1. Introduction

These are all the instructions needed to setup two oracle XE 11g instances setup as Master Standby replication configured on two Docker containers.

2. Docker Quick Refresher

2.1 Start containers

docker-compose up -d
docker-compose ps

2.2 Connect to master

ssh root@localhost -p 49822

2.3 Connect to slave (from master)

ssh root@oraclexe_db_standby_1

3. Prerequisites

Exchange SSH keys between master and standby
Install rsync (apt-get install rsync) on both servers
Amend STANDBY variable inside step_3_master_xferfiles.sh and ship_logs.sh to reflect name of your standby container

4. Deployment

4.1 Semi-Automatic Process

4.1.1 Docker Host

scp -P49522 step_1_master_prep.sh step_3_master_xferfiles.sh ship_logs.sh switch_log.sql root@localhost:/tmp
scp -P49622 step_2_standby_prep.sh step_4_standby_startup_standby.sh apply_logs.sh root@localhost:/tmp

4.1.2 Configure Master Node

ssh root@localhost -p 49522
cd /tmp
./step_1_master_prep.sh

4.1.3 Configure Standby Node

ssh root@localhost -p 49622
cd /tmp
./step_2_standby_prep.sh

4.1.4 Copy files to Master

ssh root@localhost -p 49522
cd /tmp
./step_3_master_xferfiles.sh

4.1.5 Copy files to Standby

ssh root@localhost -p 49622
cd /tmp
./step_4_standby_startup_standby.sh

4.1.6 Ship Logs from Master to Standby

ssh root@localhost -p 49522
su - oracle
cd /tmp
./ship_logs.sh

4.1.7 Apply Logs on Standby

ssh root@localhost -p 49622
su - oracle
cd /tmp
./apply_logs.sh

4.2 MANUAL INSTRUCTIONS:

4.2.1 Enable archivelog mode in master

sqlplus sys/oracle as sysdba
shutdown immediate;
startup mount;
alter database archivelog;
alter database open;

4.2.2 Create archivelog location (master)

mkdir /archivelog
chown oracle:dba /archivelog/
sqlplus sys/oracle as sysdba
alter system set db_recovery_file_dest='/archivelog' scope=both;

4.2.3 Take cold backup of Master database

shutdown immediate;
create pfile=‘/archivelog/initXE.ora’ from spfile;
pushd /u01/app/oracle/oradata/XE/ ; tar zcvf masterdata.tgz *.dbf; popd

4.2.4 Create standby control file from Master database

alter database create standby controlfile as '/archivelog/stbycf.ctl';

4.2.5 Prep standby server

mkdir /archivelog
chown oracle:dba /archivelog/
shutdown immediate;
pushd /u01/app/oracle/
mv oradata/ oradata_original
mkdir oradata; mkdir oradata/XE; chown -R oracle:dba oradata
popd

4.2.6 Transfer files to standby server

scp /archivelog/masterdata.tgz root@oraclexe_db_standby_1:/u01/app/oracle/oradata/XE/
scp stbycf.ctl root@oraclexe_db_standby_1:/u01/app/oracle/oradata/XE/
scp initXE.ora root@oraclexe_db_standby_1:/archivelog/

4.2.7 Last tidbits on standby server

chown -R oracle:dba /u01/app/oracle/oradata/XE/
chown -R oracle:dba /archivelog/

Amend pfile (/archivelog/initXE.ora/) to reflect standby controlfile (/u01/app/oracle/oradata/XE/stbycf.ctl)

4.2.8 Startup standby database from pfile

startup nomount pfile='/archivelog/initXE.ora';
alter database mount standby database;

And we now have a standby database too!

4.2.9 Ship logs (master)

./ship_logs.sh

4.2.10 Apply logs (standby)

./apply_logs.sh

Check out the demo movie to see this working in action.

jamesattard/oracle-xe-docker