Questions tagged [containers]
Use for generic questions on containers that do not fall under a specific container technology, like Docker, LXC, FreeBSD Jails, OpenBSD sysjails, Solaris Containers, WPARs, etc. Also use where the specific technology is not relevant to the question.
119
questions
1
vote
0answers
23 views
Can't install Docker Engine On Windows Server 2019 in an Air Gapped network
The organization I work for has a tightly air-gapped network.
I need to be able to run my applications in docker containers, so I need to install Docker Engine on Windows Server 2019.
I have followed ...
1
vote
3answers
28 views
Can I run a Ubuntu 16 Docker image on a Ubuntu 18 host? Will I need to install hardware drivers already available to the host?
We have some Docker images built from Ubuntu 16.04 base image, and we've been running them on hosts running Ubuntu 16.04; these hosts are laptop computers from different makes. However, we have had ...
0
votes
1answer
17 views
Should my zombie backend container be restarted when database is down?
I have a situation where I have a Postgres and a Node server which connects to it. I am using Kubernetes to deploy them.
If my Postgres container fails and stops working then its livenessProbe will ...
1
vote
0answers
18 views
How to get parent Docker container ID in docker-in-docker-context?
While running a Docker container inside another Docker container, how to get parent container's ID?
0
votes
1answer
34 views
What is the difference between a jail environment in linux and docker container?
I am curious about difference between a jail environment in linux and Docker. What separates these two technologies?
1
vote
1answer
18 views
Auto-managed docker-compose volume not shared among containers
I have a bit of hard time understanding the way docker-compose handles auto-managed volumes. Here is an example docker-compose.yml
version: '3.7'
services:
one:
image: alpine
command: sh -c ...
1
vote
4answers
85 views
Why will my container run in Docker, but will not run in Kubernetes?
Background
I have a container that I have defined with an CMD and an ENTRYPOINT in Docker. When I run the following command my container runs with no issues whatsoever.
docker run --rm -ti custom-...
0
votes
1answer
26 views
How to pass parameters to a container orchestrated by Kubernetes similar to running the container at the command line using the docker run command?
Background
I have a docker container that I run in the following fashion:
docker run --rm my-custom-container:latest --username me --password yes --url "https://my.url"
The container does what ...
0
votes
1answer
110 views
Can't make MySQL 5.7 work with Docker Compose, no matter what
I'm configuring a docker compose file, and the first step is to configure the MySQL service (so I can further use in my app service), but no matter what, I cannot enter MySQL within the container, ...
1
vote
2answers
373 views
docker | database connection refused between two containers
I have a mysql database running with the following docker-compose.yml:
version: '3.3'
services:
db:
image: mysql:5.7
restart: always
environment:
...
0
votes
0answers
26 views
percona xtradb node restarting failure
I have recently installed Percona XtraDB Cluster in a Docker Container following this guide [https://www.percona.com/doc/percona-xtradb-cluster/LATEST/install/docker.html][1]
But after bootstrapping ...
0
votes
1answer
37 views
Azure Windows Container: How to read secrets from an azure vault
I am coming from AWS / Linux and try this in Azure / Windows, now.
The Question:
I have a windows container in Azure and want it to get some secrets from an Azure Vault. How can I do that?
This is ...
0
votes
0answers
24 views
Bind Docker Volume append-only
Is there any possible way to mount an volume (or file of volume) in docker as append only?
chattr +a <filename> seems to be ignored by docker containers
(--cap-add LINUX_IMMUTABLE to make it ...
1
vote
1answer
23 views
How to develop a docker container for laravel without laradock or docker-compose
I am very new to docker. I want to build a laravel development environment with docker. I already tried laradock but it seemed complicated for me. I was wondering whether it is possible to create a ...
1
vote
1answer
158 views
ERROR: Unable to read database state: No such file or directory
I was trying to install Photon by pulling the docker image. But when I run docker build -t photon . I am getting the below error.
---> Running in 3076fb42ef8b
ERROR: Unable to read database state:...
0
votes
2answers
28 views
Configure Kubernetes with docker container on Ubuntu VM
I am using the YAML file to deploy the container on Kubernetes with some replication factor on a hosted machine.
