Sentnl.io

Automated Snapshot Service for WAX

This docker container:

1. Sets up a running EOSIO process on the chain of your choosing.
2. Install Python that takes hourly snapshots and pushes them Amazon S3 or Wasabi.
3. Autorestarts on failures using the last snapshot taken.
4. Prunes Snapshots on S3/Wasabi to only keep last 3 days.

💷 NOTE that Wasabi only costs £5 pcm for 1TB 💷

ENV Variables - These will make sense once you get into the Installation Part of the process.

ENV & ARG	Value	Description
CHAIN_NAME	wax	Used in P2P download from eosnation
SNAPSHOT_NAME	http://x/snapshot.tar.gz	The initial snapshot to start with
WAX_BINARY	wax-leap-501wax01	Which package to install from APT
ENDPOINT_URL	https://s3.eu-central-1.wasabisys.com	Wasabi/S3 endpoint URL for downloads
AWS_ACCESS_KEY_ID	XXXXXXXXXXXXXXXX	Wasabi/S3 access key
AWS_SECRET_ACCESS_KEY	XXXXXXXXXXXXXXXX	Wasabi/S3 secret key
WASABI_BUCKET	waxtest2	Wasabi/S3 bucketname for snapshots
RETENTION_DAYS	2	Amount of days to keep snapshots

Installation Steps to get started

Installation Requirements

• Docker
• Amazon S3 account or Wasabi
• Coffee

Step 1 - Setup your Amazon S3 or Wasabi account.

1. Setup a Amnazon S3 or Wasabi account
   • https://wasabi.com
   • https://aws.amazon.com/s3/
2. Create a bucket. (Remember the name)
3. Create your API keys. Make sure they have permissions to read and write to the bucket.

Step 2 - Build the docker container from github.

The first step is to buld the docker container from github

The following ENV variables need to be passed:

• SNAPSHOT_NAME - The URL link of a snapshot to download that nodeos uses upon starting. This ensures your node syncs up to the network really fast. ❗ Only tar.gz is currently supported.
• WAX_BINARY - Specifies the Nodeos APT package you want to install (See here for more details - https://eosswedenorg.github.io/apt/wax/bionic) ❤️ to EOSsweden for the APT service.

To build it:

 docker build  https://github.com/ankh2054/snapshot-service.git  \
 -t snapshot.service \
 --build-arg SNAPSHOT_NAME=https://snapshots-cdn.eossweden.org/wax/5.x/latest \
 --build-arg WAX_BINARY=wax-leap-501wax01

Step 3 - Running the docker container.

The final step is to start the container.

The following ENV variables need to be passed:

• CHAIN_NAME - The name of the chain to take snapshots for. ❗ Please note that only WAX is currently supported.
• WAX_BINARY - Specifies the Nodeos APT package you want to install (See here for more details - https://eosswedenorg.github.io/apt/wax/bionic) ❤️ to EOSsweden for the APT service.
• ENDPOINT_URL - The Wasabi/S3 endpoint URL for your buckets These can be found within your S3/Wasabni control panels.
• AWS_ACCESS_KEY_ID - Your Wasabi/S3 API access key
• AWS_SECRET_ACCESS_KEY - Your Wasabi/S3 API secret key
• WASABI_BUCKET - The name of your bucket where to files will be uploaded to.
• RETENTION_DAYS - The amount of days to keep snapshots on S3/Wasabi

To run it:

docker run  --name snapshot.service.wax  -d  --expose 8888 \
-e 'CHAIN_NAME=wax' \
-e 'WAX_BINARY=wax-leap-501wax01' \
-e 'ENDPOINT_URL=https://s3.eu-central-1.wasabisys.com' \
-e 'AWS_ACCESS_KEY_ID=xxxxxxxxxxx' \
-e 'AWS_SECRET_ACCESS_KEY=xxxxxxxxxxx' \
-e 'WASABI_BUCKET=waxtest2' \
-e 'RETENTION_DAYS=2' \
snapshot.service:latest

That is it - the service will now take hourly snapshots for you.

In the next coming weeks we will be creating a frontend for the service to display the available snapshots.

Troubleshooting

• You can check the container is running without any errors.

docker logs snapshot.service.wax

• Check nodeos is running on your container. Note that this takes 2-3 minutes to sync up once you start the container.

curl http://$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' snapshot.service.wax):8888/v1/chain/get_info

• Technically there is no need to expose port 8888, but it's there incase you want to monitor this node with your monitoring system. If you dont run intend on monitoring the service remove the --expose option during the container run.

ToDo

1. Allow for both a mainnet and testnet on single container.
2. Automate APT sources to be installed.
3. Change container to run as specific user called snapshot and not root.
4. Allow to keep weekly snapshots ( add metadata to prevent deletion after 3 days)