如何解决sphinx启动报错：sql_connect: failed to load libmysqlclient (or libmariadb)

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问题

在centos 7 下载shpinx 3 后，启动./bin/indexer 或 ./bin/searchd 报错：

ERROR: index 'attr_node': sql_connect: failed to load libmysqlclient (or libmariadb) (DSN=mysql://apps:***@localhost:3306/phalapi).

解决方案

1、尝试添加软链接

# find / -name 'libmysqlclient*'

/usr/lib64/mysql/libmysqlclient.so.18
/usr/lib64/mysql/libmysqlclient.so.18.0.0

# ll /usr/lib64/mysql/libmysqlclient.so.18*

# ln -s /usr/lib64/mysql/libmysqlclient.so.18.0.0 /usr/lib/libmysqlclient.so

但是发现不行。

2、尝试添加环境变量

# vim /etc/ld.so.conf

export LD_LIBRARY_PATH=/usr/lib64/mysql:$LD_LIBRARY_PATH

source后再次执行启动脚本 也不行。

3、修改/etc/ld.so.conf，可以了！

执行：

[root@localhost sphinx-3.1.1]# echo "/usr/lib64/mysql" >> /etc/ld.so.conf && ldconfig

结果，成功了！索引构建与启动都成功了！

[root@localhost sphinx-3.1.1]# ./bin/indexer --all                                   
Sphinx 3.1.1 (commit 612d99f)
Copyright (c) 2001-2018, Andrew Aksyonoff
Copyright (c) 2008-2016, Sphinx Technologies Inc (http://sphinxsearch.com)

using config file './sphinx.conf'...
WARNING: key 'docinfo' was permanently removed from Sphinx configuration. Refer to documentation for details.
WARNING: key 'dict' was permanently removed from Sphinx configuration. Refer to documentation for details.
WARNING: key 'mva_updates_pool' was permanently removed from Sphinx configuration. Refer to documentation for details.
indexing index 'attr_node'...
collected 10 docs, 0.0 MB
sorted 0.0 Mhits, 100.0% done
total 10 docs, 3.7 Kb
total 0.0 sec, 149.3 Kb/sec, 400 docs/sec

[root@localhost sphinx-3.1.1]# ./bin/searchd                
Sphinx 3.1.1 (commit 612d99f)
Copyright (c) 2001-2018, Andrew Aksyonoff
Copyright (c) 2008-2016, Sphinx Technologies Inc (http://sphinxsearch.com)

using config file './sphinx.conf'...
WARNING: key 'docinfo' was permanently removed from Sphinx configuration. Refer to documentation for details.
WARNING: key 'dict' was permanently removed from Sphinx configuration. Refer to documentation for details.
WARNING: key 'mva_updates_pool' was permanently removed from Sphinx configuration. Refer to documentation for details.
listening on all interfaces, port=9312
listening on all interfaces, port=9306
precaching index 'attr_node'
precached 1 indexes in 0.007 sec

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