口控制器的节点与运行pod的节点之间是否有防火墙。
答案 1 :(得分：0)
尝试使用https://github.com/kubernetes/ingress-nginx吗？大多数情况下，我们使用错误的入口。
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