环境信息
172.25.22.4
操作系统版本：CentOS release 6.8 (Final)
内核版本：2.6.32-642.el6.x86_64
安装软件：MySQL5.7.25，Oracle12.2.0.1.0
[root@kvm22-4 ~]# cat /etc/redhat-release
CentOS release 6.8 (Final)
[root@kvm22-4 ~]# uname -r
2.6.32-642.el6.x86_64
[root@kvm22-4 ~]# mysql --version
mysql Ver 14.14 Distrib 5.7.25, for Linux (x86_64) using EditLine wrapper
[root@kvm22-4 ~]# su - oracle
[oracle@kvm22-4 ~]$ sqlplus -v
SQL*Plus: Release 12.2.0.1.0 Productioncentos6.8升至centos6.10
# 配置centos6.10yum源
# yum upgrade后重启
[root@kvm22-4 ~]# cat /etc/redhat-release
CentOS release 6.10 (Final)
[root@kvm22-4 ~]# uname -r
2.6.32-754.35.1.el6.x86_64下载安装升级软件工具
[root@kvm22-4 upgrade_tool]# ll
total 7916
-rw-r--r-- 1 root root 449596 May 10 17:40 preupgrade-assistant-1.0.2-33.0.3.el6.centos.x86_64.rpm
-rw-r--r-- 1 root root 604616 May 10 17:40 preupgrade-assistant-contents-0.5.13-1.0.5.el6.centos.noarch.rpm
-rw-r--r-- 1 root root 6955552 May 10 17:40 preupgrade-assistant-ui-1.0.2-33.0.3.el6.centos.x86_64.rpm
-rw-r--r-- 1 root root 87388 May 10 17:40 redhat-upgrade-tool-0.7.22-3.el6.centos.noarch.rpm
[root@kvm22-4 upgrade_tool]# yum localinstall \
preupgrade-assistant-1.0.2-33.0.3.el6.centos.x86_64.rpm \
preupgrade-assistant-contents-0.5.13-1.0.5.el6.centos.noarch.rpm \
preupgrade-assistant-ui-1.0.2-33.0.3.el6.centos.x86_64.rpm \
redhat-upgrade-tool-0.7.22-3.el6.centos.noarch.rpm在线升级至centos7.2
[root@kvm22-4 ~]# rpm --import http://vault.centos.org/centos/7.2.1511/os/x86_64/RPM-GPG-KEY-CentOS-7
[root@kvm22-4 ~]# centos-upgrade-tool-cli --network 7 --instrepo=http://vault.centos.org/centos/7.2.1511/os/x86_64/ --force
# 命令结束之后需重启完成升级重启升级过程中可能会有如下库文件缺失的报错，先不用管，等待机器开机
开机之后查看机器版本已经升为7.2.1511，内核版本为3.10.0-327.el7
由于缺失共享库文件导致无法启动ssh服务
修复库文件缺失问题
ln -s /usr/lib64/libsasl2.so.3.0.0 /usr/lib64/libsasl2.so.2
ln -s /usr/lib64/libpcre.so.1.2.0 /usr/lib64/libpcre.so.0
升级后数据库可以正常启动
升级操作系统为centos7最新版
# 操作系统大版本升级后系统中仍然保留一些旧的软件包，这些包会影响系统升级，将其卸载或更新为等效的el7
# 下面是系统中还存在的CentOS 6软件包
[root@kvm22-4 ~]# rpm -qa | grep el6
mesa-libEGL-11.0.7-4.el6.x86_64
libkadm5-1.10.3-65.el6.x86_64
vim-common-7.4.629-5.el6_10.2.x86_64
openldap-devel-2.4.40-16.el6.x86_64
nss-tools-3.44.0-7.el6_10.x86_64
libffi-3.0.5-3.2.el6.i686
gdbm-1.8.0-39.el6.i686
python-oauth-1.0.1-1.el6.centos.noarch
mesa-libGL-11.0.7-4.el6.x86_64
MAKEDEV-3.24-6.el6.x86_64
mysql-community-embedded-5.7.25-1.el6.x86_64
busybox-1.15.1-21.el6_6.x86_64
libXfixes-5.0.3-1.el6.x86_64
sinjdoc-0.5-9.1.el6.x86_64
nss-softokn-3.44.0-6.el6_10.x86_64
device-mapper-persistent-data-0.6.2-0.2.rc7.el6.x86_64
libX11-common-1.6.4-4.el6_10.noarch
mdadm-3.3.4-8.el6.x86_64
libX11-1.6.4-4.el6_10.x86_64
openscap-1.2.13-2.el6.x86_64
preupgrade-assistant-1.0.2-33.0.3.el6.centos.x86_64
dash-0.5.5.1-4.el6.x86_64
python-urllib3-1.10.2-3.el6.noarch
mysql-community-libs-compat-5.7.25-1.el6.x86_64
libgcj-4.4.7-23.el6.x86_64
xorg-x11-utils-7.5-14.el6.x86_64
ql2400-firmware-7.03.00-1.el6_5.noarch
zd1211-firmware-1.4-4.el6.noarch
ipw2200-firmware-3.1-4.el6.noarch
openldap-2.4.40-16.el6.x86_64
elfutils-libelf-0.164-2.el6.x86_64
