I have an existing database instance in RDS. I'd like to take a snapshot of this database instance and restore it to a new Aurora cluster.
How can I do this? I would think this would be a common thing, but can't seem to figure out the steps to make this happen.
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I am trying to set up a process in which a postgres staging database is populated with production data.
I have some working implementation with pg_dump and pg_restore but I was wondering if something in RDS itself is possible.
We have nightly snapshots on our production database. My goal would be RDS takes the latest database snapshot, migrates it to an existing database and does this on some scheduled cadence (1/week or something like that).
Is this possible to configure in the console? If not are there some some combination of lambda/cloud formation that can do this?
My goal would be RDS takes the latest database snapshot, migrates it to an existing database
RDS never loads a snapshot into an existing database. It always creates an entirely new database server/cluster from a snapshot.
Is this possible to configure in the console? If not are there some some combination of lambda/cloud formation that can do this?
You would have to write some code that creates a new staging database server from the production snapshot, and deletes your current server.
If you are using CloudFormation, then it could manage this for you if you specify the DBSnapshotIdentifier parameter. You would have to modify that parameter each week, and then update your CloudFormation stack.
We are migrating data from a couple of Aurora instances to our own single Aurora instance. All of them run Postgres. I realized that some of our tasks are configured to use PostgreSQL while others are configured to use Amazon Aurora PostgreSQL. Now we have not had any visible problems using either of them (with source being an Aurora instance). But I am curious on whether this can create any future problems. Does anyone have an answer on what the differences are, since I couldn't find any documentation on this.
I have created a AWS RDS Postgresql db instance in one VPC and I need to "move" it to another VPC.
I created a snapshot of the original db instance.
Re-created it in a new VPC (using terraform).
How can I retrieve one particular database from my initial db instance snapshot into the new DB Instance?
When you restore snapshot all databases are restored.
If you want to copy particular database, AWS service Database Migration Service can be used if postgres version is higher than 9.4.
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.PostgreSQL.html
If postgres version is lower, then only manual export/import of database can be used. Another instance where export files will be stored is needed.
I want to understand AWS Relational Database Service (RDS) and discover benefits from using it.
Why RDS is better than manually installed PostgreSQL database in EC2 instance?
Is it possible to connent existing database in EC2 instance with Amazon RDS?
How it really works?
How I should automation RDS?
When I want create new database in existing EC2 instance I can use Ansible in simply way. How I should connect my application with database which uses RDS ?
Thanks in advance!
I want to understand AWS Relational Database Service (RDS) and discover benefits from using it.
As already commented, read the docs and whitepapers.
Why RDS is better than manually installed PostgreSQL database in EC2 instance?
you can be sure it is well setup, you will get point in time recovery, backups and high availability. As well you can set it up yourself, however using RDS you have it all already configured.
Ifs it possible to connent existing database in EC2 instance with Amazon RDS? How it really works?
you don't have access to any underlying configuration, so nope, you cannot really connect ec2 database w/ rds (e. g. wal for wal streaming).
you still can use database migration tools to migrate all databases and updates to or from rds
How I should automation RDS? When I want create new database in existing EC2 instance I can use Ansible in simply way.
you can use a cloudformation template or cli commands
How I should connect my application with database which uses RDS ?
when you create a rds instance, you will define an admin user and receive a connection url
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.Scenarios.html#USER_VPC.Scenario1
I want to migrate our postgres db from heroku to our own postgres on AWS.
I have tried using pg_dump and pg_restore to do the migration and it works; but it takes a really long time to do this. Our database size is around 20GB.
What's the best way to do the migration with minimal downtime?
If you mean AWS RDS PostgreSQL:
pg_dump and pg_restore
I know you don't like it, but you don't really have other options. With a lot of hoop jumping you might be able to do it with Londiste or Slony-I on a nearby EC2 instance, but it'd be ... interesting. That's not the most friendly way to do an upgrade, to say the least.
What you should be able to do is ship WAL into RDS PostgreSQL, and/or stream replication logs. However Amazon don't support this.
Hopefully Amazon will adopt some part of 9.4's logical replication and logical changeset extraction features, or better yet the BDR project - but I wouldn't hold my breath.
If you mean AWS EC2
If you're running your own EC2 instance with Pg, use replication then promote the standby into the new master.