YAML File
apiVersion: apps/v1
kind: Deployment
metadata:
name: mojo-deployment
...
2
votes
3answers
72 views
How to get the next friendly name that Docker will assign to the container it will make?
Background
When you start a Docker container as in the following example:
$ docker run -ti ubuntu:latest
Docker docker automatically assigns the container an ID and a friendly name.
Docker ...
2
votes
1answer
42 views
What's the relationship between ContainerD and Docker?
I'm aware that Kubernetes uses containerd internally and that containerd is part of Docker. Does that mean that Kubernetes only uses certain parts of Docker to provide orchestration of containers? ...
1
vote
1answer
30 views
Are there examples of other production grade container runtimes?
While we say "Docker is just one possible container runtime", are there other implementations used in production environments as of late 2019, and do they have different approaches? (while Docker ...
3
votes
1answer
114 views
What are the best practices for anti-virus / anti-malware when using containers?
One of the SOC 2 controls is apparently around ensuring antivirus/anti-spam/anti-malware is running on production servers. I've been googling to see if there are any recommendation/best practices for ...
3
votes
3answers
202 views
Does every docker container has a a OS?
Does every container have an OS?
For example, the base docker python image
has a default OS in it? I couldn't find any info on Google.
I am in doubt because there are some images made with Python ...
2
votes
1answer
37 views
Container for every user
Please help me here based on your experiences.
We have launched a desktop application where users can download all their online data from several platforms at one place. Our motto is to provide users ...
1
vote
1answer
399 views
Docker container stuck in “new” state - Docker swarm - service stack
I am deploying a service stack to a Docker swarm like so:
$ dt stack deploy --with-registry-auth -c tmp.stack.docker-compose.yml tmp
Creating network tmp_my-network
Creating service tmp_my-service
$ ...
1
vote
1answer
480 views
jenkins stuck “Please wait while Jenkins is getting ready to work”
I've been trying to get a simple jenkins master node to start but it keeps getting stuck at the "Please wait while Jenkins is getting ready to work".
My setup is nothing exotic:
jenkins is installed ...
1
vote
1answer
50 views
Container runtime Vs orchestrator
The terms container runtime and orchestrator always confuse me. Can someone please put these in simple terms?
Thanks
0
votes
1answer
57 views
What is the performance different running docker on Windows versus Linux?
We are looking at containerizing some of our applications and servers, Redhat servers to be more specific and there is an idea to run Docker on windows instead of Linux so the end user has an easier ...
2
votes
1answer
372 views
Accessing TPM from inside a Docker Container
I want to implement Vault as part of the DevOps build pipeline to store all the secrets like passwords and certificates. I understand that Vault keeps the data encrypted but I have been asked me to ...
0
votes
1answer
125 views
How to get into an App Container Manually with Garden-RunC Backend?
So I have been trying this-tutorial to access the runC container from the diego-cell VM. However, when I try to run
/var/vcap/packages/runc/bin/runc exec -t <instance_id> /bin/bash
I get the ...
1
vote
2answers
95 views
Why is docker container recreated
I'm testing Wordpress docker on an Amazon EC2 machine.
yesterday, all file based changes (like plugins, themes, etc) were gone. The Ec2 machine is up for 8 days, other containers are also up for 8 ...
0
votes
1answer
29 views
How to scale the control plane of a service mesh?
Scalability in the data plane is easy to achieve by simply having more replicas. The configuration the proxies receive from the control plane makes that possible . However, if the number of services (...
6
votes
1answer
56 views
How do you monitor and alert on thrashing containers?
Are there any proposed best practices for how to monitor for thrashing containers? We're in a situation where we have containers that might try to come up and will crash -> restart a few dozen times ...
3
votes
2answers
88 views
What are Deis Workflow Alternatives?
We're looking to build an internal Heroku-like PaaS that supports clustering and a DFS. We found Deis Workflow that seems to do exactly what we're looking for, but the project has since been ...
1
vote
2answers
3k views
helm - cannot get resource “namespaces” in API group
I installed Kubernetes, helm on the Ubuntu 16.04.6 Box, I want to deploy kubernetes-dashboard using helm but getting below error while installing it
$ helm install stable/kubernetes-dashboard --name ...
