prysm-pulse/k8s

Kubernetes

Requirements

• Kubernetes v1.11+ (for PriorityClass)
• Minikube (for now)

Starting minikube with v1.11

As of minikube 0.28.2, the default version of kubernetes is 1.10.0. In order to start a local cluster with v1.11.0, run the following:

minikube start --kubernetes-version=v1.11.0 --cpus 4

Geth's Genesis file

This file is the default provided by geth-genesis secret.

{                                                                               
    "config": {                                                                 
        "chainId": 1337,                                                        
        "homesteadBlock": 0,                                                    
        "eip155Block": 0,                                                       
        "eip158Block": 0                                                        
    },                                                                          
    "difficulty": "0x0",                                                      
    "gasLimit": "0x2100000",                                                    
    "alloc": {                                                                  
       "717c3a6e4cbd476c2312612155eb233bf498dd5b":                              
         { "balance": "0x1337000000000000000000" }                             
    }                                                                           
}

The private key for the allocation above is:

783da8ef5343c3019748506305d400bca8c324a5819f3a7f7fbf0c0a0d799b09

NOTE: Obviously, do not use this wallet key for anything with real money on it!

To update the genesis secret, change value in geth/genesis.secret.yaml to the base64 encoded string for the genesis.json.

Example:

cat /tmp/genesis.json | json-minify | base64

Deploying Geth Mainchain

First, launch the bootnode so that geth nodes can discover each other.

bazel run //k8s/geth:bootnode.deploy.apply

Then launch everything else.

bazel run //k8s:everything.apply

This creates a few nodes and one miner with CPU restrictions. After ~30 minutes, the miner has generated the DAG and begins mining. The miners have a stateful volume for their DAGs so that they do not have to regenerate them on restart.

Note: DAG generation time can be improved by giving the miner more CPU in the deployment yaml.

Bootstrapping the Beacon Chain

TODO: This process is currently manual and needs to be improved!

Using the private key above and the deployVRC tool, deploy the validator registration contract.

# get the address the node service
minikube service geth-nodes --url

Example response:

http://192.168.99.100:30051
http://192.168.99.100:31745

Using the first port provided (RPC). Run the deploy VRC tool

bazel run //contracts/validator-registration-contract/deployVRC --\
  --privKey=783da8ef5343c3019748506305d400bca8c324a5819f3a7f7fbf0c0a0d799b09 \
  --httpPath=http://192.168.99.100:30051

Example output:

INFO main: New contract deployed address=0x541AfaC5266c534de039B4A1a53519e76ea82846

Set this value for the vrcaddr flag in k8s/beacon-chain/beacon-chain.deploy.yaml.

Ensure that the beacon-chain and client docker images are up to date.

bazel run //beacon-chain:push_image
bazel run //client:push_image

Start the beacon chain nodes

bazel run //k8s/beacon-chain:everything.apply

Start the clients

bazel run //k8s/client:everything.apply

Accessing Geth Services

Check out the ethstats dashboard by querying minikube for the service URL.

minikube service geth-ethstats --url

Accessing the geth nodes.

minikube service geth-nodes --url

# Example output
http://192.168.99.100:30451
http://192.168.99.100:32164

The first URL will be the rpc endpoint and the second URL will be the websocket endpoint.

So we can use these values locally to connect to our local cluster.

bazel run //beacon-chain -- --web3provider=ws://192.168.99.100:32164