https://github.com/oracle-quickstart/oci-migrate-ad
Scripts to migrate compute resources between Avvailability Domains
https://github.com/oracle-quickstart/oci-migrate-ad
Last synced: 4 months ago
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Scripts to migrate compute resources between Avvailability Domains
- Host: GitHub
- URL: https://github.com/oracle-quickstart/oci-migrate-ad
- Owner: oracle-quickstart
- License: upl-1.0
- Created: 2022-12-09T17:47:32.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2022-12-13T21:16:21.000Z (over 2 years ago)
- Last Synced: 2024-12-29T20:16:01.570Z (6 months ago)
- Language: HCL
- Size: 372 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Move instances and volumes between Availability Domains
## Overview
This repository contains terraform and shell which can create backups of existing
instances, boot volumes, and block volumes and re-deploy them in another availability domain. There are three scripts intended to be run within Cloud Shell in the OCI console. No local setup is needed.
**Note**: these scripts assume the following:
- Instances and volumes are in the same compartment.
- The subnet the instances are in is regional and a suitable target for new instances.
- Public IPs of instances are not retained, but private IPs and hostnames are.
- The instances and applications running on them have been stopped.
## Steps
- Open [Cloud Shell](https://cloud.oracle.com/?bdcstate=default&cloudshell=true) in your browser.
- Grab the content of this repo by running the below commands in the Cloud Shell prompt:
```
wget https://github.com/oracle-quickstart/oci-migrate-ad/archive/refs/heads/main.zip && \
unzip main.zip && \
cd oci-migrate-ad-main/
```
- Run `oci iam availability-domain list`. The output will have the tenancy specific
names of the ADs in your region.
- Edit `env.sh` setting the following variables:
- `TF_VAR_compartment_ocid` the compartment containing your instances, this can be the root compartment.
- `TF_VAR_availability_domain` the name of the AD the instances are in.
- `TF_VAR_destination_availability_domain` the name of the AD to create new resources in.
- Stop applications running on the instances and then stop the instances in the console.
- Run `./backup.sh` which performs these actions:
- Inspects existing instances and volumes.
- Creates boot and block volume backups.
- Creates new boot and block volumes in the destination AD.
- **Note**: you will be prompted to continue.
- Optionally run `./terminate.sh` (you will be prompted to continue) or terminate instances in the console. Termination allows for ip and hostname reuse.
- Run `./move.sh` which performs these actions:
- Reads state from the run of the backup script.
- Creates instances from the boot volume backups created previously (you will be prompted to continue).
- Attaches the new block volumes
- **Note**: if you see a `409` error related to ip or hostname being in use that's because they haven't been released by the terminated instances. Wait a short time and rerun the script.
- SSH into the new instances and check things are running correctly.