slirp4netns | User-mode networking for unprivileged network namespaces | Networking library

by rootless-containers C Version: v1.2.0 License: GPL-2.0

X-Ray Key Features Code Snippets Community Discussions(8)Vulnerabilities Install Support

kandi X-RAY | slirp4netns Summary

slirp4netns is a C library typically used in Networking applications. slirp4netns has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

slirp4netns provides user-mode networking ("slirp") for unprivileged network namespaces.

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Quality

Security

License

Reuse

Support

slirp4netns has a low active ecosystem.

It has 550 star(s) with 75 fork(s). There are 12 watchers for this library.

It had no major release in the last 12 months.

There are 37 open issues and 84 have been closed. On average issues are closed in 73 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of slirp4netns is v1.2.0

Quality

slirp4netns has 0 bugs and 0 code smells.

Security

slirp4netns has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

slirp4netns code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

slirp4netns is licensed under the GPL-2.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

slirp4netns releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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slirp4netns Key Features

No Key Features are available at this moment for slirp4netns.

slirp4netns Examples and Code Snippets

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Community Discussions

Trending Discussions on slirp4netns

Podman unable to mount local file into container

rootless podman can not run some commands

How to setup internal and external networking for rootless containers with podman

Docker version is different from what was intended from the command

Podman pod disappears after a few days, but process is still running and listening on a given port

Uninstalling Docker

How are the --network options available in podman?

podman MongoDB docker-entrypoint.sh permission denied

QUESTION

Podman unable to mount local file into container

Asked 2021-Dec-20 at 07:31

I'm planning to move away from Docker to Podman. I use docker-compose a lot so am planning to switch to podman-compose as well.

However I'm stuck at the simplest of podman examples, I can't seem to mount a volume onto my container? Obviously I'm doing something wrong however I cant figure out what it is.

My source file definitely exists on my (hardware) host (so not the podman machine). but I keep getting the error 'no such file or directory'.

Funny thing is if I manually create the same file locally on the podman machine (podman machine ssh --> touch /tmp/test.txt) it works perfectly fine.

Question is;

should I (manually?) mount all my local files onto the Fedora VM (podman machine) so that in turn this Fedora mount can be used in my actual container? and if so, how do I do this?
The podman run cmd below should work and there is something else I'm doing wrong?

...

ANSWER

Answered 2021-Dec-20 at 07:31

As mentioned by @ErikSjölund there has been an active treat on https://github.com/containers/podman. Apparantely Centos (Podman Machine) does not (yet) support different types of volume creation on the machine.

It's not perse Podman lacking this feature it's waiting for CentOS to support this feature as well.

However, should you want to mount a local directory onto the machine I recommend have a look at https://github.com/containers/podman/issues/8016#issuecomment-995242552. It describes how to do a read-only mount on CoreOS (or break compatibility with local version).

Info:

https://github.com/containers/podman/pull/11454 https://github.com/containers/podman/pull/12584

Source https://stackoverflow.com/questions/70275279

QUESTION

rootless podman can not run some commands

Asked 2021-Nov-22 at 14:47

I had a problem with gitlab running podman commands with gitlab-runner user and I could not see the created containers with my user. I chaned the user as described in Change Gitlab CI Runner user. I ran the gitlab pipeline again and it went successfully through 3 steps and created a podman pod and 2 other containers in it. Suddenly it stoped by a podman run for the last container. I checked the server and gave podman ps -a but nothing happend after pressing enter and I could still write in command line! I wrote podman images list and I could see the images list (2 images have the same id and I can not remove them!!). I tried sudo podman ps and it worked! Some commands just work and some commands are not working as rootless. my user can not do podman run from Gitlab but on the server my user can run podman run hello-world! I get no error just it remains in that state and I have to cancle the job.

I am using centos 8, podman 3.3.1. sudo podman info:

...

ANSWER

Answered 2021-Nov-18 at 19:56

Is this problem reproducible? Why I am asking because I think it should not be the case with podman but a specific issue at your end.

