封装适用于CentOS7的MySQL离线包

1 构建一个centos7.6.1810的docker镜像,用于下载MySQL+xtrabackup所需安装包

7.6.1810的docker镜像,低版本最小安装,会尽可能把所需的包拉齐。

Dockerfile文件如下

FROM centos:7.6.1810
 
CMD yum install -y https://repo.percona.com/yum/percona-release-latest.noarch.rpm https://repo.mysql.com//mysql80-community-release-el7-7.noarch.rpm epel-release && \
rm -rf /yum/mysql8.0 && mkdir -p /yum/mysql8.0 && \
yum --downloadonly --downloaddir=/yum/mysql8.0 install -y mysql-community-server percona-xtrabackup-80 zip unzip telnet lrzsz iotop ftp python-pip && \
yum-config-manager --disable mysql80-community && yum-config-manager --enable mysql57-community && \
rm -rf /yum/mysql5.7 && mkdir -p /yum/mysql5.7 && \
yum --downloadonly --downloaddir=/yum/mysql5.7 install -y mysql-community-server percona-xtrabackup-24 zip unzip telnet lrzsz iotop ftp python-pip

构建镜像:

docker build -t mysql_xtrabackup_download .

2 运行镜像自动下载MySQL5.7 / 8.0 + 对应版本的xtrabackup安装包

docker run --rm \
  -v /etc/localtime:/etc/localtime \
  -v ${PWD}/yum:/yum \
  mysql_xtrabackup_download

docker容器跑完会自动销毁,并在当前目录的yum文件夹下生成mysql5.7 / mysql8.0两个安装包

传输到无网络的centos7上,可以使用yum localinstall *.rpm进行安装

3 解决冲突

下载的rpm可以用于离线安装,但是安装时会报错

新版本的MySQL已经不再提供libmysqlclient.so.18.1.0,但是xtrabackup需要这个文件,所以就有一个Percona-Server-shared-56-5.6.51-rel91.0.1.el7.x86_64.rpm包提供

这个包又提供了一个/etc/my.cnf文件,导致和MySQL主包冲突,无法安装成功,所以要替换掉它。

Transaction check error:
  试图安装 mysql-community-server-8.0.31-1.el7.x86_64 和 Percona-Server-shared-56-5.6.51-rel91.0.1.el7.x86_64 会导致文件 /etc/my.cnf 冲突

下载Percona-Server-shared-56-5.6.51-rel91.0.1.el7.x86_64.rpm到Windows,解压,得到两个文件

 

 创建文件libmysqlclient.spec

Name:     libmysqlclient
Version:  18.1.0
Release:  1
Summary:  libmysqlclient-18.1.0
Summary(zh_CN):  libmysqlclient-18.1.0
License:  GPLv3+
 
Packager: XX Software
 
%description
libmysqlclient,Resolve MySQL and Xtrabackup installation conflicts
 
%description -l zh_CN
libmysqlclient,解决MySQL和xtrabackup安装冲突
 
%install
mkdir -p %{buildroot}/usr/lib64
install -m 755 -t %{buildroot}/usr/lib64 /usr/lib64/libmysqlclient.so.18.1.0
install -m 755 -t %{buildroot}/usr/lib64 /usr/lib64/libmysqlclient_r.so.18.1.0
 
 
%files
/usr/lib64/libmysqlclient.so.18.1.0
/usr/lib64/libmysqlclient_r.so.18.1.0

创建文件Dockerfile

FROM centos:7.6.1810
 
RUN sed -e 's|^mirrorlist=|#mirrorlist=|g' \
        -e 's|^#baseurl=http://mirror.centos.org|baseurl=https://mirrors.tuna.tsinghua.edu.cn|g' \
        -i.bak \
        /etc/yum.repos.d/CentOS-*.repo && \
    yum install -y rpm-build rpmdevtools
 
CMD cd /tmp/libmysqlclient/ && \
    mkdir -p /usr/lib64 && \
    cp libmysqlclient*.so.18.1.0 /usr/lib64 && \
    rpmbuild -bb libmysqlclient.spec --define "_topdir ${PWD}/rpmbuild"

四个文件放同一个目录,然后build + run

docker build -t rpm_libmysqlclient .
 
docker run --rm \
  -v /etc/localtime:/etc/localtime \
  -v ${PWD}:/tmp/libmysqlclient/ \
  rpm_libmysqlclient

最后会得到rpmbuild/RPMS/x86_64/libmysqlclient-18.1.0-1.x86_64.rpm包

替换掉Percona-Server-shared-56-5.6.51-rel91.0.1.el7.x86_64.rpm,再安装就没问题了。

作者:不吸烟的青蛙 原文地址:https://www.cnblogs.com/abo6364/p/16915045.html

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