def update():
"""
Update the resources of a running container.
"""
update = recv_proto(Update)
with container_lock(update.container_id.value, "update"):
logger.info("Updating resources for container %s",
update.container_id.value)
# Get the container ID
info = inspect_container(update.container_id.value)
lxc_container_id = info["ID"]
# Gather the resoures
max_mem = None
max_cpus = None
for resource in update.resources:
if resource.name == "mem":
max_mem = int(resource.scalar.value) * 1024 * 1024
if resource.name == "cpus":
max_cpus = int(resource.scalar.value) * 256
if resource.name == "ports":
logger.error(
"Unable to process an update to port configuration!")
if max_mem:
# Update the soft limit
write_metric(lxc_container_id, "memory.soft_limit_in_bytes",
max_mem)
# Figure out if we can update the hard limit
# If we reduce the hard limit and too much memory is in use, this
# can invoke an OOM.
current_mem = int(
read_metric(lxc_container_id, "memory.limit_in_bytes"))
if current_mem > max_mem:
write_metric(lxc_container_id, "memory.limit_in_bytes",
max_mem)
else:
logger.info("Skipping hard memory limit, would invoke OOM")
if max_cpus:
shares = max_cpus * 256
write_metric(lxc_container_id, "cpu.shares", shares)
logger.info("Finished processing container update")
def update():
"""
Update the resources of a running container.
"""
update = recv_proto(Update)
with container_lock(update.container_id.value, "update"):
logger.info("Updating resources for container %s", update.container_id.value)
# Get the container ID
info = inspect_container(update.container_id.value)
lxc_container_id = info.get("ID", info.get("Id"))
if lxc_container_id is None:
raise Exception("Failed to get full container ID")
# Gather the resoures
max_mem = None
max_cpus = None
for resource in update.resources:
if resource.name == "mem":
max_mem = int(resource.scalar.value) * 1024 * 1024
if resource.name == "cpus":
max_cpus = int(resource.scalar.value) * 256
if resource.name == "ports":
logger.error("Unable to process an update to port configuration!")
if max_mem:
# Update the soft limit
write_metric(lxc_container_id, "memory.soft_limit_in_bytes", max_mem)
# Figure out if we can update the hard limit
# If we reduce the hard limit and too much memory is in use, this
# can invoke an OOM.
current_mem = int(read_metric(lxc_container_id, "memory.limit_in_bytes"))
if current_mem > max_mem:
write_metric(lxc_container_id, "memory.limit_in_bytes", max_mem)
else:
logger.info("Skipping hard memory limit, would invoke OOM")
if max_cpus:
shares = max_cpus * 256
write_metric(lxc_container_id, "cpu.shares", shares)
logger.info("Finished processing container update")
