[nova-fake-virt]Restore compute restartability

Code Issues Proposed changes

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年09月25日 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

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@@ -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

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@@ -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

}