root@ubuntu:~/nginx_ingress# cat nginx-configmap.yaml apiVersion: v1 kind: ConfigMap metadata: name: nginx-conf data: nginx.conf: | user nginx; worker_processes 3; error_log /var/log/nginx/error.log; events { worker_connections 10240; } http { log_format main 'remote_addr:$remote_addr ' 'time_local:$time_local ' 'method:$request_method ' 'uri:$request_uri ' 'host:$host ' 'status:$status ' 'bytes_sent:$body_bytes_sent ' 'referer:$http_referer ' 'useragent:$http_user_agent ' 'forwardedfor:$http_x_forwarded_for ' 'request_time:$request_time'; access_log /var/log/nginx/access.log main; server { listen 80; server_name _; location / { root html; index index.html index.htm; } } include /etc/nginx/virtualhost/virtualhost.conf; } virtualhost.conf: | upstream app { server localhost:8080; keepalive 1024; } server { listen 80 default_server; root /usr/local/app; access_log /var/log/nginx/app.access_log main; error_log /var/log/nginx/app.error_log; location / { proxy_pass http://app/; proxy_http_version 1.1; } } --- apiVersion: apps/v1 kind: Deployment metadata: name: nginx-config spec: replicas: 1 template: metadata: labels: app: nginx-config spec: containers: - name: nginx image: nginx ports: - containerPort: 80 volumeMounts: - mountPath: /etc/nginx # mount nginx-conf volumn to /etc/nginx readOnly: true name: nginx-conf - mountPath: /var/log/nginx name: log volumes: - name: nginx-conf configMap: name: nginx-conf # place ConfigMap `nginx-conf` on /etc/nginx items: - key: nginx.conf path: nginx.conf - key: virtualhost.conf path: virtualhost/virtualhost.conf # dig directory - name: log emptyDir: {} --- apiVersion: v1 kind: Service metadata: name: nginx spec: type: LoadBalancer ports: - port: 80 targetPort: 80 selector: app: nginx-config
root@ubuntu:~/nginx_ingress# kubectl create -f nginx-configmap.yaml Error from server (AlreadyExists): error when creating "nginx-configmap.yaml": configmaps "nginx-conf" already exists error validating "nginx-configmap.yaml": error validating data: ValidationError(Deployment.spec): missing required field "selector" in io.k8s.api.apps.v1.DeploymentSpec; if you choose to ignore these errors, turn validation off with --validate=false root@ubuntu:~/nginx_ingress#
root@ubuntu:~/nginx_ingress# cat nginx-configmap.yaml apiVersion: v1 kind: ConfigMap metadata: name: nginx-conf-test data: nginx.conf: | user nginx; worker_processes 3; error_log /var/log/nginx/error.log; events { worker_connections 10240; } http { log_format main 'remote_addr:$remote_addr ' 'time_local:$time_local ' 'method:$request_method ' 'uri:$request_uri ' 'host:$host ' 'status:$status ' 'bytes_sent:$body_bytes_sent ' 'referer:$http_referer ' 'useragent:$http_user_agent ' 'forwardedfor:$http_x_forwarded_for ' 'request_time:$request_time'; access_log /var/log/nginx/access.log main; server { listen 80; server_name _; location / { root html; index index.html index.htm; } } include /etc/nginx/virtualhost/virtualhost.conf; } virtualhost.conf: | upstream app { server localhost:8080; keepalive 1024; } server { listen 80 default_server; root /usr/local/app; access_log /var/log/nginx/app.access_log main; error_log /var/log/nginx/app.error_log; location / { proxy_pass http://app/; proxy_http_version 1.1; } } --- apiVersion: apps/v1 kind: Deployment metadata: name: nginx-config spec: replicas: 1 selector: matchLabels: app: nginx-config template: metadata: labels: app: nginx-config spec: containers: - name: nginx image: nginx ports: - containerPort: 80 volumeMounts: - mountPath: /etc/nginx # mount nginx-conf volumn to /etc/nginx readOnly: true name: nginx-conf - mountPath: /var/log/nginx name: log volumes: - name: nginx-conf configMap: name: nginx-conf-test # place ConfigMap `nginx-conf` on /etc/nginx items: - key: nginx.conf path: nginx.conf - key: virtualhost.conf path: virtualhost/virtualhost.conf # dig directory - name: log emptyDir: {} --- apiVersion: v1 kind: Service metadata: name: nginx-config-test spec: type: LoadBalancer ports: - port: 80 targetPort: 80 selector: app: nginx-config
