linux中nginx、mysql安装碰到的问题

发布: 2019-01-14 23:44:42标签: linux

服务器到期新买了一台服务器,记录一下重新安装基本环境碰到了一些问题

安装nginx

1. 启动失败

403 forbidden nginx

解决方案:(个人使用直接用了root账号,修改对应nginx启动用户)

  • vi conf/nginx.conf
  • user 改成对应用户

2. 重启失败

01/var/log/nginx 日志文件:
02nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
03nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
04nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
05nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
06nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
07nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
08nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
09nginx: [emerg] still could not bind()
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解决方案:杀死80端口nginx程序重新启动:

  • lsof -i :80 (发现是nginx在占用)
  • kill [pid]

mysql启动卡在启动命令、或者InnoDB: mmap(137363456 bytes) failed; errno 12

一半是内存过小,centos没有设置swap分区可以通过swap解决

01cat /var/log/mysqld.log 日志:
022019-01-14 23:13:29 6051 [Note] InnoDB: Using atomics to ref count buffer pool pages
032019-01-14 23:13:29 6051 [Note] InnoDB: The InnoDB memory heap is disabled
042019-01-14 23:13:29 6051 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
052019-01-14 23:13:29 6051 [Note] InnoDB: Memory barrier is not used
062019-01-14 23:13:29 6051 [Note] InnoDB: Compressed tables use zlib 1.2.11
072019-01-14 23:13:29 6051 [Note] InnoDB: Using Linux native AIO
082019-01-14 23:13:29 6051 [Note] InnoDB: Using CPU crc32 instructions
092019-01-14 23:13:29 6051 [Note] InnoDB: Initializing buffer pool, size = 128.0M
10InnoDB: mmap(137363456 bytes) failed; errno 12
112019-01-14 23:13:29 6051 [ERROR] InnoDB: Cannot allocate memory for the buffer pool
122019-01-14 23:13:29 6051 [ERROR] Plugin 'InnoDB' init function returned error.
132019-01-14 23:13:29 6051 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
142019-01-14 23:13:29 6051 [ERROR] Unknown/unsupported storage engine: InnoDB
152019-01-14 23:13:29 6051 [ERROR] Aborting
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解决方案:(以下是网上答案)

  • dd if=/dev/zero of=/swap bs=1M count=512 # 创建一个swap文件,大小为512M

  • mkswap /swap # 将swap文件变为swap分区文件

  • swapon /swap # 将其映射为swap分区

  • vi /etc/fstab # 在其中添加如下一行 /swap swap swap defaults 0 0