Session
Schedule FOSDEM 2020
Containers

CANCELLED A way of GPU virtualization for container

UD2.208 (Decroly)
Shengbo Song
Please note that this talk has been cancelled as the speaker is unfortunately unable to attend FOSDEM. Containers are widely used in clouds due to their lightweight and scalability. GPUs have powerful parallel processing capabilities that are adopted to accelerate the execution of applications. In a cloud environment, containers may require one or more GPUs to fulfill the resource requirement of application execution, while on the other hand exclusive GPU resource of a container usually results in underutilized resource. Therefore, how to share GPUs among containers becomes an attractive problem to cloud providers. In this presentation, we propose an approach, called vCUDA, to sharing GPU memory and computing resources among containers. vCUDA partitions physical GPUs into multiple virtual GPUs and assigns the virtual GPUs to containers as request. Elastic resource allocation and dynamic resource allocation are adopted to improve resource utilization. The experimental results show that vCUDA only causes 1.015% of overhead by average and it effectively allocates and isolates GPU resources among containers.

Additional information

Type devroom

More sessions

2/1/20
Containers
Sascha Grunert
UD2.208 (Decroly)
Podman is the container management tool of your choice when it comes to boosting day-to-day development tasks around containers. The journey of Podman started as a drop-in replacement for docker, but nowadays it’s even more than just that. For example, Podman is capable of managing pods, running containers without being root and supports fine granular configuration possibilities.
2/1/20
Containers
Akihiro Suda
UD2.208 (Decroly)
The biggest problem of the OCI Image Spec is that a container cannot be started until all the tarball layers are downloaded, even though more than 90% of the tarball contents are often unneeded for the actual workload. This session will show state-of-the-art alternative image formats, which allow runtime implementations to start a container without waiting for all its image contents to be locally available. Especially, this session will put focus on CRFS/stargz and its implementation status in ...
2/1/20
Containers
Daniel Borkmann
UD2.208 (Decroly)
BPF as a foundational technology in the Linux kernel provides a powerful tool for systems developers and users to dynamically reprogram and customize the kernel to meet their needs in order to solve real-world problems and without having to be a kernel expert. Thanks to BPF we have come to the point to overcome having to carry legacy accumulated over decades of development grounded in a more traditional networking environment that is typically far more static than your average Kubernetes ...
2/1/20
Containers
Ralf Haferkamp
UD2.208 (Decroly)
Kata Containers provide a secure container runtime offering an experience close to that of native containers, while providing stronger workload isolation and host infrastructure security by using hardware virtualization technology. This is particularly useful when containers are used to host and run third-party applications. In this presentation, after a short intro to Kata, we will demonstrate how easy it is to install and use on openSUSE. We will show it in action both as part of a podman ...
2/1/20
Containers
Laurent Bernaille
UD2.208 (Decroly)
Kube-proxy enables access to Kubernetes services (virtual IPs backed by pods) by configuring client-side load-balancing on nodes. The first implementation relied on a userspace proxy which was not very performant. The second implementation used iptables and is still the one used in most Kubernetes clusters. Recently, the community introduced an alternative based on IPVS. This talk will start with a description of the different modes and how they work. It will then focus on the IPVS ...
2/1/20
Containers
Adrian Reber
UD2.208 (Decroly)
The difficult task to checkpoint and restore a process is used in many container runtimes to implement container live migration. This talk will give details how CRIU is able to checkpoint and restore processes, how it is integrated in different container runtimes and which optimizations CRIU offers to decrease the downtime during container migration. In this talk I want to provide details how CRIU checkpoints and restores a process. Starting from ptrace() to pause the process, how parasite code ...
2/1/20
Containers
Christian Brauner
UD2.208 (Decroly)
Recently the kernel landed seccomp support for SECCOMPRETUSER_NOTIF which enables a process (supervisee) to retrieve a fd for its seccomp filter. This fd can then be handed to another (usually more privileged) process (supervisor). The supervisor will then be able to receive seccomp messages about the syscalls having been performed by the supervisee. We have integrated this feature into userspace and currently make heavy use of this to intercept mknod(), mount(), and other syscalls in user ...