Vhost user container

variant does not approach me. Perhaps there..

Vhost user container

GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Host block devices can be assigned to container as ephemeral or persistent storage.

But user can only add kernel based block device to Kata container currently. Even userspace storage application like SPDK already has a proven vhost solution which can accelerate IO performance a lot. Seems userspace storage devices like vhost-user-blk and vhost-user-scsi still can't be hotplugged to run a kata container.

In the source code of Kata repos, most code part of vhost-user storage devices already exists. Also, a docker storage plugin can be created to simplify the handmade SPDK vhost-user operations. It would be easy and convenient for Kata user to try and apply SPDK accelerated storage device in their container workload. Skip to content.

vhost user container

Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Labels enhancement needs-review. Copy link Quote reply. Which feature do you think can be improved? How can it be improved? Before raising this feature request I've drafted a POC patch set in kata runtime and verified the work of run Kata with SPDK vhost-user-blk deivces as ephemeral or persistent storage.

Assign vhost-user-blk device to Kata container as ephemeral or persistent storage Two parameters are used to set in toml file: 1. Reserved number of Linux device number and are used to identify vhost-user-blk and vhost-user-scsi devices. Kata-runtime can append vhost-user-blk device to the device list of a container.

CI test: remove md change Two parameters are used to set in toml file: 1. And handle volumes who is a block device and in VhostUserBlk type. Pennyzct closed this in Mar 19, Pennyzct added a commit that referenced this issue Mar 19, This commit was created on GitHub. Sign up for free to join this conversation on GitHub.Maintained by : the Docker Community. Supported architectures : more info amd64arm32v6arm32v7arm64v8ippc64lesx.

The RabbitMQ server is written in the Erlang programming language and is built on the Open Telecom Platform framework for clustering and failover. Client libraries to interface with the broker are available for all major programming languages. One of the important things to note about RabbitMQ is that it stores data based on what it calls the "Node Name", which defaults to the hostname. This will start a RabbitMQ container listening on the default port of If you give that a minute, then do docker logs some-rabbityou'll see in the output a block similar to:.

Note the database dir there, especially that it has my "Node Name" appended to the end for the file storage. RabbitMQ contains functionality which explicitly tracks and manages memory usage, and thus needs to be made aware of cgroup-imposed limits.

The value of this environment variable is interpreted as follows:. The main behavioral difference is in how percentages are handled.

See Docker's --secret documentation for more details. A small selection of the possible environment variables are defined in the Dockerfile to be passed through the docker engine listed below. Note : HiPE is disabled since version 3. See the RabbitMQ "Configuration" for more information about various configuration options. Accroding to the official documentation:.

This will increase server throughput at the cost of increased startup time. It is therefore important to take that startup delay into consideration when configuring health checks, automated clustering etc. Creating a Dockerfile will have them enabled at runtime. To see the full list of plugins present on the image rabbitmq-plugins list.

Additional configuration keys would be specified as a list. This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container mount your source code and start the container to start your appas well as the base to build other images off of.

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This image is based on the popular Alpine Linux projectavailable in the alpine official image. This variant is highly recommended when final image size being as small as possible is desired. The main caveat to note is that it does use musl libc instead of glibc and friendsso certain software might run into issues depending on the depth of their libc requirements.

However, most software doesn't have an issue with this, so this variant is usually a very safe choice. To minimize image size, it's uncommon for additional related tools such as git or bash to be included in Alpine-based images. Using this image as a base, add the things you need in your own Dockerfile see the alpine image description for examples of how to install packages if you are unfamiliar.

View license information for the software contained in this image. As with all Docker images, these likely also contain other software which may be under other licenses such as Bash, etc from the base distribution, along with any direct or indirect dependencies of the primary software being contained.

As for any pre-built image usage, it is the image user's responsibility to ensure that any use of this image complies with any relevant licenses for all software contained within. Try the two-factor authentication beta.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Already on GitHub? Sign in to your account. With this patch set, kata container can run with vhost-usre-blk device provided by SPDK. Fixes : Thanks for raising dong-liuliu. Please could you look at adding some new unit tests for this PR. This doesn't seem ideal to me. Thanks for your comments jodh-intel. Let me add UT and fix vendor qmp's change later. The reason why user has to manually create a bunch of files is because of the limitation of OCI spec.

But vhost-user devices is specified by path of its socket. So I have to use the trick to emulate a sys directory for uevent, and use Major number and as the signs of vhost-user-blk and vhost-user-scsi devices.

Yes, the prepare operations doesn't seem ideal to users. We should use a well defined scheme for where we expect vhost-user sockets to live. I understand the OCI spec is limiting us in terms of the kind of device paths that we can pass to the containers, and it basically has to be a device node, either a block or a character one.

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Side note here: We should consider extending the OCI spec for that, as devices can be more than this. They can live behind sockets for example Instead of going through the pain of creating an ad-hoc device node under e. The only reason why we need to parse the uevent file is in order to get the actual complete host device path through GetHostPath. Can we simply infer the socket path from the device node path itself? In your example, we would create the node as:.

So the device node name carries all the information we need.

31. Vhost Sample Application

That way, the only artifact that you have to create when setting your vhost-user target is this fake device node. Besides those changes, I think the PR looks good overall Except for the vendor part, but I think you fixed that in govmm already.

How would you name vhost-user types? Would you infer that from how it's used and then the kata code would provide the nameor is there some standard way to go from device to name?

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I assume in your example, the 0 at the end of vhostblk0 is the same as the minor number. But the part I am wondering about is the block and vhostblk. As jodh advised, the patch set is still lack of a full document and unit test. And I'm working on them, will resubmit the patch set with UT and documetation next week.

