openstack/devstack
Code Issues Proposed changes

[nova-fake-virt]Restore compute restartability

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Since the stable-compute-uuid nova feature the compute nodes created via
  VIRT_DRIVER=fake
cannot be restarted as these computes are not writing the compute_id
file to disk at first startup. Therefore any subsequent restart will
fail as nova-compute will refuse to start due to the missing compute_id
file but having a service already in the DB.

After this patch fake-virt uses a variant of the fake virt driver that
actually writes compute_id file to disk. To allow multiple fake computes
running on the same machine each compute now has a separate state_path
created so each can store a separate compute_id file.

Signed-off-by: Balazs Gibizer <gibi@redhat.com>
Change-Id: I813cab3c89554d1e319b2b3e5c3affd8ec5d887e
This commit is contained in:
Balazs Gibizer
2025-09-25 19:39:26 +02:00
parent a3e37c86ca
commit f8b3c902be
2 changed files with 10 additions and 1 deletions
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9
lib/nova
View File

@@ -1085,6 +1085,15 @@ function start_nova_compute {
# gets its own configuration and own log file.
local fake_conf="${NOVA_FAKE_CONF}-${i}"
iniset $fake_conf DEFAULT host "${HOSTNAME}${i}"
# Ensure that each fake compute has its own state path so that it
# can have its own compute_id file
local state_path
state_path="$NOVA_STATE_PATH/${HOSTNAME}${i}"
COMPUTE_ID=$(uuidgen)
sudo mkdir -p "$state_path"
iniset $fake_conf DEFAULT state_path "$state_path"
# use the generated UUID as the stable compute node UUID
echo "$COMPUTE_ID" | sudo tee "$state_path/compute_id"
run_process "n-cpu-${i}" "$NOVA_BIN_DIR/nova-compute --config-file $NOVA_CPU_CONF --config-file $fake_conf"
done
else

2
lib/nova_plugins/hypervisor-fake
View File

@@ -36,7 +36,7 @@ function cleanup_nova_hypervisor {
# configure_nova_hypervisor - Set config files, create data dirs, etc
function configure_nova_hypervisor {
iniset $NOVA_CONF DEFAULT compute_driver "fake.FakeDriver"
iniset $NOVA_CONF DEFAULT compute_driver "fake.FakeDriverWithoutFakeNodes"
# Disable arbitrary limits
iniset $NOVA_CONF quota driver nova.quota.NoopQuotaDriver
}