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readme: use only docker containers to demo replication

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Sameer Naik
2015-07-11 19:55:33 +05:30
parent 5105cd9b70
commit a9e44ea16d
1 changed files with 12 additions and 48 deletions
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README.md
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@@ -150,59 +150,23 @@ You may use the `PSQL_MODE` variable along with `REPLICATION_HOST`, `REPLICATION
Your master database must support replication or super-user access for the credentials you specify. The `PSQL_MODE` variable should be set to `master`, for replication on your master node and `slave` or `snapshot` respectively for streaming replication or a point-in-time snapshot of a running instance.
Create a new master instance:
Create a master instance
```bash
docker run --name postgresql-master 5432:5432 -d \
-e 'PSQL_TRUST_LOCALNET=true' \
-e 'PSQL_MODE=master' \
-e 'DB_NAME=dbname' \
-e 'DB_USER=dbuser' -e 'DB_PASS=dbpass' \
-e 'REPLICATION_USER=replicator' -e 'REPLICATION_PASS=replicatorpass' \
sameersbn/postgresql:9.4
```
Create a slave instance with streaming replication:
```bash
docker run --name postgresql-slave -p 5433:5432 -d \
-e 'PSQL_TRUST_LOCALNET=true' \
-e 'PSQL_MODE=slave' \
-e 'REPLICATION_HOST=localhost' -e 'REPLICATION_PORT=5432' \
docker run --name='psql-master' -it --rm \
-e 'PSQL_MODE=master' -e 'PSQL_TRUST_LOCALNET=true' \
-e 'REPLICATION_USER=replicator' -e 'REPLICATION_PASS=replicatorpass' \
sameersbn/postgresql:9.4
```
Create a snapshot downloaded from a master instance:
```bash
docker run --name postgresql-slave -p 5433:5432 -d \
-e 'PSQL_TRUST_LOCALNET=true' \
-e 'PSQL_MODE=snapshot' \
-e 'REPLICATION_HOST=localhost' -e 'REPLICATION_PORT=5432' \
-e 'REPLICATION_USER=replicator' -e 'REPLICATION_PASS=replicatorpass' \
sameersbn/postgresql:9.4
```
You may use docker links and interactive shells when testing this module:
```bash
mkdir -p /tmp/postgresql-master
mkdir -p /tmp/postgresql-slave
# master
docker run --name='postgresql-master' -it --rm \
--volume=/tmp/postgresql-master:/var/lib/postgresql \
-e 'PSQL_TRUST_LOCALNET=true' \
-e 'PSQL_MODE=master' \
-e 'REPLICATION_USER=replicator' -e 'REPLICATION_PASS=replicatorpass' \
sameersbn/postgresql:latest
```
# slave
docker run --link postgresql-master:psql --name='postgresql-slave' -it --rm \
--volume=/tmp/postgresql-slave:/var/lib/postgresql \
-e 'PSQL_TRUST_LOCALNET=true' \
-e 'PSQL_MODE=slave' \
-e 'REPLICATION_HOST=psql' -e 'REPLICATION_USER=replicator' -e 'REPLICATION_PASS=replicatorpass' \
Create a streaming replication instance
```bash
docker run --name='psql-slave' -it --rm \
--link psql-master:psql-master \
-e 'PSQL_MODE=slave' -e 'PSQL_TRUST_LOCALNET=true' \
-e 'REPLICATION_HOST=psql-master' -e 'REPLICATION_PORT=5432' \
-e 'REPLICATION_USER=replicator' -e 'REPLICATION_PASS=replicatorpass' \
sameersbn/postgresql:latest
```