Same for the network and filesystem vhost-user types.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account.

vhost user container

This doc includes instructions covering how to install and setup SPDK vhost-user target, construct a vhost-user-blk device based memory, configure the vhost-user-blk device to be available for kata container, and run kata container with SPDK vhost-user-blk device via docker.

Fixes : Add a PR to Kata test repo to add lowercase "vhost" into spell dictionary. Thanks for raising dong-liuliu. Thanks dong-liuliu. Great diagrams too!

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This should have gone after the runtime PR is merged. Thanks for your notice!

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So I'll do my best effort to get that code patch approved by maintainers in the following days. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. New issue. Conversation 68 Commits 1 Checks 0 Files changed. Copy link Quote reply. This comment has been minimized. Sign in to view. Assign vhost-user-blk device to Kata container as ephemeral or persistent storage View changes. These instructions cover how to install and setup SPDK vhost-user target, construct a vhost-user-blk device based memory, configure the vhost-user-blk device to be available for kata container, and run kata container with SPDK vhost-user-blk device via docker.

Hide details View details GabyCT merged commit a51efa9 into kata-containers : master Jan 23, 4 checks passed. It's really a good idea. Let me follow your suggestion later with a new PR. Sign up for free to join this conversation on GitHub.Container becomes more and more popular for strengths, like low overhead, fast boot-up time, and easy to deploy, etc. How to use DPDK to accelerate container networking becomes a common question for users. The virtual device, virtio-user, with unmodified vhost-user backend, is designed for high performance user space container networking or inter-process communication IPC.

The overview of accelerating container networking by virtio-user is shown in Fig. How is memory shared? So only those virtual memory regions aka, hugepages initialized in DPDK are sent to backend. It restricts that only addresses in these areas can be used to transmit or receive packets. Data Plane Development Kit Flow Bifurcation How-to Guide 4. Generic flow API - examples 5. PVP reference benchmark setup using testpmd 6. VF daemon VFd 7. Overview 7.

Kuryr Kubernetes vhost-user port integration

Sample Usage 7. Limitations 8. Overview The virtual device, virtio-user, with unmodified vhost-user backend, is designed for high performance user space container networking or inter-process communication IPC.

Sample Usage Here we use Docker as container engine.

Kuryr Kubernetes vhost-user port integration

It also applies to LXC, Rocket with some minor changes. Compile DPDK. Limitations We have below limitations in this solution: Cannot work with —huge-unlink option. As we need to reopen the hugepage file to share with vhost backend. Cannot work with —no-huge option. Currently, DPDK uses anonymous mapping under this option which cannot be reopened to share with vhost backend. If you have more regions especially when 2MB hugepages are usedthe option, —single-file-segments, can help to reduce the number of shared files.

Docker Container Tutorial #9 container hostnames

That will bring confusion when sharing hugepage files with backend by name.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I also declared both. It's been a while since I configured virtual hosts. However, in practice, visiting either dummy.

Please note this is a different question from how to host multiple apps on the same domain with different port. Note that I use basically the same volumes as you did in your docker-compose. To test, make sure you have tests. How are we doing? Please help us improve Stack Overflow.

Take our short survey. Learn more. Multiple vhosts on one and the same docker container Ask Question. Asked 2 years, 11 months ago. Active 6 months ago. Viewed 15k times. I'm trying to run two different domains on one and the same Docker container and port. The Docker container runs CentOS. This is what I have, added at the end of httpd. What did I miss? It's unclear to me whether this is an Apache issue or a Docker one. Fabien Snauwaert Fabien Snauwaert 2, 2 2 gold badges 32 32 silver badges 47 47 bronze badges.

Active Oldest Votes. Turns out this was an Apache configuration issue. Docker had nothing to do with the matter. My recommendation would be to take a step back and try to make it work with a simple example.

In a test directory, use your sample: File: httpd.

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Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Cryptocurrency-Based Life Forms. Q2 Community Roadmap. Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap.Open vSwitch or any other virtual switch can be built with DPDK datapath 3for this datapath virtual switch provisions vhost-user port.

DPDK applications which use vhost-user port have more network performance compared to applications which use veth pair with tap interfaces. Also there is another use case, where vhost-user ports are passed to VM. Kuryr-kubernetes has to move this vhost-user socket file to path available for pod.

vhost user container

No new pod vif driver will be introduced. From user point of view there is no difference in pod definition. To request vhost-user port as a main port no need to do something special. When vhost-user port is additional interface it can be defined with Network Attachment Definition 6. Open vSwitch supports DPDK ports only in special bridges with type netdev, therefore integration bridge should have netdev type, otherwise OVS dpdk port will not work. Kuryr-kubernetes uses os-vif, this library does all necessary work for vif of VIFVhostuser type to set up bridge and create port.

It will be done by mountVolumes in pod yaml file like that:. Single mount point will be provided for several pods CONF. Configuration file will be created there for DPDK application.

It will contain auxiliary information: socket name, mac address, ovs port mode. It might look like:. Name of configuration file will contain container id concatenated by dash with ifname for this interface.

DPDK application will use vhostname to determine vhost-user socket name. To get vhost user socket name inside container user has to read configuration file.

Container identifier will be required for it. Following bash command will help to get it inside container.

vhost user container

Kuryr-kubernetes can produce multiple ports per one pod, following command can be used to list all available ports. Value from vhostname field should be used for launching DPDK application. The client mode from kuryr-kubernetes point of view, it is mode when ovs-vswitchd creates and listens the vhost-user socket, which is created by the command below:.

This mode is not robust because after restarting ovs-vswitchd will recreate sockets by initial path, all clients have to reestablish connection and kuryr-kubernetes has to move sockets again. But this feature affects containeraized cni plugin, due to it requeres the same mount point for source and destination of vhostuser socket file.


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