华为国产openGauss数据库安装详细教程

    安装openGauss步骤
    一、检查硬件配置
   

    #cat /proc/cpuinfo |grep processor
    #cat /etc/redhat-release
    #free -m  

    ## 如果内存小于32GB，会因为内存不足导致数据库无法启动，此时需要修改shared_buffers和max_connections调整openGauss所需的内存
    
    1、安装jdk8、python3，系统默认是python2,需要升级到3.6 先下载 python3.6.8

    #yum install -y lksctp*
    #yum install -y java-1.8.0-openjdk* psmisc bzip2 python3 python3-devel
    #yum install -y libaio-devel flex bison ncurses-devel glibc-devel patch redhat-lsb-core

    #rpm -qa java-1.8.0-openjdk psmisc bzip2 libaio-devel flex bison ncurses-devel glibc-de

    #checksctp
    #yum install gcc zlib* openssl* -y
    #tar -zxvf Python-3.6.8.tgz   //解压
    #cd Python-3.6.8
    #./configure --prefix=/usr/python3.6.11 --enable-optimizations --enable-shared
    #make
    #make install
    #ln -s /usr/python3.6.11/bin/python3.6 /usr/bin/python3
    #ln -s /usr/python3.6.11/bin/pip3 /usr/bin/pip3
    #ln -s /usr/python3.6.11/lib/libpython3.6m.so.1.0 /usr/lib64/
    #export LD_LIBRARY_PATH=/usr/python3.6.11/lib:$LD_LIBRARY_PATH
    #python3  -V  ///查看python版本是否升级成功

    2、设置主机IP 主机名  （主机名在后续配置文件使用到）

    

    #vi /etc/hosts
    --------------------
    192.168.0.11  db1.opengauss.com   #Gauss OM IP Hosts Mapping 
    --------------------

   3、关闭防火墙

    #systemctl status firewalld
    #systemctl stop firewalld.service

    4、关闭SELinux

    #vi /etc/selinux/config
    ---------------------------
    SELINUX=disabled
    ---------------------------

    5、修改字符集参数

    #vi ~/.bash_profile
    ---------------------------
    export LANG=en_US.UTF-8
    ---------------------------
    #source ~/.bash_profile

    6、关闭SWAP
     

    #vi /etc/fstab   ## 注释掉swap分区挂载
    swapoff -a      ## 关闭swap

   
    7、配置内核参数
   

 # vi /etc/sysctl.conf
    ---------------------------
    net.ipv4.tcp_max_tw_buckets = 10000
    net.ipv4.tcp_tw_reuse = 1
    net.ipv4.tcp_tw_recycle = 1
    net.ipv4.tcp_keepalive_time = 30
    net.ipv4.tcp_keepalive_probes = 9
    net.ipv4.tcp_keepalive_intvl = 30
    net.ipv4.tcp_retries1 = 5
    net.ipv4.tcp_syn_retries = 5
    net.ipv4.tcp_synack_retries = 5
    net.sctp.path_max_retrans = 10
    net.sctp.max_init_retransmits = 10
    net.sctp.association_max_retrans = 10
    net.sctp.hb_interval = 30000
    net.ipv4.tcp_retries2 = 12
    vm.overcommit_memory = 0
    net.sctp.sndbuf_policy = 0
    net.sctp.rcvbuf_policy = 0
    net.sctp.sctp_mem = 94500000 915000000 927000000
    net.sctp.sctp_rmem = 8192 250000 16777216
    net.sctp.sctp_wmem = 8192 250000 16777216
    net.ipv4.tcp_rmem = 8192 250000 16777216
    net.ipv4.tcp_wmem = 8192 250000 16777216
    net.core.wmem_max = 21299200
    net.core.rmem_max = 21299200
    net.core.wmem_default = 21299200
    net.core.rmem_default = 21299200
    net.ipv4.ip_local_port_range = 26000 65535
    kernel.sem = 250 6400000 1000 25600
    vm.min_free_kbytes = 102400    ## 内存*5%
    net.core.somaxconn = 65535
    net.ipv4.tcp_syncookies = 1
    net.sctp.addip_enable = 0
    net.core.   netdev_max_backlog = 65535
    net.ipv4.tcp_max_syn_backlog = 65535
    net.ipv4.tcp_fin_timeout = 60
    kernel.shmall = 1152921504606846720
    kernel.shmmax = 18446744073709551615
    net.ipv4.tcp_sack = 1
    net.ipv4.tcp_timestamps = 1
    vm.extfrag_threshold = 500
    vm.overcommit_ratio = 90
    ----------------------------------------

    8、redhat 6.4&6.5需要打开sctp的checksums，否则可能引起创建表或数据库失败

#echo 0 >  /sys/module/sctp/parameters/no_checksums

    二、预安装openGauss软件

    1、配置clusterconfig.xml文件

 

    2、初始化环境
    openGauss-1.0.0-CentOS-64bit.tar.gz 安装包地址

    #mkdir /gauss
    #chgrp dbgrp -R /gauss 
    #chmod 775 -R /gauss
    #mkdir -p /soft/openGauss
    #chmod 775 -R /soft
    #mv clusterconfig.xml   /soft/openGauss
    #mv openGauss-1.0.0-CentOS-64bit.tar.gz  /soft/openGauss
    #cd /soft/openGauss
    #tar -zxvf openGauss-1.0.0-CentOS-64bit.tar.gz

 

    #export LD_LIBRARY_PATH=/soft/openGauss/script/gspylib/clib:/usr/python3.6.8/lib:
    $LD_LIBRARY_PATH
    #cd /soft/openGauss/script
    #./gs_preinstall -U omm -G dbgrp -X /soft/openGauss/clusterconfig.xml   //预安装

    
    四、部署安装openGauss软件
    1、执行安装脚本

    #chmod -R 775 /soft/
    #chown omm:dbgrp /soft -R
    #su - omm
    #cd /soft/openGauss/script
    #./gs_install -X /soft/openGauss/clusterconfig.xml  ## 密码复杂度要求：大写+小写+数字+特殊字符(任选3类，至少8位)

五、数据库操作
    1. 启停数据库

 

    #gs_ctl start -D /opt/huawei/install/data/db1/
    #gs_ctl stop -D /opt/huawei/install/data/db1/

    2. 切换omm系统用户，登录数据库

       1）#gs_guc set -N all -I all -h "host all jack 192.168.137.1/32 sha256"
       2）#gsql -d postgres -p 26000 

       3）修改oom用户密码 :

ALTER ROLE omm IDENTIFIED BY '@Dean1912' REPLACE '@Dean19910707';

    3. 创建用户并赋予用户管理权限
      1)创建用户jack 并设置密码为jack@123
       

create user jack identified by 'jack@123';

      2）默认用户没有创建数据库表权限需要修改其权限   
       

ALTER ROLE gaussadmin SYSADMIN; 

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    4. 先安装gsql远程登录工具（下载地址）

    #gsql -d postgres -h 192.168.15.155 -U jack -p 26000 -W jack@123
    #gsql -d postgres -h 192.168.15.155 -U gaussadmin -p 26000 -W Gauss@123

    5. 创建数据库gaussdb

CREATE DATABASE gaussadb ENCODING 'UTF-8' template = template0;

    6. 创建表test

create table t_sys(id int primary key,name varchar(40),pass varchar(20));