Deploying Polkadot node on Akash

Parity has a docker image on Docker Hub so for deploying we need only configure SDL file which will be used on Akashlytics.

Requirements for Validator on Polkadot:

CPU — Intel(R) Core(TM) i7–7700K CPU @ 4.20GHz.

Storage — A NVMe solid state drive. Should be reasonably sized to deal with blockchain growth. Starting around 80GB — 160GB will be okay for the first six months of Polkadot, but will need to be re-evaluated every six months.

Memory — 64GB ECC.

Configured SDL:

---
version: "2.0"
services:
  polkadot:
    image: parity/polkadot
    expose:
      - port: 30333
        as: 30333
        to:
          - global: true
      - port: 9933
        as: 9933
        to:
          - global: true
      - port: 9944
        as: 9944
        to:
          - global: true
    args:
    - "--chain=polkadot"
    - "--ws-external"
    - "--rpc-external"
    - "--rpc-cors=*"
profiles:
  compute:
    polkadot-profile:
      resources:
        cpu:
          units: 4.0
        memory:
          size: 64Gi
        storage:
          size: 128Gi
  placement:
    westcoast:
      pricing:
        polkadot-profile:
          denom: uakt
          amount: 1000
deployment:
  polkadot:
    westcoast:
      profile: polkadot-profile
      count: 1

Chain type and requested resources can be changed in SDL.

This SDL will deploy Polkadot node on Polkadot chain.

About arguments:

• Use the --chain <chainspec> option to select the chain. Can be polkadot, kusama, westend, rococo, or a custom chain spec.
• Use the --rpc-external flag to expose RPC ports and — ws-external to expose websockets. Not all RPC calls are safe to allow and you should use an RPC proxy to filter unsafe calls.
• Select ports with the --rpc-port and --ws-port options.
• To limit the hosts who can access, use the --rpc-cors option.

After deploying we will see this:

Forwarded Ports:

P2P: 30333
RPC: 9933
WebSocket: 9944

RPC can be found by clicking on *****:9933 port. Your browser will open provider:port link.

Curl request with RPC:

curl -X POST -H 'content-type:application/json' --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"system_chain"
}'  http://provider.edgenet-3.ca.aksh.pw:30044/

If everything fine then RPC will return a response with chain:

{"jsonrpc":"2.0","result":"Polkadot","id":1}

Run a Validator on Polkadot:

Run a Validator (Polkadot) · Polkadot Wiki

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