Installing Oracle 12c on CentOS 7

I wanted to capture the changes which need to be done to a fresh centos7 server install to support Oracle 12C. The server was installed with Basic Server using a 4GB swap device but before we can start the Oracle install, we need to prepare the system.

  1. Create credentials

    # for f in oinstall dba oper; do groupadd $f; done
    # useradd -g oinstall -G dba,oper oracle
     
  2. Install additional packages:

    # yum install binutils compat-libcap1 compat-libstdc++ gcc gcc-c++ glibc glibc-devel ksh libaio libaio-devel libgcc libstdc++ libstdc++-devel make sysstat net-tools telnet
     
  3. Disable the firewall

    # iptables --flush
    # systemctl mask firewalld
    # systemctl stop firewalld
     
  4. Tune open file descriptor limit
    using your favorite editor, edit /etc/security/limits.conf and add the following:

    oracle soft nofile 4096
    oracle hard nofile 65536
    oracle hard nproc 16384
     
  5. Tune shared memory
    check current shared memory:

    # df -ht tmpfs | grep /dev/shm
    tmpfs 1.9G 912M 984M 49% /dev/shm

    using  your favorite editor, edit /etc/fstab and add or update the following:

    none      /dev/shm        tmpfs   defaults,size=8G        0 0

    remount /dev/shm to reflect new value and check again:

    # mount -o remount /dev/shm
    # df -ht tmpfs | grep /dev/shm
    tmpfs 8.0G 456M 7.6G 6% /dev/shm
  6. Create /etc/oraInst.loc

    # cat > /etc/oraInst.loc
    inventory_loc=/u01/app/oracle/oraInventory
    inst_group=oinstall
    ^D

    Correct permissions

    # chown oracle:oinstall /etc/oraInst.loc
    # chmod 644 /etc/oraInst.loc
     
  7. Modify or create a response file.
    Make a copy of the response file found in the Oracle install directory, database/response/db_install.rsp and edit to match your environment. Here is the list of variables which were changed in my install:

    oracle.install.option=INSTALL_DB_SWONLY
    ORACLE_HOSTNAME=centos
    UNIX_GROUP_NAME=oinstall
    INVENTORY_LOCATION=/u01/12.1.0.2/database/stage/products.xml
    SELECTED_LANGUAGES=en
    ORACLE_HOME=/u01/app/oracle/product/12.1.0.2/db_1
    ORACLE_BASE=/u01/app/oracle
    oracle.install.db.InstallEdition=EE
    oracle.install.db.DBA_GROUP=dba
    oracle.install.db.OPER_GROUP=oper
    oracle.install.db.BACKUPDBA_GROUP=dba
    oracle.install.db.DGDBA_GROUP=dba
    oracle.install.db.KMDBA_GROUP=dba
    SECURITY_UPDATES_VIA_MYORACLESUPPORT=false
    DECLINE_SECURITY_UPDATES=true
     
  8. Install Oracle
    Log in as the oracle user and run the installer:

    % ./runInstaller -force -silent -responseFile ~/db_install.rsp
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