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adds shred-version to ip-echo-server response

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When starting a validator, the node initially joins gossip with
shred_verison = 0, until it adopts the entrypoint's shred-version:
https://github.com/solana-labs/solana/blob/9b182f408/validator/src/main.rs#L417

Depending on the load on the entrypoint, this adopting entrypoint
shred-version through gossip sometimes becomes very slow, and causes
several problems in gossip because we have to partially support
shred_version == 0 which is a source of leaking crds values from one
cluster to another. e.g. see
https://github.com/solana-labs/solana/pull/17899
and the other linked issues there.

In order to remove shred_version == 0 from gossip, this commit adds
shred-version to ip-echo-server response. Once the entrypoints are
updated, on validator start-up, if --expected_shred_version is not
specified we will obtain shred-version from the entrypoint using
ip-echo-server.
This commit is contained in:
behzad nouri
2021-06-17 14:52:56 -04:00
parent 46c805fb90
commit 598093b5db
9 changed files with 120 additions and 32 deletions
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programs/bpf/Cargo.lock generated
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@ -3360,6 +3360,7 @@ dependencies = [
"socket2",
"solana-clap-utils",
"solana-logger 1.8.0",
"solana-sdk",
"solana-version",
"tokio 1.4.0",
"url",