Source https://stackoverflow.com/questions/70025802

QUESTION

How to setup internal and external networking for rootless containers with podman

Asked 2021-Oct-27 at 19:52

I am trying to get networking working with rootless containers using podman. Getting either external networking up and running or internal networking is not the issue. Using the --network option, containers are able to see each other. However ping 8.8.8.8 does not work. Starting containers without --network or with --network=slirp4netns ping 8.8.8.8 does work as expected. Of course in the latter case, there is no internal networking. What I think this tells me is that host is not blocking external access from within containers. The issues that I am facing is that I seem to be unable to get both internal and external networking working within containers at the same time.

...

ANSWER

Answered 2021-Oct-21 at 17:36

I just tried this on RHEL 8 and I was able to reproduce this issue. We also figured out the issue (I think). Try the following:

sudo sysctl -w net.ipv4.ping_group_range="0 2147483647"

You might be being limited by the group range and /etc/subuid /etc/subgid:

https://man7.org/linux/man-pages/man7/icmp.7.html

I'm not sure what the long term solution is yet, but if this works, you can likely fix it with sysctl for now.

Source https://stackoverflow.com/questions/69636101

QUESTION

Docker version is different from what was intended from the command

Asked 2021-May-13 at 19:56

[root@asok-4-openstack yum.repos.d]# yum install docker-ce-20.10.2*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: la.mirrors.clouvider.net
 * extras: mirrors.ocf.berkeley.edu
 * updates: sjc.edge.kernel.org
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 3:20.10.2-3.el7 will be installed
--> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Processing Dependency: containerd.io >= 1.4.1 for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Processing Dependency: docker-ce-cli for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.2-3.el7.x86_64
--> Running transaction check
---> Package container-selinux.noarch 2:2.119.2-1.911c772.el7_8 will be installed
---> Package containerd.io.x86_64 0:1.4.4-3.1.el7 will be installed
---> Package docker-ce-cli.x86_64 1:20.10.6-3.el7 will be installed
--> Processing Dependency: docker-scan-plugin(x86-64) for package: 1:docker-ce-cli-20.10.6-3.el7.x86_64
---> Package docker-ce-rootless-extras.x86_64 0:20.10.6-3.el7 will be installed
--> Processing Dependency: fuse-overlayfs >= 0.7 for package: docker-ce-rootless-extras-20.10.6-3.el7.x86_64
--> Processing Dependency: slirp4netns >= 0.4 for package: docker-ce-rootless-extras-20.10.6-3.el7.x86_64
--> Running transaction check
---> Package docker-scan-plugin.x86_64 0:0.7.0-3.el7 will be installed
---> Package fuse-overlayfs.x86_64 0:0.7.2-6.el7_8 will be installed
--> Processing Dependency: libfuse3.so.3(FUSE_3.2)(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
--> Processing Dependency: libfuse3.so.3(FUSE_3.0)(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
--> Processing Dependency: libfuse3.so.3()(64bit) for package: fuse-overlayfs-0.7.2-6.el7_8.x86_64
---> Package slirp4netns.x86_64 0:0.4.3-4.el7_8 will be installed
--> Running transaction check
---> Package fuse3-libs.x86_64 0:3.6.1-4.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

======================================================================================
 Package                   Arch   Version                      Repository        Size
======================================================================================
Installing:
 docker-ce                 x86_64 3:20.10.2-3.el7              docker-ce-stable  27 M
Installing for dependencies:
 container-selinux         noarch 2:2.119.2-1.911c772.el7_8    extras            40 k
 containerd.io             x86_64 1.4.4-3.1.el7                docker-ce-stable  33 M
 docker-ce-cli             x86_64 1:20.10.6-3.el7              docker-ce-stable  33 M
 docker-ce-rootless-extras x86_64 20.10.6-3.el7                docker-ce-stable 9.2 M
 docker-scan-plugin        x86_64 0.7.0-3.el7                  docker-ce-stable 4.2 M
 fuse-overlayfs            x86_64 0.7.2-6.el7_8                extras            54 k
 fuse3-libs                x86_64 3.6.1-4.el7                  extras            82 k
 slirp4netns               x86_64 0.4.3-4.el7_8                extras            81 k