0
votes
1answer
33 views
How do I create a Docker container which just waits to be shelled into?
I'm testing a Docker container for development. And at the moment I just want to provision it with some libraries. After which I want to connect to it and test that I have all the libraries I need.
...
1
vote
1answer
509 views
What is the difference between dockerd and com.docker.service in Docker for Windows?
What is the difference between dockerd and com.docker.service in Docker for Windows? Or rather I should ask: why do I need (if I need) com.docker.service running?
Intention: I want to use Docker only ...
2
votes
2answers
26 views
How can I test native macOS UI software in a container before deployment?
As part of the CI setup, I'd like to run (automated) tests on native macOS GUI software in a 'safe environment' (i.e. without messing with the host software installation too much). Virtual machines (...
0
votes
2answers
540 views
What is the cheapest way to get CI for a Qt project?
To build up my portfolio I'm writing an application to showcase all the best practices I'm aware of, including unit tests and continuous integration.
The project was originally started in C++, and I ...
4
votes
1answer
301 views
Process auditing in containers
I've read numerous articles on this going back to 2013, but what I wasn't able to ascertain is whether a reliable method has yet been devised for auditing processes inside a container. This question ...
1
vote
3answers
478 views
How to stop a container dying at the end of an execution?
I'm running git-all-secrets over our organisation to ensure we have nothing exposed. I'm doing this using:
sudo docker run --rm -it abhartiya/tools_gitallsecrets -org <org> -output /root/output....
0
votes
1answer
321 views
How to build windows image on azure dev ops hosted agent
The host agent pool on azure-devops to build windows container, Hosted Windows Container is running Windows Server version 1803.
But I want to deploy on Windows Server 2019, so instead of using ...
0
votes
1answer
25 views
Is “running several Linux distributions on the same host” a good justification for container adoption?
I need to justify container adoption.
I have several solid arguments, but one is making me dubious. Is it correct to say software can "run better" or "worst" depending on the Linux distribution? Here ...
6
votes
0answers
43 views
Blackbox testing vs openbox testing applications in a containerized environment [closed]
We use containers to deploy our Node.js applications. But currently, the development and a good share of testing is done by the developers on their own host system and thus using different versions of ...
0
votes
2answers
49 views
Is there a good standard to follow when choosing a service mesh for your microservice application?
The industry appears to have chosen the de facto standards for containers (docker) and orchestration (kubernetes) but this doesn't appear to be the case for the options for implementing a service mesh....
5
votes
2answers
184 views
If we are using containers do we still need to worry about configuration management at an infrastructure level?
We are about to begin our journey with containers and I am wondering if we still need to utilize something like Chef, Ansible, Terraform, etc. to ensure that our infrastructure is properly maintained? ...
1
vote
0answers
42 views
How to automate a work-flow in the cloud? [closed]
I'm currently trying to scale a crawler in the cloud.
I'm wondering what would be the best way to automate the work-flow, considering the following conditions:
- Guaranteed bandwidth, CPU and memory ...
0
votes
1answer
82 views
container on same network with host
Our application is a combination of 4 different applications. The graphics part is running on a host and other 3 applications are running on 3 different VMs. Which uses bridge networking.
eg. ...
3
votes
1answer
56 views
Docker Persisting Data During Build
I am trying to create a custom container which also contains MongoDB (hence not using the official MongoDB container). I am trying to add authentication to the database, and I think I am having an ...
1
vote
0answers
231 views
running httpd and nginx in the same pod kubernetes [closed]
I am not able to run both apache (httpd) and nginx in the same pod. Indeed both containers are running on port 80.
# kubectl logs -f multi-container -c apache
(98)Address in use: AH00072: make_sock: ...
1
vote
2answers
70 views
How does Docker container orchestration work?
I am familiarizing with the architecture and practices to package, build and deploy software or unless, small pieces of software.
If suddenly I am mixing concepts with specific tools (sometimes is ...
0
votes
3answers
128 views
How to get exposed ports from inside of container?
I want to know which port(s) are exposed when user run the image.
docker run -p 1000:1234 myimagename
I want to get 1234 value in container since I will use it for some configurations(IIS bindings ...
