openGauss安装前主机初始化 _初始

采得百花成蜜后，为谁辛苦为谁甜。这篇文章主要讲述openGauss安装前主机初始化相关的知识，希望能为你提供帮助。

虚拟机安装

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准备文件系统

LVM

pvcreate /dev/sdb
vgcreate datavg /dev/sdb
lvcreate -n datalv -L 200000M datavg
mkfs.xfs /dev/datavg/datalv
cat > > /etc/fstab < < EOF
/dev/datavg/datalv /opengauss xfs defaults,noatime,nodiratime,nobarrier 0 0
EOF
cat /etc/fstab
10.
mkdir /opengauss
mount /opengauss
mkdir -p /opengauss/opengaussdb,archive,scripts,backup,soft
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创建用户

groupadd opengauss
useradd -g opengauss -d /home/opengauss -m -s /bin/bash opengauss
echo "opengauss" |passwd --stdin opengauss
chown -R opengauss:opengauss /opengauss
su - opengauss
vi ~/.bash_profile
su - opengauss
vi ~/.bash_profile
export LANG=en_US.UTF8
export PS1="[??whoami???@??hostname??:"$PWD]$
export GAUSSHOME=/opengauss/opengaussdb/app
export LD_LIBRARY_PATH=/opengauss/opengaussdb/app/lib
export PATH=/opengauss/opengaussdb/app/bin:$PATH:$HOME/.local/bin:$HOME/bin
exit
source ~/.bash_profile
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修改主机参数

#修改启动级别
systemctl set-default multi-user.target
#修改/etc/security/limits.conf
cat > > /etc/security/limits.conf< < EOF

softnproc65535
hardnproc65535
softnofile65535
hardnofile65535
softstack65535
hardstack65535
hard memlock unlimited
soft memlock unlimited

EOF
cat/etc/security/limits.conf
#修改 /etc/sysctl.conf
echo "vm.swappiness=1" > > /etc/sysctl.conf
echo "fs.aio-max-nr = 1048576" > > /etc/sysctl.conf
echo "fs.file-max = 6815744" > > /etc/sysctl.conf
echo "net.ipv4.tcp_retries1=5" > > /etc/sysctl.conf
echo "net.ipv4.tcp_syn_retries=5" > > /etc/sysctl.conf
echo "net.ipv4.tcp_synack_retries=5" > > /etc/sysctl.conf
echo "net.ipv4.tcp_retries2=12" > > /etc/sysctl.conf
echo "net.ipv4.ip_local_port_range=26000 65535" > > /etc/sysctl.conf
echo "vm.min_free_kbytes=512000" > > /etc/sysctl.conf
echo "net.ipv4.tcp_fin_timeout=60" > > /etc/sysctl.conf
echo "net.ipv4.tcp_sack=1" > > /etc/sysctl.conf
echo "net.ipv4.tcp_timestamps=1" > > /etc/sysctl.conf
echo "vm.extfrag_threshold=500" > > /etc/sysctl.conf
echo "vm.overcommit_ratio=90" > > /etc/sysctl.conf
echo "kernel.sem = 250 32000 100 999" > > /etc/sysctl.conf
sysctl -p
#修改/etc/security/limits.d/20-nproc.conf
sed -i s/4096/65535/g /etc/security/limits.d/20-nproc.conf
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#设置时区
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
hwclock
#禁用selinux
sed -i s/SELINUX=enforcing/SELINUX=disabled/ /etc/selinux/config
setenforce 0
#关闭防火墙
systemctl disable firewalld.service
systemctl stop firewalld.service
#关闭透明大页
cp /etc/default/grub /etc/default/grub_bak
line_num=??cat -n /etc/default/grub | grep GRUB_CMDLINE_LINUX |awk print $1|head -n 1??sed -i --follow-symlinks s/transparent_hugepage=never//g /etc/default/grub
sed -i --follow-symlinks ""$line_num" s/\\"$/ transparent_hugepage=never\\"/g" /etc/default/grub
#生效grub配置
grub2-mkconfig -o /boot/grub2/grub.cfg
#禁用RemoveIPC
sed -i /^RemoveIPC/d /etc/systemd/logind.conf
sed -i /^RemoveIPC/d /usr/lib/systemd/system/systemd-logind.service
echo "RemoveIPC=no"> > /etc/systemd/logind.conf
echo "RemoveIPC=no"> > /usr/lib/systemd/system/systemd-logind.service
systemctl daemon-reload
systemctl restart systemd-logind
loginctl show-session | grep RemoveIPC
systemctl show systemd-logind | grep RemoveIPC
#配置yum源并安装依赖
mount /dev/cdrom /mnt
cd /etc/yum.repos.d
mkdir bk
mv *.repo bk/
echo "[EL7-1]" > /etc/yum.repos.d/itpux.repo
echo "name =Linux-7" > > /etc/yum.repos.d/itpux.repo
echo "baseurl=file:///mnt" > > /etc/yum.repos.d/itpux.repo
echo "gpgcheck=0" > > /etc/yum.repos.d/itpux.repo
echo "enabled=1" > > /etc/yum.repos.d/itpux.repo
yum install -y libaio-devel libnsl flex bison ncurses-devel glibc-devel patch readline-devel
yum install -y net-tools tar bzip2 python3 cmake make gcc zlib gcc-c++ perlzlib-devel tcl openssl openldap pam
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克隆三个虚拟机备用

opengauss01、opengauss02、opengauss03
192.168.75.61、192.168.75.62、192.168.75.63

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分别修改3台主机的IP地址和MAC地址

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vim /etc/sysconfig/network-scripts/ifcfg-ens33

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#修改hostname
hostnamectl --static set-hostname opengauss01
【openGauss安装前主机初始化】#修改/etc/hosts
echo "127.0.0.1localhost localhost.localdomain localhost4 localhost4.localdomain4"> /etc/hosts
echo "::1localhost localhost.localdomain localhost6 localhost6.localdomain6"> > /etc/hosts
echo "192.168.75.61 opengauss01"> > /etc/hosts
echo "192.168.75.62 opengauss02"> > /etc/hosts
echo "192.168.75.63 opengauss03"> > /etc/hosts
cat/etc/hosts
其他主机修改方法相同
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