Transaction Summary
======================================================================================
Install  1 Package (+8 Dependent packages)

Total download size: 107 M
Installed size: 438 M
Is this ok [y/d/N]: y
Downloading packages:
(1/9): container-selinux-2.119.2-1.911c772.el7_8.noarch.rpm    |  40 kB  00:00:00
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-20.10.2-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Public key for docker-ce-20.10.2-3.el7.x86_64.rpm is not installed
(2/9): docker-ce-20.10.2-3.el7.x86_64.rpm                      |  27 MB  00:00:00
(3/9): containerd.io-1.4.4-3.1.el7.x86_64.rpm                  |  33 MB  00:00:00
(4/9): docker-ce-cli-20.10.6-3.el7.x86_64.rpm                  |  33 MB  00:00:00
(5/9): docker-scan-plugin-0.7.0-3.el7.x86_64.rpm               | 4.2 MB  00:00:00
(6/9): docker-ce-rootless-extras-20.10.6-3.el7.x86_64.rpm      | 9.2 MB  00:00:00
(7/9): fuse-overlayfs-0.7.2-6.el7_8.x86_64.rpm                 |  54 kB  00:00:00
(8/9): slirp4netns-0.4.3-4.el7_8.x86_64.rpm                    |  81 kB  00:00:00
(9/9): fuse3-libs-3.6.1-4.el7.x86_64.rpm                       |  82 kB  00:00:00
--------------------------------------------------------------------------------------
Total                                                     49 MB/s | 107 MB  00:02
Retrieving key from https://download.docker.com/linux/centos/gpg
Importing GPG key 0x621E9F35:
 Userid     : "Docker Release (CE rpm) "
 Fingerprint: 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
 From       : https://download.docker.com/linux/centos/gpg
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                 1/9
  Installing : containerd.io-1.4.4-3.1.el7.x86_64                                 2/9
  Installing : 1:docker-ce-cli-20.10.6-3.el7.x86_64                               3/9
  Installing : docker-scan-plugin-0.7.0-3.el7.x86_64                              4/9
  Installing : slirp4netns-0.4.3-4.el7_8.x86_64                                   5/9
  Installing : fuse3-libs-3.6.1-4.el7.x86_64                                      6/9
  Installing : fuse-overlayfs-0.7.2-6.el7_8.x86_64                                7/9
  Installing : 3:docker-ce-20.10.2-3.el7.x86_64                                   8/9
  Installing : docker-ce-rootless-extras-20.10.6-3.el7.x86_64                     9/9
  Verifying  : fuse3-libs-3.6.1-4.el7.x86_64                                      1/9
  Verifying  : 3:docker-ce-20.10.2-3.el7.x86_64                                   2/9
  Verifying  : docker-ce-rootless-extras-20.10.6-3.el7.x86_64                     3/9
  Verifying  : fuse-overlayfs-0.7.2-6.el7_8.x86_64                                4/9
  Verifying  : docker-scan-plugin-0.7.0-3.el7.x86_64                              5/9
  Verifying  : slirp4netns-0.4.3-4.el7_8.x86_64                                   6/9
  Verifying  : 2:container-selinux-2.119.2-1.911c772.el7_8.noarch                 7/9
  Verifying  : 1:docker-ce-cli-20.10.6-3.el7.x86_64                               8/9
  Verifying  : containerd.io-1.4.4-3.1.el7.x86_64                                 9/9

Installed:
  docker-ce.x86_64 3:20.10.2-3.el7

Dependency Installed:
  container-selinux.noarch 2:2.119.2-1.911c772.el7_8
  containerd.io.x86_64 0:1.4.4-3.1.el7
  docker-ce-cli.x86_64 1:20.10.6-3.el7
  docker-ce-rootless-extras.x86_64 0:20.10.6-3.el7
  docker-scan-plugin.x86_64 0:0.7.0-3.el7
  fuse-overlayfs.x86_64 0:0.7.2-6.el7_8
  fuse3-libs.x86_64 0:3.6.1-4.el7
  slirp4netns.x86_64 0:0.4.3-4.el7_8

Complete!
[root@asok-4-openstack yum.repos.d]# docker --version
Docker version 20.10.6, build 370c289
[root@asok-4-openstack yum.repos.d]#

...

