CentOS6升级CentOS7

Posted 2021-09-11 John08

1. 配置仓库源

centos6.repo：
[base]
name=base
baseurl=http://192.168.200.1/reposyum/CentOS/6.8/os/x86_64/
enabled=1
gpgcheck=0

[extras]
name=extras
baseurl=http://192.168.200.1/reposyum/CentOS/6.8/extras/x86_64/
enabled=1
gpgcheck=0

[updates]
name=updates
baseurl=http://192.168.200.1/reposyum/CentOS/6.8/updates/x86_64/
enabled=1
gpgcheck=0

[plus]
name=plus
baseurl=http://192.168.200.1/reposyum/CentOS/6.8/centosplus/x86_64/
enabaled=1
gpgcheck=0

epel6.repo：
[epel-x86_64]
name=epel-x86_64
baseurl=http://192.168.200.1/reposyum/epel/6/x86_64/
enabled=1
gpgcheck=0

upgrade.repo:
[upgrade]
name=upgrade
baseurl=http://192.168.200.1/reposyum/CentOS6upg/
enable=1
gpgcheck=0

2. 将镜像iso挂载到本地

mkdir /centos7

vi /etc/fstab

#add
/root/CentOS-7-x86_64-DVD-1511.iso /centos7     iso9660 defaults,loop   0 0

3. 安装软件工具

yum -y install preupgrade-assistant-contents redhat-upgrade-tool preupgrade-assistant

4. 升级评估

preupg

评估过程会出现找不到result.html的报错，可忽略

5. 强制升级

redhat-upgrade-tool-cli --device=/centos7 --force

reboot

6. 升级过程
7. 验证

uname -r

3.10.0-327.el7.x86_64

cat /etc/redhat-release

CentOS Linux release 7.2.1511 (Core)

8. 将CentOS6的so.0.0.1文件复制到/lib64目录下

建立软链接：

cd /lib64

ln -s libpcre.so.0.0.1 libpcre.so.0

9. 更改源为CentOS7的源

删除所有源，去掉fstab挂载的iso文件，删除/centos7目录

新增yum源：

centos7.repo：
[base]
name=base
baseurl=http://192.168.200.1/reposyum/CentOS/ 7.2.1511/os/x86_64/
enabled=1
gpgcheck=0

[extras]
name=extras
baseurl=http://192.168.200.1/reposyum/CentOS/ 7.2.1511/extras/x86_64/
enabled=1
gpgcheck=0

[updates]
name=updates
baseurl=http://192.168.200.1/reposyum/CentOS/ 7.2.1511/updates/x86_64/
enabled=1
gpgcheck=0

[plus]
name=plus
baseurl=http://192.168.200.1/reposyum/CentOS/ 7.2.1511/centosplus/x86_64/
enabaled=1
gpgcheck=0

epel7.repo：
[epel-x86_64]
name=epel-x86_64
baseurl=http://192.168.200.1/reposyum/epel/7/x86_64/
enabled=1
gpgcheck=0

10. 更新系统

yum clean all

yum makecache

yum upgrade