def issue_historical_queries_with_snapshot(network, snapshot_tx_interval):
network.txs.issue(network, number_txs=1)
for _ in range(1, snapshot_tx_interval):
network.txs.issue(network, number_txs=1, repeat=True)
last_tx = network.txs.get_last_tx(priv=True)
try:
network.wait_for_snapshot_committed_for(
seqno=last_tx[1]["seqno"])
break
except TimeoutError:
continue
def check_snapshots(args, network):
primary, _ = network.find_primary()
seqno = find_recovery_tx_seqno(primary)
if seqno:
# Check that primary node has produced a snapshot. The wait timeout is larger than the
# signature interval, so the snapshots should become available within the timeout.
assert args.sig_ms_interval < 3000
if not network.wait_for_snapshot_committed_for(
seqno, timeout=3, on_all_nodes=True):
raise ValueError(
f"No snapshot found after seqno={seqno} on primary {primary.local_node_id}"
)
def test_add_node_from_snapshot(
network, args, copy_ledger_read_only=True, from_backup=False
):
# Before adding the node from a snapshot, override at least one app entry
# and wait for a new committed snapshot covering that entry, so that there
# is at least one historical entry to verify.
network.txs.issue(network, number_txs=1)
for _ in range(1, args.snapshot_tx_interval):
network.txs.issue(network, number_txs=1, repeat=True)
last_tx = network.txs.get_last_tx(priv=True)
if network.wait_for_snapshot_committed_for(seqno=last_tx[1]["seqno"]):
break
target_node = None
snapshots_dir = None
if from_backup:
primary, target_node = network.find_primary_and_any_backup()
# Retrieve snapshot from primary as only primary node
# generates snapshots
snapshots_dir = network.get_committed_snapshots(primary)
new_node = network.create_node("local://localhost")
network.join_node(
new_node,
args.package,
args,
copy_ledger_read_only=copy_ledger_read_only,
target_node=target_node,
snapshots_dir=snapshots_dir,
from_snapshot=True,
)
network.trust_node(new_node, args)
with new_node.client() as c:
r = c.get("/node/state")
assert (
r.body.json()["startup_seqno"] != 0
), "Node started from snapshot but reports startup seqno of 0"
# Finally, verify all app entries on the new node, including historical ones
# from the historical ledger
network.txs.verify(node=new_node, include_historical=copy_ledger_read_only)
return network
