四、DB(Database)安装
4.1 解压DB的安装包
oracle用户登录，在$ORACLE_HOME下解压db包（18c的db也是直接解压到$ORACLE_HOME下，免安装）：
Starting with Oracle Database 18c, installation and configuration of Oracle Database software is simplified with image-based installation.
[oracle@db40 ~]$ mkdir -p /u01/app/oracle/product/18.3.0/db_1
[oracle@db40 ~]$ cd $ORACLE_HOME/
[oracle@db40 db_1]$ pwd
/u01/app/oracle/product/18.3.0/db_1
[oracle@db40 db_1]$ unzip /tmp/LINUX.X64_180000_db_home.zip 4.2 DB软件配置
打开Xmanager软件，Oracle用户登录，配置数据库软件。
[oracle@db40 db_1]$ pwd
/u01/app/oracle/product/18.3.0/db_1
[oracle@db40 db_1]$ export DISPLAY=192.168.1.31:0.0
[oracle@db40 db_1]$ ./runInstaller 下面截取DB软件配置的过程如下：
4.3 ASMCA创建磁盘组
打开Xmanager软件，grid用户登录，asmca创建ASM磁盘组
[grid@db40 ~]$ export DISPLAY=192.168.1.31:0.0
[grid@db40 ~]$ asmca这个asmca调用图形等了几分钟才出来，首先映入眼帘的是鲜艳的18c配色图：
4.4 DBCA建库
打开Xmanager软件，oracle用户登录，dbca图形创建数据库，数据库字符集我这里选择ZHS16GBK。
下面是DBCA建库的过程截图：
4.5 验证crsctl的状态
grid用户登录，crsctl stat res -t 查看集群资源的状态，发现各节点的DB资源已经正常Open。
[grid@db40 ~]$ crsctl stat res -t
--------------------------------------------------------------------------------
Name Target State Server State details
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.ASMNET1LSNR_ASM.lsnr
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.DATA.dg
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.FRA.dg
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.LISTENER.lsnr
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.MGMT.GHCHKPT.advm
OFFLINE OFFLINE db40 STABLE
OFFLINE OFFLINE db42 STABLE
ora.MGMT.dg
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.OCRVT.dg
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.chad
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.helper
OFFLINE OFFLINE db40 IDLE,STABLE
OFFLINE OFFLINE db42 STABLE
ora.mgmt.ghchkpt.acfs
OFFLINE OFFLINE db40 STABLE
OFFLINE OFFLINE db42 STABLE
ora.net1.network
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.ons
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
ora.proxy_advm
ONLINE ONLINE db40 STABLE
ONLINE ONLINE db42 STABLE
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.LISTENER_SCAN1.lsnr
1 ONLINE ONLINE db42 STABLE
ora.MGMTLSNR
1 ONLINE ONLINE db42 169.254.7.154 10.0.0
.42,STABLE
ora.asm
1 ONLINE ONLINE db40 Started,STABLE
2 ONLINE ONLINE db42 Started,STABLE
3 OFFLINE OFFLINE STABLE
ora.cdb.db
1 ONLINE ONLINE db40 Open,HOME=/u01/app/o
racle/product/18.3.0
/db_1,STABLE
2 ONLINE ONLINE db42 Open,HOME=/u01/app/o
racle/product/18.3.0
/db_1,STABLE
ora.cvu
1 ONLINE ONLINE db42 STABLE
ora.db40.vip
1 ONLINE ONLINE db40 STABLE
ora.db42.vip
1 ONLINE ONLINE db42 STABLE
ora.mgmtdb
1 ONLINE ONLINE db42 Open,STABLE
ora.qosmserver
1 ONLINE ONLINE db42 STABLE
ora.rhpserver
1 OFFLINE OFFLINE STABLE
ora.scan1.vip
1 ONLINE ONLINE db42 STABLE
--------------------------------------------------------------------------------oracle用户登录，sqlplus / as sysdba
[oracle@db40 ~]$ sqlplus / as sysdba
SQL*Plus: Release 18.0.0.0.0 - Production on Sun Aug 5 16:04:42 2018
Version 18.3.0.0.0
Copyright (c) 1982, 2018, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 - Production
Version 18.3.0.0.0
SQL> select inst_id, name, open_mode from gv$database;
INST_ID NAME OPEN_MODE
---------- --------- --------------------
1 CDB READ WRITE
2 CDB READ WRITE
SQL> show con_id
CON_ID
------------------------------
1
SQL> show con_name
CON_NAME
------------------------------
CDB$ROOT
SQL> show pdbs
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB1 READ WRITE NO
4 PDB2 READ WRITE NO
5 PDB3 READ WRITE NO
6 PDB4 READ WRITE NO
SQL> alter session set container = pdb4;
Session altered.
SQL> show pdbs
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
6 PDB4 READ WRITE NO
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATA/CDB/72AB854658DD18D8E0532801A8C0CA21/DATAFILE/system.292.983371593
+DATA/CDB/72AB854658DD18D8E0532801A8C0CA21/DATAFILE/sysaux.293.983371593
+DATA/CDB/72AB854658DD18D8E0532801A8C0CA21/DATAFILE/undotbs1.291.983371593
+DATA/CDB/72AB854658DD18D8E0532801A8C0CA21/DATAFILE/undo_2.295.983372151
+DATA/CDB/72AB854658DD18D8E0532801A8C0CA21/DATAFILE/users.296.983372191
SQL>可以看到所有的资源均正常，至此，整个在OEL 7.5 上安装 Oracle 18.3 GI & RAC 的工作已经全部结束。