nginx - OpenWhisk Nginx Pod CrashLoopBackOff

Question

我是OpenWhisk的新手，在安装过程中遇到了一些困难。
由于Pod中的错误，Ngnix Pod正在CrashLoopBackOff中运行。

2018/07/02 16:14:27 [emerg] 1#1: host not found in resolver "kube-dns.kube-system" in /etc/nginx/nginx.conf:41
nginx: [emerg] host not found in resolver "kube-dns.kube-system" in /etc/nginx/nginx.conf:41

我无法跳入Pod本身，但是我运行了一个Docker容器，其中包含Pod正在使用的相同镜像，并在nginx.conf中进行了查看:

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

当我查看conf.d目录时，我发现了一个default.conf文件，其中server_name设置为localhost:

server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;
    #access_log  /var/log/nginx/log/host.access.log  main;

    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    #location ~ \.php$ {
    #    root           html;
    #    fastcgi_pass   127.0.0.1:9000;
    #    fastcgi_index  index.php;
    #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
    #    include        fastcgi_params;
    #}

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}

我相信这是造成问题的原因，而kube.dns服务无法解析本地主机。

但是，我不知道如何解决此问题或至少解决该问题。
也许我可以在Ngnix部署中为Pod设置一个静态主机名，然后将该主机名输入到ngnix配置中？

有人可以提供解决方法吗？

非常感谢。

Answer 1

您是否正在使用“在Kubernetes上进行OpenWhisk部署(https://github.com/apache/incubator-openwhisk-deploy-kube)项目？

我怀疑您可能遇到了README.md中描述的Kubernetes错误:

However, multiple minor releases of Kubernetes, including 1.8.9 and 1.9.4 will not work for OpenWhisk due to bugs with volume mount subpaths (see[1]). This bug will surface as a failure when deploying the nginx container.

解决此问题的方法是使用没有卷安装子路径错误的Kubernetes版本。