systemtap-sdt-devel-2.9-9.el6.x86_64
redhat-upgrade-tool-0.7.22-3.el6.centos.noarch
python-argparse-1.2.1-2.1.el6.noarch
python-prettytable-0.7.2-11.el6.noarch
python-markdown-2.0.1-4.el6.noarch
pytalloc-2.1.5-1.el6_7.x86_64
python-requests-2.6.0-4.el6.noarch
mingetty-1.08-5.el6.x86_64
mysql-community-libs-5.7.25-1.el6.x86_64
mysql-community-client-5.7.25-1.el6.x86_64
cloog-ppl-0.15.7-1.2.el6.x86_64
libdrm-2.4.65-2.el6.x86_64
alsa-lib-1.1.0-4.el6.x86_64
libXrender-0.9.10-1.el6.x86_64
libXrandr-1.5.1-1.el6.x86_64
libldb-1.1.25-2.el6_7.x86_64
java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64
libgcj-devel-4.4.7-23.el6.x86_64
libXv-1.0.11-1.el6.x86_64
atmel-firmware-1.3-7.el6.noarch
nspr-4.21.0-1.el6_10.x86_64
libtdb-1.3.8-3.el6_8.2.x86_64
nss-sysinit-3.44.0-7.el6_10.x86_64
mesa-libgbm-11.0.7-4.el6.x86_64
kpartx-0.4.9-106.el6_10.1.x86_64
vim-enhanced-7.4.629-5.el6_10.2.x86_64
ca-certificates-2020.2.41-65.1.el6_10.noarch
xorg-x11-drv-ati-firmware-7.6.1-4.el6.noarch
elfutils-libs-0.164-2.el6.x86_64
audit-libs-python-2.4.5-6.el6.x86_64
preupgrade-assistant-contents-0.5.13-1.0.5.el6.centos.noarch
mesa-dri-filesystem-11.0.7-4.el6.x86_64
python-backports-ssl_match_hostname-3.4.0.2-5.el6.noarch
mesa-dri-drivers-11.0.7-4.el6.x86_64
python-cheetah-2.4.1-1.el6.x86_64
python-boto-2.34.0-6.el6.noarch
audit-2.4.5-6.el6.x86_64
mysql-community-server-5.7.25-1.el6.x86_64
mysql-community-test-5.7.25-1.el6.x86_64
bfa-firmware-3.2.23.0-2.el6.noarch
b43-openfwwf-5.2-10.el6.noarch
gcc-java-4.4.7-23.el6.x86_64
ql2500-firmware-7.03.00-1.el6_5.noarch
nss-util-3.44.0-1.el6_10.x86_64
ipw2100-firmware-1.3-11.el6.noarch
nss-softokn-freebl-3.44.0-6.el6_10.x86_64
libnih-1.0.1-8.el6.x86_64
libtevent-0.9.26-2.el6_7.x86_64
vim-minimal-7.4.629-5.el6_10.2.x86_64
expat-2.0.1-13.el6_8.i686
python-libs-2.6.6-68.el6_10.i686
ksh-20120801-38.el6_10.x86_64
audit-libs-2.4.5-6.el6.x86_64
preupgrade-assistant-ui-1.0.2-33.0.3.el6.centos.x86_64
mysql-community-embedded-devel-5.7.25-1.el6.x86_64
trousers-0.3.13-2.el6.x86_64
libXtst-1.2.3-1.el6.x86_64
grep-2.20-6.el6.x86_64
libtalloc-2.1.5-1.el6_7.x86_64
vim-filesystem-7.4.629-5.el6_10.2.x86_64
nss-softokn-freebl-3.44.0-6.el6_10.i686
tzdata-2020d-1.el6.noarch
mesa-dri1-drivers-7.11-8.el6.x86_64
json-c-0.11-13.el6.x86_64
python-jsonpatch-1.2-4.el6.noarch
libgssglue-0.1-11.el6.x86_64
mysql-community-common-5.7.25-1.el6.x86_64
mysql-community-devel-5.7.25-1.el6.x86_64
ppl-0.10.2-11.el6.x86_64
libxcb-1.12-4.el6.x86_64
libXi-1.7.8-1.el6.x86_64
pixman-0.32.8-1.el6.x86_64
ecj-4.5.2-3.el6.x86_64
nss-3.44.0-7.el6_10.x86_64# 修改yum 的配置文件/etc/yum/yum.conf剔除不升级的软件
exclude=mysql*
# 卸载centos6的软件包
rpm -qa | grep el6 | grep -v '^mysql' | xargs -I {} yum remove {} -y
# 升级系统软件包，然后重启
yum update -y重启后操作系统版本与内核版本已升级至最新
检查MySQL数据库正常
检查Oracle数据库正常
卸载旧内核
[root@kvm22-4 ~]# rpm -qa | grep kernel
kernel-3.10.0-1160.90.1.el7.x86_64
kernel-headers-3.10.0-1160.90.1.el7.x86_64
kernel-3.10.0-327.el7.x86_64
[root@kvm22-4 ~]# rpm -e kernel-3.10.0-327.el7.x86_64
[root@kvm22-4 ~]# rpm -e kernel-headers-3.10.0-1160.90.1.el7.x86_64
