cmake源码编译安装mysql-5.5.32:多实例遇到的坑

坑1：找不到mysql-5.5.32.tar.gz 源码包 费劲了很多力气才找到： mysql 源码包下载地址： https://downloads.mysql.com/archives/community/

下载路径 https://downloads.mysql.com/archives/get/file/mysql-5.5.32.tar.gz 授人以鱼，我是怎么找到的？

坑2：cmake配置报错因为后面有空格导致的，cmake编译参数正确的为如下： cmake . -DCMAKE_INSTALL_PREFIX=/application/mysql-5.5.32 -DMYSQL_DATADIR=/application/mysql-5.5.32/data -DMYSQL_UNIX_ADDR=/application/mysql-5.5.32/tmp/mysql.sock -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DEXTRA_CHARSETS=gbk,gb2312,utf8,ascii -DENABLED_LOCAL_INFILE=ON -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_FEDERATED_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITHOUT_EXAMPLE_STORAGE_ENGINE=1 -DWITHOUT_PARTITION_STORAGE_ENGINE=1 -DWITH_FAST_MUTEXES=1 -DWITH_ZLIB=bundled -DENABLED_LOCAL_INFILE=1 -DWITH_READLINE=1 -DWITH_EMBEDDED_SERVER=1 -DWITH_DEBUG=0

坑3：mysql多实例执行启动后，端口没有启动，查看日志发现报错。 [root@db02 3306]# /data/3306/mysql start Starting MySQL... [root@db02 3306]# /data/3307/mysql start Starting MySQL... [root@db02 3306]# netstat -lntup|grep 330

[root@db02 3306]# cat mysql_oldboy3306.err 180302 12:29:03 mysqld_safe Starting mysqld daemon with databases from /application/3306/data 180302 12:29:03 [Warning] Can't create test file /application/3306/data/db02.lower-test 180302 12:29:03 [Warning] Can't create test file /application/3306/data/db02.lower-test /application/mysql-5.5.32/bin/mysqld: Can't change dir to '/application/3306/data/' (Errcode: 2) 180302 12:29:03 [ERROR] Aborting

180302 12:29:03 [Note] /application/mysql-5.5.32/bin/mysqld: Shutdown complete

180302 12:29:03 mysqld_safe mysqld from pid file /data/3306/mysqld.pid ended

关键报错日志点为： 180302 12:29:03 [Warning] Can't create test file /application/3306/data/db02.lower-test 180302 12:29:03 [Warning] Can't create test file /application/3306/data/db02.lower-test /application/mysql-5.5.32/bin/mysqld: Can't change dir to '/application/3306/data/' (Errcode: 2)

经过仔细检查是因为多实例配置文件中把datadir路径指向了/application/3306/data导致的。 3307实例报错也是一样的。 修改3306和3307多实例my.cnf中的datadir= /data/3307/data 后再启动两个实例后ok [root@db02 3306]# /data/3306/mysql start Starting MySQL... [root@db02 3306]# /data/3307/mysql start Starting MySQL... [root@db02 3306]# netstat -lntup|grep 330 tcp        0      0 0.0.0.0:3306                0.0.0.0:                   LISTEN      19701/mysqld        tcp        0      0 0.0.0.0:3307                0.0.0.0:                   LISTEN      20418/mysqld

虽然折腾了半天，但是仍很欣慰解决了问题，这里需要感谢一下，http://zpz.name/1592/ 给我提供如下参考：让我焕然大悟

**解决编译MySQL后的错误：Can’t change dir to ‘/var/mysql-DMYSQL_UNIX_ADDR=/var/mysql/mysqld.sock/’ 一下时可能的问题和解决方案：

1.可能是/usr/local/mysql/data/rekfan.pid文件没有写的权限 解决方法 ：给予权限，执行 “chown -R mysql:mysql /var/data” “chmod -R 755 /usr/local/mysql/data” 然后重新启动mysqld！

2.可能进程里已经存在mysql进程 解决方法：用命令“ps -ef|grep mysqld”查看是否有mysqld进程，如果有使用“kill -9 进程号”杀死，然后重新启动mysqld！

3.可能是第二次在机器上安装mysql，有残余数据影响了服务的启动。 解决方法：去mysql的数据目录/data看看，如果存在mysql-bin.index，就赶快把它删除掉吧，它就是罪魁祸首了。本人就是使用第三条方法解决的 ！http://blog.rekfan.com/?p=186