root@ubuntu:~/nginx_ingress# kubectl create -f nginx-configmap.yaml configmap/nginx-conf-test created deployment.apps/nginx-config created service/nginx-config-test created root@ubuntu:~/nginx_ingress# kubectl get configmaps nginx-conf-test NAME DATA AGE nginx-conf-test 2 13s root@ubuntu:~/nginx_ingress# kubectl describe configmaps nginx-conf-test Name: nginx-conf-test Namespace: default Labels: <none> Annotations: <none> Data ==== nginx.conf: ---- user nginx; worker_processes 3; error_log /var/log/nginx/error.log; events { worker_connections 10240; } http { log_format main 'remote_addr:$remote_addr ' 'time_local:$time_local ' 'method:$request_method ' 'uri:$request_uri ' 'host:$host ' 'status:$status ' 'bytes_sent:$body_bytes_sent ' 'referer:$http_referer ' 'useragent:$http_user_agent ' 'forwardedfor:$http_x_forwarded_for ' 'request_time:$request_time'; access_log /var/log/nginx/access.log main; server { listen 80; server_name _; location / { root html; index index.html index.htm; } } include /etc/nginx/virtualhost/virtualhost.conf; } virtualhost.conf: ---- upstream app { server localhost:8080; keepalive 1024; } server { listen 80 default_server; root /usr/local/app; access_log /var/log/nginx/app.access_log main; error_log /var/log/nginx/app.error_log; location / { proxy_pass http://app/; proxy_http_version 1.1; } } Events: <none>
root@ubuntu:~/nginx_ingress# kubectl exec -it nginx-config-7775cff659-8pf2v -- sh # ps -elf | grep nginx sh: 1: ps: not found # top sh: 2: top: not found # ls /etc/nginx/virtualhost/virtualhost.conf /etc/nginx/virtualhost/virtualhost.conf # ^[[A: not foundB # : 4: # # cat /etc/nginx/virtualhost/virtualhost.conf upstream app { server localhost:8080; keepalive 1024; } server { listen 80 default_server; root /usr/local/app; access_log /var/log/nginx/app.access_log main; error_log /var/log/nginx/app.error_log; location / { proxy_pass http://app/; proxy_http_version 1.1; } } # ls /var/log/nginx/ access.log app.access_log app.error_log error.log # ls /etc/nginx nginx.conf virtualhost # ^[[A^[[B sh: 10: : not found # cat /etc ^H^H cat: /etc: Is a directory cat: ''$'': No such file or directory # cat 、^H cat: ''$'343200201': No such file or directory # cat /etc ^H
root@ubuntu:~/nginx_ingress# kubectl exec -it nginx-config-7775cff659-8pf2v -- /bin/bash root@nginx-config-7775cff659-8pf2v:/# ls /etc/nginx nginx.conf virtualhost root@nginx-config-7775cff659-8pf2v:/# cat /etc/nginx/nginx.conf user nginx; worker_processes 3; error_log /var/log/nginx/error.log; events { worker_connections 10240; } http { log_format main 'remote_addr:$remote_addr ' 'time_local:$time_local ' 'method:$request_method ' 'uri:$request_uri ' 'host:$host ' 'status:$status ' 'bytes_sent:$body_bytes_sent ' 'referer:$http_referer ' 'useragent:$http_user_agent ' 'forwardedfor:$http_x_forwarded_for ' 'request_time:$request_time'; access_log /var/log/nginx/access.log main; server { listen 80; server_name _; location / { root html; index index.html index.htm; } } include /etc/nginx/virtualhost/virtualhost.conf; } root@nginx-config-7775cff659-8pf2v:/# cat /etc/nginx/virtualhost/virtualhost.conf upstream app { server localhost:8080; keepalive 1024; } server { listen 80 default_server; root /usr/local/app; access_log /var/log/nginx/app.access_log main; error_log /var/log/nginx/app.error_log; location / { proxy_pass http://app/; proxy_http_version 1.1; } } root@nginx-config-7775cff659-8pf2v:/#
但是修改配置文件后的内容，容器里不能自动更新，必须对该容器进行删除（不能进行软重启），重新运行，会导致业务中断，短暂数据丢失的可能发生。
更改worker_processes
root@ubuntu:~/nginx_ingress# kubectl describe cm nginx-conf-test Name: nginx-conf-test Namespace: default Labels: <none> Annotations: <none> Data ==== nginx.conf: ---- user nginx; worker_processes 4; error_log /var/log/nginx/error.log; events { worker_connections 10240; }
root@ubuntu:~/nginx_ingress# kubectl exec -it nginx-config-7775cff659-8pf2v -- /bin/bash root@nginx-config-7775cff659-8pf2v:/# cat /etc/nginx/nginx.conf user nginx; worker_processes 3; error_log /var/log/nginx/error.log; events { worker_connections 10240; } http { log_format main 'remote_addr:$remote_addr ' 'time_local:$time_local ' 'method:$request_method ' 'uri:$request_uri ' 'host:$host ' 'status:$status ' 'bytes_sent:$body_bytes_sent ' 'referer:$http_referer ' 'useragent:$http_user_agent ' 'forwardedfor:$http_x_forwarded_for ' 'request_time:$request_time'; access_log /var/log/nginx/access.log main; server { listen 80; server_name _; location / { root html; index index.html index.htm; } } include /etc/nginx/virtualhost/virtualhost.conf; }