Beispiel #1
0
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")