Questions tagged [docker]
Docker is an application to create containers for applications.
1,100
questions
1
vote
1answer
7 views
PHP-FPM creating files as root when configured as www-data
In a multiple-container Docker application deployed with docker-compose I have a container built from alpine running PHP-FPM. That container is used both for providing PHP to the Nginx container, but ...
0
votes
1answer
36 views
Getting series of file conflicts like runc and containerd when trying to install docker on CentOS 8
I get what I believe is a file conflict error when I try to install docker/docker-ce on CentOS 8.
This is also a follow up from How to install docker on CentOS?
So here's what I do to get the error:
...
0
votes
0answers
5 views
X lock-ups with firefox running from docker
I need a separate browser instance that is configured to connect to a specific proxy that is used for accessing restricted network, but cannot be used for regular browsing, and also to keep the ...
1
vote
1answer
70 views
Failing to install Docker CE on RHEL 7 since tonight
I am using this commands to install Docker CE on RHEL7 and I am failing with the following:
This started tonight after working flawlessly for some time
sudo yum install -y yum-utils
sudo yum-config-...
0
votes
1answer
14 views
How to start Docker if address is already in use?
How can I start docker on Ubuntu 20.04, if it complains that address is already in use? I tried
docker-compose up -d
Starting relaatiotietokannat_db_1 ...
Starting relaatiotietokannat_db_1 ... error
...
0
votes
0answers
16 views
df and du average and send alert
I have nfs share which has mount point from all the container/pods as claim
NFS = 50GB and its used by container as
Java = 1gb -- mount point as java_data in container
postgres = 20GB -- mount ...
0
votes
1answer
14 views
Why docker exec command can launch shell with nologin user?
I have a nologin user for example foo in my /etc/passwd file:
foo:x:1010:1010::/home/foo:/usr/sbin/nologin
After I run this docker container, then I execute the command:
docker exec -it --user foo &...
1
vote
1answer
19 views
Why can't Wine run kernel-mode (ring 0) drivers in a container?
I'm not extremely familiar with systems programming or operating systems, so this is probably a stupid question. But I was trying to get a game running in Wine recently that implements an anti-cheat ...
0
votes
0answers
15 views
How can I setup Docker for web development?
On Ubuntu, how can I start docker for web development? I tried
docker-compose up
ERROR: Couldn't connect to Docker daemon - you might need to run `docker-machine start default`.
(base) jaakko@jaakko-...
0
votes
1answer
20 views
Will a Docker image built for Oracle Linux 7 run on Red Hat Linux 8
Can a Docker image built to run on Oracle Linux 7 be run on Red Hat Linux 8 (either under Docker or cri-o/podman)?
Is there some kind of verification and/or upgrade process that can be followed? Or ...
0
votes
1answer
56 views
How to get PID from within bash shell script
I have the following code that submits several subjobs withing a docker container:
#!/bin/bash
for file in "all files of a given type"; do
docker exec -itd "docker container"...
1
vote
0answers
22 views
Xauthority for python plotting in a docker container
I'm trying to understand how to run a docker container with an X11 server running in it so that I can do visualizations when I write some python code, and found lots of answers out there.
I found many ...
0
votes
0answers
24 views
systemd service stops after startup
My goal is to create a systemd service(foo) that runs a docker container. Before and after the ExecStart , I wanted to invoke a shell script which does some setup/cleanup. I need the cleanup to happen ...
1
vote
1answer
35 views
ssh fails with pam_systemd(sshd:session): Failed to create session: File exists
I have a situation where an outside ssh repeatedly (in a fast loop) connects to an OpenSSH daemon inside a Docker container that is based on Debian 10.5. Authorization is via an authorized key in $...
0
votes
0answers
18 views
dbus configuration in order to listen to requests from within a container
I am trying to set up an app that is capable to interact with the Bluetooth dbus interface (bluez.org). My goal is having the app to be capable to pair/connect a device. I am using the java library ...
1
vote
0answers
22 views
GitLab Coexisting with SSHD on Bridge Interface
Background
I am attempting to convert a server from using Docker to Podman. So far I have been able to convert all of my services (~15 in total) to systemd jobs and run them without issue. In doing ...
0
votes
0answers
39 views
LXC, Docker and iptables on the same host, timeout on port-forwarding from the container to the container
thanks for reading! I have a publicly exposed server (debian 10), used as an host, running both LXC (not LXD) and Docker.
