centos7.x下環境搭建(二)—nginx安裝

上篇文章是對mysql的安裝，接着上篇文章，這篇文章安裝nginx服務

添加yum源

默認狀況Centos7中無Nginx的源，最近發現Nginx官網提供了Centos的源地址。所以能夠以下執行命令添加源：

rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm

安裝Nginx

1. 經過yum search nginx看看是否已經添加源成功。若是成功則執行下列命令安裝Nginx。

yum install -y nginx

1. 啓動Nginx並設置開機自動運行

systemctl start nginx.service
systemctl enable nginx.service

1. 開啓nginx服務後能夠直接經過ip訪問

http://ip   默認80端口

若沒法訪問 ，須要在iptable上添加80端口，若是用的阿里雲或騰訊雲還須要添加安全組

CentOS中iptables防火牆 開放80端口方法

1. 開放端口

iptables -I INPUT -p tcp --dport 80 -j ACCEPT

1. 保存配置

service iptables save

1. 重啓防火牆

service iptables restart

1. 查看配置

service iptables status

nginx相關路徑

1. /etc/nginx/ 安裝路徑
2. /usr/share/nginx 部署路徑
3. cat /var/log/nginx/error.log 錯誤日誌

問題總結

1. systemctl start nginx啓動報錯

Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.

執行如下命令查看服務狀態

systemctl status nginx

nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 四 2019-05-30 14:34:48 CST; 1min 35s ago
     Docs: http://nginx.org/en/docs/
  Process: 6051 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=1/FAILURE)
 Main PID: 1542 (code=killed, signal=KILL)

5月 30 14:34:45 iz2ze3bc56k6c8wubzxn9kz nginx[6051]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
5月 30 14:34:46 iz2ze3bc56k6c8wubzxn9kz nginx[6051]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
5月 30 14:34:46 iz2ze3bc56k6c8wubzxn9kz nginx[6051]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
5月 30 14:34:47 iz2ze3bc56k6c8wubzxn9kz nginx[6051]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
5月 30 14:34:47 iz2ze3bc56k6c8wubzxn9kz nginx[6051]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
5月 30 14:34:48 iz2ze3bc56k6c8wubzxn9kz systemd[1]: nginx.service: control process exited, code=exited status=1
5月 30 14:34:48 iz2ze3bc56k6c8wubzxn9kz nginx[6051]: nginx: [emerg] still could not bind()
5月 30 14:34:48 iz2ze3bc56k6c8wubzxn9kz systemd[1]: Failed to start nginx - high performance web server.
5月 30 14:34:48 iz2ze3bc56k6c8wubzxn9kz systemd[1]: Unit nginx.service entered failed state.
5月 30 14:34:48 iz2ze3bc56k6c8wubzxn9kz systemd[1]: nginx.service failed.

能夠看到以上錯誤是由於端口被佔用的緣由

查看nginx服務
ps -ef | grep nginx

殺死進程
pkill -9 nginx

再啓動就能夠了
systemctl start nginx