4.mysql在启动时没有指定配置文件时会使用/etc/my.cnf配置文件，请打开这个文件查看在[mysqld]节下有没有指定数据目录(datadir)。 解决方法：请在[mysqld]下设置这一行：datadir = /usr/local/mysql/data

5.skip-federated字段问题 解决方法：检查一下/etc/my.cnf文件中有没有没被注释掉的skip-federated字段，如果有就立即注释掉吧。

6.错误日志目录不存在 解决方法：使用“chown” “chmod”命令赋予mysql所有者及权限

7.selinux惹的祸，如果是centos系统，默认会开启selinux 解决方法：关闭它，打开/etc/selinux/config，把SELINUX=enforcing改为SELINUX=disabled后存盘退出重启机器试试。**

4 最后我把正确的多实例的配置文件发一下： [root@db02 3307]# tree /data /data ├── 3306 │   ├── data │   ├── my.cnf │   └── mysql └── 3307 ├── data ├── my.cnf └── mysql 3306的my.cnf

[root@db02 3306]# cat my.cnf [client] port            = 3306 socket          = /data/3306/mysql.sock

[mysql] no-auto-rehash

[mysqld] user            = mysql port            = 3306 socket          = /data/3306/mysql.sock basedir         = /application/mysql datadir         = /data/3306/data open_files_limit  = 1024 back_log =600 max_connections = 800 max_connect_errors = 3000 table_cache = 614 external-locking = FALSE max_allowed_packet = 8M sort_buffer_size = 1M join_buffer_size = 1M thread_cache_size = 100 thread_concurrency = 2 query_cache_size = 2M query_cache_limit = 1M query_cache_min_res_unit = 2K #default_table_type = InnoDB thread_stack = 192K #transaction_isolation = READ-COMMITTED tmp_table_size = 2M max_heap_table_size = 2M long_query_time = 1 pid-file = /data/3306/mysql.pid relay-log = /data/3306/relay-bin relay-log-info-file = /data/3306/relay-log.info binlog_cache_size = 1M max_binlog_cache_size = 1M max_binlog_size = 2M key_buffer_size = 16M read_buffer_size = 1M read_rnd_buffer_size = 1M bulk_insert_buffer_size = 1M lower_case_table_names = 1 skip-name-resolve slave-skip-errors = 1032,1062 replicate-ignore-db = mysql

server-id = 1

innodb_additional_mem_pool_size = 4M innodb_buffer_pool_size = 32M innodb_data_file_path = ibdata1:128M:autoextend innodb_file_io_threads = 4 innodb_thread_concurrency = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 2M innodb_log_file_size = 4M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 innodb_file_per_table = 0 [mysqldump] quick max_allowed_packet = 2M

[mysqld_safe] log-error = /data/3306/mysql_oldboy3306.err pid-file = /data/3306/mysqld.pid

3307的my.cnf和3306一样，只是把3306修改为3307，并且把server-id=1修改为其他数字比如，2，3,4,5等等

3306的mysql启动文件如下：3306的mysql启动文件就是把3306中的启动文件中带3306修改为330即可。 [root@db02 3306]# cat mysql #!/bin/sh ################################################# #this scripts is created by oldboy at 2007-06-09 #oldboy QQ:31333741 #site:http://www.etiantian.org #blog:http://oldboy.blog.51cto.com #oldboy trainning QQ group: 208160987 226199307  44246017 ################################################ #init port=3306 mysql_user="root" mysql_pwd="123456" CmdPath="/application/mysql/bin" mysql_sock="/data/${port}/mysql.sock" #startup function function_start_mysql() { if [ ! -e "$mysql_sock" ];then printf "Starting MySQL... " /bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null & else printf "MySQL is running... " exit fi }

#stop function function_stop_mysql() { if [ ! -e "$mysql_sock" ];then printf "MySQL is stopped... " exit else printf "Stoping MySQL... " ${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown fi }

#restart function function_restart_mysql() { printf "Restarting MySQL... " function_stop_mysql sleep 2 function_start_mysql }

case $1 in start) function_start_mysql ;; stop) function_stop_mysql ;; restart) function_restart_mysql ;; *) printf "Usage: /data/${port}/mysql {start|stop|restart} " esac