These two container services are running with a mostly original configuration (...
23
votes
3answers
3k views
Is having docker installed a massive security hole?
Suppose I have an Ubuntu machine and did sudo apt install docker.io. Did I just put a huge security hole in my machine that will allow anyone with terminal access to escalate into root?
I ask that ...
3
votes
2answers
33 views
How to check if it's docker or host machine inside bash script?
I am writing a shell script for docker containers.
I want to check before running my script whether it's docker container or host machine.
something like this:
if $MACHINE=docker; then
echo proceed
...
0
votes
0answers
11 views
Restore empty docker-compose file
I was working on a sizeable docker-compose file using the nano editor. Upon saving it told me I was out of disk space. Without hesitating, I quit nano, extended my LVM and resized the FS as I have ...
1
vote
1answer
38 views
Failed to start Docker Container Engine
I did a docker installation on a Debian 10.
sudo apt -y install docker-ce docker-ce-cli containerd.io
when I want to start my Docker process I have this error message
systemd[1]: Starting Docker ...
0
votes
0answers
25 views
Why: “systemd not detected, dockerd daemon needs to be started manually”?
This question is similar to this one: systemd not detected, dockerd daemon needs to be started manually, as I have ran into the same problem
~$ curl -sSL https://get.docker.com/rootless | sh
# ...
0
votes
0answers
10 views
Best approach to create safe environment to install TensorRT
I would like to install TensorRT on a Linux machine with Ubuntu 18.04.4 to which I connect via ssh. I would like to create a virtual environment or similar to not mess with the machine. But as I am ...
0
votes
0answers
22 views
Docker Ubuntu communication
What's the hostname or ip address to use inside a flask container to communicate with mongodb in Ubuntu host ?? host.docker.internal work for Mac and windows smoothly... What about linux Ubuntu
0
votes
0answers
18 views
how to change the speed of veth-pair interface
I connect many docker containers by veth-pair. how can I change the speed of the veth-pair interface speed? Help!!!
I tried ethtool -s interface_name speed ***, but it not support. maybe because of ...
0
votes
1answer
56 views
Do docker container cause slow Disk/OS performance
We have 3 servers, each of which are running RHEL 7.6. Each machine has 64G of RAM and 15 CPUs.
We are preparing to install a set of services --- kafka, zookeeper, schema registry --- on all of the ...
2
votes
1answer
39 views
Connect to VNC server inside a docker / podman container with Login screen
We're currently trying to get a Ubuntu 18.04 instance up and running inside a podman container. Our goal is to be able to connect to the linux system inside the container via VNC, we're trying to make ...
1
vote
1answer
604 views
How to install docker on CentOS?
Having some trouble installing docker:
[root@rolly ~]#
[root@rolly ~]# sudo yum install -y yum-utils
Docker CE Stable - x86_64 ...
0
votes
1answer
78 views
How to run GUI application in Docker?
I am trying to install Packet Tracer in my Parrot OS docker container following this tutorial, and my Dockerfile looks like this for now (just to test):
FROM parrotsec/core
COPY PacketTracer_731_amd64....
1
vote
2answers
60 views
Fail to install tcpdump package in UBI8 (Red Hat Universal Base Image)
I am building a docker image based on UBI8(Red Hat Universal Base Image), Dockerfile looks like
FROM registry.access.redhat.com/ubi8/ubi-minimal
RUN microdnf install sudo zip tar bash procps openssl ...
0
votes
0answers
47 views
Are there alternative/unofficial browsable package repositories for Amazon Linux 2
In the amozonlinux:2 docker image I've tried the following to figure out what are the package repositories
sh-4.2# yum repoinfo
Loaded plugins: ovl, priorities
Repo-id : amzn2-core/2/x86_64
Repo-...
1
vote
1answer
36 views
Restart Docker Network after Resuming VM
Whenever I suspend/resume my VMs the docker networking fails to function (e.g. timeouts between containers and the host, etc.). I'm using docker in the VM, the VM is not controlled by docker.
This ...
0
votes
0answers
65 views
Runnig gui inside docker using vncserver in browser
I am stuck on command that launcnes gui application inside docker. However i am able to reach vnc server, open terminal an launch the application, I would like it to open as i open novnc server in ...
4
votes
1answer
33 views
Content of /etc/network in Alpine Linux image
I have an Alpine Linux image installed on a docker container. I was exploring it, and doing ls -lR /etc/network I had this result:
/etc/network/:
total 24
drwxr-xr-x 2 root root 4096 ...
