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Fix check for other peers ahead and node stalled. #9

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Fix check for other peers ahead and node stalled. #9

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44 changes: 21 additions & 23 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -46,43 +46,41 @@ const checkNode = async (nodeUrl, types) => {
//
// get relevant chain data
//
const [block, pendingExtrinsics, health] = await Promise.all([
const [block, health, peers] = await Promise.all([
api.rpc.chain.getBlock(),
api.rpc.author.pendingExtrinsics(),
api.rpc.system.health(),
api.rpc.system.peers(),
]);
const nPeers = health.peers.toNumber();
// const bestBlock = +block.block.header.number;
const bestBlock = +block.block.header.number;
// if we have no peers we should restart
if (nPeers === 0) {
process.exit(1)
}
console.log(nPeers);
// TODO: fix broken peer request
// const nPeersAhead = peers.toArray()
// .map((p) => +p.bestNumber > bestBlock + 10)
// .filter((ahead) => ahead === true)
// .length;
console.log(`${nPeers} peers connected`);

// Calculate the number of peers more then 10 blocks ahead
const nPeersAhead = peers.toArray()
.map((p) => +p.bestNumber > bestBlock + 10)
.filter((ahead) => ahead === true)
.length;

//
// try to read the last blocknum from a temporary file
//
// if it hasn't changed since the last run, and we are behind the
// majority of peer nodes, we may be stalled and should exit with an
// error
//
// TODO: fix broken peer request
// console.log(`${bestBlock} is our best block`);
// if (nPeersAhead > nPeers / 2) {
// const storage = await readFileAsync('/tmp/nodeup.lastblock');
// const lastBlocknum = parseInt(storage.toString());
// if (lastBlocknum === bestBlock) {
// console.log(`${nPeersAhead} of ${nPeers} peers are ahead of us`);
// console.log('throwing an error since the best block has not updated recently');
// process.exit(1);
// }
// await writeFileAsync('/tmp/nodeup.lastblock', bestBlock);
// }
console.log(`${bestBlock} is our best block`);
if (nPeersAhead > nPeers / 2) {
const storage = await readFileAsync('/tmp/nodeup.lastblock');
const lastBlocknum = parseInt(storage.toString());
if (lastBlocknum === bestBlock) {
console.log(`${nPeersAhead} of ${nPeers} peers are ahead of us`);
console.log('throwing an error since the best block has not updated recently');
process.exit(1);
}
await writeFileAsync('/tmp/nodeup.lastblock', bestBlock);
}
process.exit(0);
};

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