Nginx 学习笔记(七)如何解决nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
出现:nginx: [emerg] bind() to [::]:80 failed (98: Address already in use) 错误,有以下两种情况
1、80端口被占用
2、ipv4端口和ipv6端口冲突的问题
今天服务器安装了NodeJs,服务器实在卡的不行,就重启了,结果重启后,Nginx没有自动重启。果断的手动重启,结果问题来了
在ubuntu16.04上面尝试启动nginx,使用命令:
sudo /etc/init.d/nginx start
启动不了啊!出错了哎!提示的错误信息:
www@TinywanAliYun:~$ sudo /usr/local/openresty/nginx/sbin/nginx
nginx: [warn] could not build optimal variables_hash, you should increase either variables_hash_max_size: 1024 or variables_hash_bucket_size: 64; ignoring variables_hash_bucket_size
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] still could not bind()
第一种情况,查看80端口是不是被占用了
www@TinywanAliYun:~$ netstat -anp |grep 80
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -
tcp 0 0 内网IP:50852 外网IP:80 ESTABLISHED -
unix 2 [ ACC ] STREAM LISTENING 13580 - /var/run/nscd/socket
unix 3 [ ] STREAM CONNECTED 13809 -
问题上面怎么没有显示进程号
尽然没有仔细的看看这句话,要root权限啊!赶紧切换
这次看来是真有了,怎么是apache2,我都不知道什么时候安装的这个:ab 测试吗?
立马卸掉
重启Openresty,看看情况
果断没报错呀,访问:https://www.tinywan.com/ 一切正常
第二种情况
遇到这种问题我先用中文搜索了一下答案,发现大家都在装逼地说要杀nginx重复的进程。我试了下发现是扯淡,于是看了谷歌搜到的第一个英文页面,老外说是nginx先监听了ipv4的80端口之后又监听了ipv6的80端口,于是就重复占用了。更加坑人的是你去看了端口占用它又把80端口释放了,是不是很囧。 解决方案是编辑nginx的配置文件
我的配置
# 配置HTTP请求重定向
server {
# 监听所有的ipv4的地址
listen 80 default_server;
# 监听所有的ipv6的地址
listen [::]:80 default_server;
server_name _;
# Redirect all HTTP requests to HTTPS with a 301 Moved Permanently response.
return 301 https://$host$request_uri;
# 过滤爬虫
if ($http_user_agent ~* "python|curl|java|wget|httpclient|okhttp") {
return 503;
}
}
修改这一段
listen [::]:80 default_server;
修改后
listen [::]:80 ipv6only=on default_server;
果断重启后,正常
分析一下问题:
刚开始我是Nginx默认开机启动的,但是我今天又搞了个Openresty开启自启动,是不是冲突掉了
直接把Nginx启动脚本删掉 rm /etc/init.d/nginx ,又重启,结果还是不行
那就安装个sysv-rc-conf 工具看看,该命令可以查看到当前系统开启机动服务的情况。
果不其然,任然在开启启动项中呀!!!
我们再来看看通启动相应的服务的脚本文件是否存在
看到了吗!也在这里啊!啊哈
http://www.hankcs.com/appos/linux/fix-nginx-bind-err.html