Questions tagged [docker]
Docker is an application to create containers for applications.
1,477
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Can't change bridge subnet or create network on Docker
I would like to build a small infrastructure entirely under Linux. For the LDAP and file server part I would like to set up a Docker server that will host the OpenLDAP and Owncloud containers. I would ...
- 59
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vote
1
answer
6
views
Running a docker command in a user-service
I am migrating some apps on my home service to docker. There are several background jobs, running as user-service, using these apps.
But I receive the following error
Got permission denied while ...
- 111
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12
views
Route traffic through static route instead of default gateway for docker services
In my linux based server, default-gateway is set as
ip default-gateway 10.77.122.1
and static route is set as
ip route 0.0.0.0 0.0.0.0 gateway 10.106.142.1
I have a java based app which is ...
- 101
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8
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Deploying Virtual Machines on-demand HPC
My university has an HPC, which is currently in a usable state, but the dependencies and libraries are a mess. In the event that we reset the hardware and start from scratch, I want users across the ...
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votes
1
answer
57
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Variable is always empty regardless of the loop technique I use
I have a file called dependencies and its content is:
blog
forms
geo
ticketing
And I have this build.sh script in which I need to loop over them. This build script would be run inside a docker ...
- 415
-2
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20
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I cant update idk wy after i installed docker
pt update
Ign:2 https://download.docker.com/linux/debian kali-rolling InRelease
Hit:1 http://kali.download/kali kali-rolling InRelease
Err:3 https://download.docker.com/linux/debian kali-rolling ...
2
votes
1
answer
33
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Can you add docker repository to apt-cacher-ng?
My debian 11 server1 doesn't have internet access and it installs cached debian packages from another server2 that has apt-cacher-ng installed. The sources.list file in server1 points to apt-cacher-...
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2
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16
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docker exposed port not accessible from outside even when port is opened using iptables command
I have a sample docker tar image in my linux based server and ran that though docker run command as below where 9521f101839f is image id.
docker run -p 0.0.0.0:9895:9898 -td 9521f101839f
So now ...
- 101
1
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1
answer
25
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why the result of `yum deplist` and `yum install --downloadonly` is different?
When I run this:
yum install -y --downloadonly --downloaddir=xxx docker-ce,
then I got those rpm files:
container-selinux-2.188.0-1.module+an8.6.0+10825+318933f1.noarch.rpm
docker-ce-20.10.18-3.el8....
- 13
0
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1
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37
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how to enable ssh from container to Linux remote machine
we try to perform ssh / scp from docker container to remote LINUX redhat machine
ssh remote_server
echo $?
255
ssh -vvv remote_server
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017
debug1: Reading ...
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6
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syslinux bootloader unable to find the initrd.img for a custom bootable image made via Docker Containers
Description
As a side project, I am trying to use Hashicorp Packer along with Docker to create Bootable disk Images from Docker Containers.
Hashicorp Packer generally takes the responsibility of ...
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1
answer
15
views
How to install Pipe Viewer (pv) via microdnf on oraclelinux:8-slim?
Docker mysql:8 and latest change OS from Debian to oraclelinux:8-slim. There is a microdnf. So I'm looking for solution to install pv package.
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21
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Debian Permissions denied in docker volumes for external HD
Docker in Raspberry PI 4 with external HD (NTFS type) connected. There are some docker containers running with volumes mapped to the external HD such a:
- /media/myExternalHD/docker_config/app1:/...
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17
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ubuntu GUI on Docker
i am new to docker I'm using it because i have a project with some dependencies and i need to speed up the process of running the code on another machine.
my python code will run about 3 commands :
...
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17
views
Identify docker directory /var/lib/docker/containers/$ID/
I need to know which docker (running or not) is associated to the big directory /var/lib/docker/containers/$ID/ :
$ id=d28ebf088353dd7135488f447df2a2be6f7bc84df44298bc1a869a78d8a943f2
$ du -sh /var/...
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1
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25
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No route to host when deploying apache2 config to httpd service?
I have a strange issue: so far I was using apache2 as proxy server (as docker container), 80 and 443 works without problems.
Now I'm trying to migrate to httpd container (v.2.4.54). But as soon as I ...
- 329
3
votes
1
answer
64
views
How to figure out which package manager to use within docker image
I'm trying to write a Dockerfile and need to install wget in the docker image. I'm never sure how to figure out which distro a base image uses though, or which package manager is used. An example ...
- 133
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answers
45
views
Merge /home partition to partition mounted at /
My current situation is the one shown below:
What I want to do is to remove /home partition and have it as a directory in the file system mounted at /
I consulted this in order to do so but in my ...
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15
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How to build custom containers for paaas services like heroku without docker
I want to build a paas service like heroku,
but i have difficulty running the client application,
Is the client app running using chroot? /fakrechroot/other?
Sorry, I've tried to search on Google but ...
- 13
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0
answers
12
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IPTables rules to access SERVER B (Docker container) through Host A with port forwarding
Thanks for reading my question :)
I am trying to send HTTPS request from a Client (C) to a server (B) that is within a Docker container on a host A.
C is connected to A through a WIFI connection (A is ...
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53
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New docker install internet connection issues on Arch with AMD CPU
I have a new computer build which I've installed Arch Linux on. Everything else seems to work correctly as far as I can tell. Though my new docker install using pacman does not seem to set it's ...
- 237
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80
views
Consistently losing connection to deb.debian.org over HTTP during apt-get install
I have a weird recurring issue. I'm using Docker to run a Ruby container on Mac OS. The Dockerfile is pretty normal:
FROM ruby:2.7.6-slim
RUN apt-get update -qq && \
apt-get install -y git ...
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0
answers
15
views
What is the cni.lock file for?
What does the $HOME/.config/cni/net.d/cni.lock file do for (rootless) podman? (I've read cni.lock exists in Docker too, so I've tagged this post Docker as well.) I can control where the container's ...
2
votes
1
answer
72
views
Why does mounting this ext4 image fail?
I'm learning about Linux filesystems, and am trying to follow instructions how to create a ext4 image, mount it to a directory, and run debootstrap in that mounted directory.
Step 1 of my instructions ...
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1
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1
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29
views
Why is my namespace not detected?
I tried form home,then sudo su -
ip netns exec 5bd337503b01 ip addr show
Cannot open network namespace "5bd337503b01": No such file or directory
pwd shows
/var/run/docker/netns
Why?
- 275
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votes
1
answer
59
views
How to route traffic from a wifi AP via a docker container on a Raspberry Pi
I have a container A running a VPN client, then I traffic other containers' (B and C) traffic via container A.
Is there a way to create a container D, which internally is running something like HostAP ...
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1
answer
59
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How to force Docker to run my script using bash, and not sh
This is my script:
#!/bin/bash
# some bash code here
And this is my Dockerfile:
FROM node:lts-bullseye-slim
COPY . .
RUN /Script.sh
And here's the error I get:
Step 5/5 : RUN /Script.sh
---> ...
- 415
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64
views
docker login stopped working
I was playing around with docker & docker-desktop last week. I successfully did a (cmdline) docker login to our gitlab registry using an accesstoken I created and managed to pull some of our ...
- 123
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0
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72
views
Device "ip_tables" does not exist on Alpine Linux
I'm trying to run a docker-in-docker (dind) (more specifically, docker:22.06.0-beta.0-dind-rootless) image on a Alpine Linux host, that is running inside VirtualBox, whenever the container starts up, ...
- 689
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27
views
NFS mounting between three machines
Struggling to understand a concept - how to properly mount nfs between 3 devices in Docker
device A : /srv/nfs * bare-metal nfs server
device B (docker/nfs client): - mount -t nfs /srv/nfs /mntB/dataB;...
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51
views
Creating docker image of my system in its current state
I want to create a docker image of my own system in its current state. Here, i found a method that uses the debootstrap tool to create an image:
$ sudo debootstrap focal focal > /dev/null
$ sudo ...
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0
answers
29
views
Docker service restart overwrites host's resolv.conf
I have a namserver configured in my /etc/resolv.conf in ubuntu 18 to resolve dns urls on the vpc. Whenever I do a sudo systemctl restart docker, the host's resolve.conf gets overwritten and my ...
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1
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56
views
Passing printer inside docker
I am trying to create a docker image with cups to handle my printer.
When I do this in my docker compose, cups recognizes the printer and I can add it.
On the host:
$ lsusb
Bus 001 Device 008: ID 04a9:...
1
vote
1
answer
40
views
Connecting to WIFIonICE fails because a secondary connection of the base connection failed
I am travelling with Deutsche Bahn. I use a Debian Testing with Docker installed. I am aware of the necessary workarounds, e.g. described here or here, and applied them.
