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|
test_clustering_instance_placement_scriptlet() {
# shellcheck disable=2039,3043,SC2034
local INCUS_DIR
setup_clustering_bridge
prefix="inc$$"
bridge="${prefix}"
# The random storage backend is not supported in clustering tests,
# since we need to have the same storage driver on all nodes, so use the driver chosen for the standalone pool.
poolDriver=$(incus storage show "$(incus profile device get default root pool)" | awk '/^driver:/ {print $2}')
# Spawn first node
setup_clustering_netns 1
INCUS_ONE_DIR=$(mktemp -d -p "${TEST_DIR}" XXX)
chmod +x "${INCUS_ONE_DIR}"
ns1="${prefix}1"
spawn_incus_and_bootstrap_cluster "${ns1}" "${bridge}" "${INCUS_ONE_DIR}" "${poolDriver}"
# The state of the preseeded storage pool shows up as CREATED
INCUS_DIR="${INCUS_ONE_DIR}" incus storage list | grep data | grep -q CREATED
# Add a newline at the end of each line. YAML has weird rules.
cert=$(sed ':a;N;$!ba;s/\n/\n\n/g' "${INCUS_ONE_DIR}/cluster.crt")
# Spawn a second node
setup_clustering_netns 2
INCUS_TWO_DIR=$(mktemp -d -p "${TEST_DIR}" XXX)
chmod +x "${INCUS_TWO_DIR}"
ns2="${prefix}2"
spawn_incus_and_join_cluster "${ns2}" "${bridge}" "${cert}" 2 1 "${INCUS_TWO_DIR}" "${INCUS_ONE_DIR}" "${poolDriver}"
# Spawn a third node
setup_clustering_netns 3
INCUS_THREE_DIR=$(mktemp -d -p "${TEST_DIR}" XXX)
chmod +x "${INCUS_THREE_DIR}"
ns3="${prefix}3"
spawn_incus_and_join_cluster "${ns3}" "${bridge}" "${cert}" 3 1 "${INCUS_THREE_DIR}" "${INCUS_ONE_DIR}" "${poolDriver}"
INCUS_DIR="${INCUS_ONE_DIR}" ensure_import_testimage
# Check only valid scriptlets are accepted.
! incus config set instances.placement.scriptlet=foo || false
# Set basic instance placement scriptlet that logs member info and statically targets to 2nd node.
# And by extension checks each of the scriptlet environment functions are callable.
# Also checks that the instance_resources are provided as expected.
cat << EOF | incus config set instances.placement.scriptlet=-
def instance_placement(request, candidate_members):
instance_resources = get_instance_resources()
log_info("instance placement started: ", request, ", ", instance_resources)
if request.reason != "new":
return "Expecting reason new"
if request.project != "default":
return "Expecting project default"
if request.config["limits.memory"] != "512MiB":
return "Expecting config limits.memory of 512MiB"
if instance_resources.cpu_cores != 1:
return "Expecting cpu_cores of 1"
if instance_resources.memory_size != 536870912:
return "Expecting memory_size of 536870912"
if instance_resources.root_disk_size != 209715200:
return "Expecting root_disk_size of 209715200"
# Log info, state and resources for each candidate member.
for member in candidate_members:
log_info("instance placement member: ", member)
log_info("instance placement member resources: ", get_cluster_member_resources(member.server_name))
log_info("instance placement member state: ", get_cluster_member_state(member.server_name))
# Set statically target to 2nd member (alphabetical).
candidate_names = sorted([candidate.server_name for candidate in candidate_members])
set_target(candidate_names[1])
return # No error.
EOF
# Check that instance placement scriptlet is statically targeting new instances.
# Send each request to a different cluster member to test scriptlet replication to other members.
# Create instance with limits set on instance to appease intance_resources checks.
INCUS_DIR="${INCUS_ONE_DIR}" incus init testimage c1 -c limits.memory=512MiB -c limits.cpu=1 -d root,size=200MiB
# Create instances with limits set on a profile to test expansion and to appease intance_resources checks.
INCUS_DIR="${INCUS_TWO_DIR}" incus profile create foo
INCUS_DIR="${INCUS_TWO_DIR}" incus profile show default | incus profile edit foo
INCUS_DIR="${INCUS_TWO_DIR}" incus profile set foo limits.cpu=1 limits.memory=512MiB
INCUS_DIR="${INCUS_TWO_DIR}" incus profile device set foo root size=200MiB
INCUS_DIR="${INCUS_TWO_DIR}" incus init testimage c2 -p foo
INCUS_DIR="${INCUS_THREE_DIR}" incus init testimage c3 -p foo
INCUS_DIR="${INCUS_ONE_DIR}" incus info c1 | grep -q "Location: node2"
INCUS_DIR="${INCUS_ONE_DIR}" incus info c2 | grep -q "Location: node2"
INCUS_DIR="${INCUS_ONE_DIR}" incus info c3 | grep -q "Location: node2"
INCUS_DIR="${INCUS_ONE_DIR}" incus delete -f c1 c2 c3
INCUS_DIR="${INCUS_ONE_DIR}" incus profile delete foo
# Set instance placement scriptlet that returns an error and test instance creation fails.
cat << EOF | incus config set instances.placement.scriptlet=-
def instance_placement(request, candidate_members):
log_error("instance placement not allowed") # Log placement error.
fail("Instance not allowed") # Fail to prevent instance creation.
EOF
! INCUS_DIR="${INCUS_ONE_DIR}" incus init testimage c1 || false
# Set instance placement scriptlet containing runtime error in it and test instance creation fails.
cat << EOF | incus config set instances.placement.scriptlet=-
def instance_placement(request, candidate_members):
log_info("Accessing invalid field ", candidate_members[4])
return
EOF
! INCUS_DIR="${INCUS_ONE_DIR}" incus init testimage c1 || false
# Set instance placement scriptlet to one that sets an invalid cluster member target.
# Confirm that we get a placement error.
cat << EOF | incus config set instances.placement.scriptlet=-
def instance_placement(request, candidate_members):
# Set invalid member target.
result = set_target("foo")
log_warn("Setting invalid member target result: ", result)
return
EOF
! INCUS_DIR="${INCUS_ONE_DIR}" incus init testimage c1 -c cluster.evacuate=migrate || false
# Create an instance
incus config unset instances.placement.scriptlet
INCUS_DIR="${INCUS_ONE_DIR}" incus init testimage c1 -c cluster.evacuate=migrate --target node1
# Set basic instance placement scriptlet that statically targets to 3rd member.
cat << EOF | incus config set instances.placement.scriptlet=-
def instance_placement(request, candidate_members):
log_info("instance placement started: ", request)
if request.reason != "evacuation":
return "Expecting reason evacuation"
# Log info, state and resources for each candidate member.
for member in candidate_members:
log_info("instance placement member: ", member)
# Set statically target to 3rd member.
# Note: We expect the candidate members to not contain the member being evacuated, and thus the 3rd
# member is the 2nd entry in the candidate_members list now.
candidate_names = sorted([candidate.server_name for candidate in candidate_members])
set_target(candidate_names[1])
return # No error.
EOF
# Evacuate member with instance and check its moved to 2nd member.
INCUS_DIR="${INCUS_ONE_DIR}" incus cluster evacuate node1 --force
INCUS_DIR="${INCUS_ONE_DIR}" incus cluster show node1 | grep -q "status: Evacuated"
INCUS_DIR="${INCUS_ONE_DIR}" incus info c1 | grep -q "Location: node3"
INCUS_DIR="${INCUS_ONE_DIR}" incus delete -f c1
# Delete the storage pool
printf 'config: {}\ndevices: {}' | INCUS_DIR="${INCUS_ONE_DIR}" incus profile edit default
INCUS_DIR="${INCUS_ONE_DIR}" incus storage delete data
# Shut down cluster
INCUS_DIR="${INCUS_ONE_DIR}" incus admin shutdown
INCUS_DIR="${INCUS_TWO_DIR}" incus admin shutdown
INCUS_DIR="${INCUS_THREE_DIR}" incus admin shutdown
sleep 0.5
rm -f "${INCUS_ONE_DIR}/unix.socket"
rm -f "${INCUS_TWO_DIR}/unix.socket"
rm -f "${INCUS_THREE_DIR}/unix.socket"
teardown_clustering_netns
teardown_clustering_bridge
kill_incus "${INCUS_ONE_DIR}"
kill_incus "${INCUS_TWO_DIR}"
kill_incus "${INCUS_THREE_DIR}"
# shellcheck disable=SC2034
INCUS_NETNS=
}
|