1
vote
1answer
89 views
trying to install mysql 5.7 in a docker image in ubuntu machine
When trying to install mysql 5.7 in docker container, I am getting the following error. I am new to docker and containers.
Step 16/23 : RUN apt-get install mysql-server-5.7
---> Running in ...
0
votes
1answer
54 views
Linux alpine check musl version
We have docker files which based on alpine linux.
I want for the built container to check the version of the musl library ,
I mean run the container and and in RT check the musl version
how can I do ...
1
vote
0answers
36 views
Proxy tomcat with haproxy
I am trying to proxy tomcat with haproxy. Tomcat and haproxy are dockerized inside containers gis-web & web-gateway (both are added to docker bridge network)
I added sample.war app to webapps ...
0
votes
1answer
35 views
Emulate /proc folder
I've a software that uses a few nasty algorithms to determine, wether it runs in a docker container or not. One example is, that it scans /proc/1/cgroup for non root paths (i.e. /docker/SOME-UUID ...
0
votes
1answer
43 views
How to bring sleeping process back to foreground?
I used ssh to connect to a server, and run a process in docker.
docker exec -ti docker_name /bin/bash
However, the ssh connection broke at some point, when I went back, command top shows
PID USER ...
1
vote
1answer
30 views
disk quota exceeded when trying to deploy Docker container inside LXC
I have an LXC container running docker. Many containers are running successfully but I am unable to add more; I am trying to deploy a new docker container and getting the following error:
container ...
0
votes
1answer
15 views
Can the shell on my host (with my customizations) work with a docker instance?
Normally if you connect to a docker instance via docker exec you land into something quite primitive like sh or ash.
If you want something better, you have to install it yourself on the docker ...
1
vote
1answer
152 views
kdevtmpfsi process is using 100% CPU, restarting on kill
I have amzon linux instance with docker, rabbitmq and ejabberd installed.
One process is starting and using cpu 100% I'm trying to kill that process but after sometimes it is starting
Top command ...
0
votes
0answers
59 views
How to map my host's to the container's user in docker-compose using the lebokus/docker-volume-bindfs plugin?
I have a php dev stack setup through Dockerfiles and docker-compose. I mount the source tree and composer vendor folder to the container. My host's local user philipp has id 1000 and my container uses ...
0
votes
1answer
177 views
Starting systemd and using Docker RUN?
Docker provides for the ability to run a command when the container starts. This is specified with CMD in the Dockerfile.
However, if I want my container to start with systemd I have to use,
CMD [&...
1
vote
0answers
26 views
forward traffic from a physical interface to docker 0 -> to docker container eth0
I have an Ubuntu 16.04 desktop with 2 interface cards. I am trying to route traffic from Windows machine to Ubuntu machine's enp6s0 interface. I have connected the Windows machine and Ubuntu 16.04 ...
0
votes
0answers
104 views
Connecting to docker bridged container on CentOS 7 gives: Connection reset by peer
As the title says I have a docker image which runs fine on my development machine in docker using network bridged to an another port (-p 8080:5000). But as soon as I am deploying this on my server ...
0
votes
1answer
49 views
How can I access the web console of CodeReady Containers, installed on CentOS Docker container, from Host machine?
I have this scenario:
a HOST machine running Debian that runs docker containers.
a CentOS docker container that have CodeReady Containers (CRC) installed on itself. CRC working on the container, via ...
1
vote
1answer
50 views
How can I redirect traffic to an Host machine port from a VM inside in a CentOS Docker container?
I have this scenario:
a HOST machine running Debian with ufw installed.
a CentOS docker container that have an VM that working on an specific IP.
This VM have an app working on the container calling ...
0
votes
2answers
93 views
In Debian 10 how to verify that an apt-get package doesn't contains any viruses or any malicious code [closed]
The below Dockerfile is written based on Debian 10 (buster) image
FROM node:12-buster
RUN apt-get update -y
RUN apt-get install wkhtmltopdf -y
#...rest content
As you see above I need to install a ...
0
votes
0answers
14 views
How can I find out what experimental syntaxes my current version of Docker supports?
When I run an experimental syntax I get the following
Error response from daemon: Dockerfile parse error line 13: Unknown flag: security
When I run with DOCKER_BUILDKIT=1 I get,
I get,
[+] Building ...