Unfortunately connecting to ...
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5
views
Elasticsearch in Docker max file descriptors issue
I'm trying to run a container from a custom Docker image of Elasticsearch. It's crashing with a
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
How ...
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0
answers
23
views
psql asks for a password when username in host and postgres server are identical?
I have a postgres server running in a docker container. I added a user there named "myuser". I also have a linux user named "myuser".
Then (as root) I do:
$ su - myser
$ psql
...
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0
answers
13
views
Why does my Backup Cronjob not work? [duplicate]
I am currently trying to Backup my persistant Docker data once a week.
But somehow my cronjob wont work. Cron has no problem with other jobs. Just with this one and i dont understand why.
I edited the ...
1
vote
1
answer
39
views
Podman Ps Format help
I am trying to list podman ps in a very readable format using podman ps -a --format="ID\t{{.ID}}\nNAME\t{{.Names}}\nIMAGE\t{{.Image}}\nPORTS\t{{.Ports}}\nCOMMAND\t{{.Command}}\nCREATED\t{{....
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227
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What does it means when the docker daemon failed to add an interface to sandbox?
I am running several docker containers and decided to reorganize them (split the configurations into folders gathering dependent services instead of having one big heap). Everything was going fine ...
- 1,358
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2
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632
views
How to install specific version of python on Alpine linux
I am using docker's official docker image and want to install python3.9.6
Running this installs python 3.10.x
apk add --update --no-cache python3 && ln -sf python3 /usr/bin/python
and I can't ...
- 101
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1
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80
views
Installed package docker-compose-plugin but can only start it from /usr/libexec/docker/cli-plugins/docker-compose [solved]
I installed docker-compose through
$ sudo apt-get install docker-compose-plugin
and as I see by the output of dpkg -L docker-compose-plugin:
/.
/usr
/usr/libexec
/usr/libexec/docker
/usr/libexec/...
- 323
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0
answers
44
views
Problem with installing Docker and docker-compose (Kubuntu 20.04) Installation errors
I had a broken docker and docker-compose installation so I tried to remove it as clean as possible in order to undertake a new, clean, installation.
Look my previous thread
So I followed these guides ...
- 323
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votes
1
answer
59
views
Docker Ubuntu container on Debian host with custom CUDA/cuDNN
I have access to Debian 11 server, where some arbitrary NVIDIA driver and CUDA versions are installed. However, since many people use the server, different versions of CUDA and cuDNN are required by ...
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76
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Docker on Debian Failing to Bind to Port 80
I am running Docker on Debian 11. I deploy an Nginx container and it fails to bind to port 80 even though port 80 is not in use by any other process. I even tried running Docker as root.
Here's the ...
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0
answers
41
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How do I correctly uninstall a broken installation of Docker and how to reinstall it? (which packages are needed/which not)
how do I uninstall a broken Docker installation absolutely clean such that I can start a proper re-installation?
OS is Kubuntu 20.04
Obviously I had at least some components (docker swarm) installed ...
- 323
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17
views
mdadm stop ramains device file in privileged container
I am testing s/w raid in container environment.
Issue is that garbage files of mdadm remain in host when I stopped raid device in privileged container.
Below is creating s/w raid with two NVMe-oF ...
1
vote
1
answer
53
views
ufw blocks communication between docker containers
I have setup two docker containers for a Magento instance and a redis instance. For now, I only want to allow certain IP addresses to access the website, so I enabled ufw and added some entries.
The ...
- 570
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votes
1
answer
48
views
Chown breaks in bound volumes with Docker user namespace remapping: "Operation not permitted"
I followed the instructions here for enabling user namespace remapping.
However, now inside of a container I can no longer change the ownership of a -v bounded volume.
I'm using Docker on Fedora with ...
- 101
0
votes
0
answers
102
views
Docker overlay folder with host folder
My situation is the following:
I am having a docker image/container in which I am compiling. I had to install some components to $HOME via the Dockerfile (so while creating the image).
Let's say one ...
- 181
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0
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77
views
Redirect cron to docker stderr and stdout as well as file
I have this crontab within a Docker container, with the Dockerfile command being CMD ["cron", "-f"]
* * * * * python /code/etl.py > /proc/1/fd/1 2> /proc/1/fd/2
This is ...
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