ANSWER

Answered 2021-May-13 at 19:56

You did install docker-ce 20.10.2. The docker-ce-CLI is what is at 20.10.6.

Source https://stackoverflow.com/questions/67525415

QUESTION

Podman pod disappears after a few days, but process is still running and listening on a given port

Asked 2021-May-06 at 10:05

I am running an Elasticsearch container as Podman pod using podman play kube and a yaml definition of a pod. Pod is created, cluster of three nodes is created and everything works as expected. But: Podman pod dies after a few days of staying idle.

Podman podman ps command says:

...

ANSWER

Answered 2021-May-06 at 10:05

The workaround that worked for me is to add this configuration file from the Podman repository [1] under /usr/lib/tmpfiles.d/ and /etc/tmpfiles.d/, in this way we are preventing the removal of Podman temporary files from /tmp directory [2]. As stated in [3], additionally CNI leaves Network information in /var/lib/cni/networks when the system crashes or containers do not shut down properly. This behaviour has been fixed in the latest Podman release [4] and it happens when using rootless Podman.

Workaround

First, check the runRoot default directory set for your Podman rootless user:

Source https://stackoverflow.com/questions/66324225

QUESTION

Uninstalling Docker

Asked 2021-Feb-23 at 20:12

I installed Docker on my Unix machine and it was not working properly, so I tried to uninstall it to run through the steps again. I followed the uninstall steps here https://docs.docker.com/engine/install/ubuntu/#supported-storage-drivers

But I am receiving this error

...

ANSWER

Answered 2021-Feb-23 at 20:12

To fully uninstall docker follow below commands:

dpkg -l | grep -i docker
sudo apt-get purge -y docker-engine docker docker.io docker-ce docker-ce-cli
sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce

These commands will not remove the images, containers, volumes etc user created configuration files. So before deleting docker first delete these things. For deleting these things you can follow below commands:

docker rm -f (docker ps -a | awk '{print$1}'): To delete all the docker container available in your machine
docker rmi -f $(docker images -a -q): To delete all the images, but before this you should remove all the containers which are created from this images
docker rm -vf $(docker ps -a -q): To delete all containers including its volumes uses

Source https://stackoverflow.com/questions/66338203

QUESTION

How are the --network options available in podman?

Asked 2020-Sep-07 at 08:48

I am running a virtual environment on CentOS with podman. When I used the --net option of the podman run command, I get an error.

...

ANSWER

Answered 2020-Sep-07 at 08:48

The port_handler option requires Podman >= 2.1.0, which isn't released at this moment: https://github.com/containers/podman/commit/d86bae2a01cb855d5964a2a3fbdd41afe68d62c8

You can use that option if you compile Podman from its master branch.

Source https://stackoverflow.com/questions/63766341

QUESTION

podman MongoDB docker-entrypoint.sh permission denied

Asked 2020-Jul-22 at 05:53

I am new to docker and podman stuff. I want to run MongoDB in podman. So try to run it like this:-

...

ANSWER

Answered 2020-Jul-21 at 17:40

Before running. run by root and chmod -R 755 namefile

Source https://stackoverflow.com/questions/63017733

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install slirp4netns

Statically linked binaries available for x86_64, aarch64, armv7l, s390x, and ppc64le: https://github.com/rootless-containers/slirp4netns/releases.
RHEL/CentOS (since 7.7 and 8.0)
Fedora (since 28)
Arch Linux
openSUSE (since Leap 15.0)
SUSE Linux Enterprise (since 15)
Debian GNU/Linux (since 10.0)
Ubuntu (since 19.04)
NixOS
Gentoo Linux
Slackware
Void Linux
Alpine Linux (since 3.14)
libslirp needs to be v4.1.0 or later.
To build slirp4netns as a static binary, run ./configure with LDFLAGS=-static.
If you set --prefix to $HOME, you don't need to run make install with sudo.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

Find more information at: