Questions tagged [linux]
Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel. Use this tag for questions about DevOps practices, processes and tools in Linux environments.
140
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Anyone know of a completely fanless & portless edge computer? [migrated]
Looking for a rugged edge computer with absolutely zero ports, including power and solid state (only SSDs, etc). For example, it could be magnetically charged with a battery in the case & use ...
- 101
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1
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79
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show running docker containers nicely formatted
Default layout of output from docker ps is somewhat unwieldy ... how to get a better presentation of all locally running docker containers from terminal on linux ?
For context below is output from ...
- 479
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1
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576
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Ansible Unsupported Parameters for using handler
I'm trying to run a ansible task but I keep getting an error.
This is the play I want to run:
- name: use of handlers
hosts: all
tasks:
- name: install packages
yum:
name: httpd
...
- 11
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0
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219
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Logstash error: open /usr/share/logstash/config/logstash.yml: permission denied
I have a logging repo that contains filebeat, logstash, elasticsearch, kibana and a setup file, it is running normally on different servers using dockers, but now i am trying to build it on a new ...
- 1
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1
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49
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How to make a CI/CD of an ASP.net core app to Linux compute engine instance
I'm using Google cloud, I have a linux VM up and ready for use, I have an ASP.net core web app on Azure devops. I have configured the build pipeline for this webapp, now I want to automate its ...
- 101
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28
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Gitlab-ci: Unable to read file deb: unsupported tar compression in deb: control.tar.zst
I am new to gitlab-ci and learning it. I am trying to push my deb package on remote server. I am able to do it when I am running individual commands mentioned in gitlab-ci.yml manually in ubunty/...
- 1
1
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0
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25
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Implementing the right conditions for a yum command for centos5 in Ansible
I'm currently working with a centos5 host and I have to install some packages with yum.
Unfortunately, as far as I know, centos5 doesn't support Ansible's yum module, since it requires python2 ...
- 11
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180
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What are some secure ways to run chown and chmod in a Gitlab Deployment script?
I'm working on a deployment script using GitLab that deploys some code to a Linux based server. I have a stage of deployment that needs to lock down permissions. What's the best approach for ...
2
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20
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Linux Cloud/Windows On Prem Deployments
I have sort of a unique problem where I have a cloud deployment (linux) that needs to be ported to an on-premise deployment (windows).
The constraint is that this is medical software and hospitals ...
- 121
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1
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208
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Why does stripping executables in Docker add ridiculous layer memory overhead?
On this image, I ran the following command to reduce executable sizes:
find -P -O3 /usr/bin/ /usr/local/bin -type f -not -name strip -and -not -name dbus-daemon -execdir strip -v --strip-unneeded '{}' ...
- 160
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450
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Does docker engine (not Desktop) support Linux containers on Windows 11?
I've installed docker engine according to the following instructions: https://docs.docker.com/engine/install/binaries/#install-server-and-client-binaries-on-windows
I'm trying to run Linux containers ...
- 141
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216
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Gitlab - having both Docker-in-Docker and npm during build stage
I'm building a nodejs app and need npm. On the other hand, I need Docker-in-Docker for building the image. I need both of them at the same time.
No image contains both npm and dind, there is a ...
0
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0
answers
9
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Centrally controlling the versions of linux cli applications on AWS instances by tag value
Say we have 20 EC2 instances all tagged in a specific way.
'application-name = jenkins' 'owner = squad1' etc.
On these instances we have various common applications installed, like say Hashicorp ...
- 159
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107
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Accessing Pelias Geocoder docker compose from other machine
Following this tutorial, I have a docker image running in a Linux machine, with the Pelias Geocoder service: https://github.com/pelias/docker
I can access the service from the localhost, in a browser, ...
1
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2
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996
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Rebooting node at end of Jenkins pipeline
I have a pipeline that runs on a dedicated bare metal node for automated performance benchmarking. Using bare metal is necessary due to the nature of the project.
Near the end of the pipeline, the ...
- 111
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2k
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nginx in Docker - returns "server" directive is not allowed here
I have dockerized an Angular application with the following Dockerfile and nginx.conf. The container works fine in Docker desktop. When deploying in Kubernetes cluster, the container fails to start ...
- 101
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1
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291
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Can't run apt-get update in an Ubuntu 16.04 docker container
Everytime I run apt-get update -y in my Ubuntu 16.04 docker container, I get the following error:
Hit:1 http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit:2 http://archive.ubuntu.com/...
2
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1
answer
138
views
Docker performance when running on LVM
It seems that when using overlay2 storage driver, docker is much slower when using a LVM compared to without a LVM (ext4 filesystem in both cases, same machine).
Questions:
Is this intended/expected?
...
- 23
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1
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127
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Terraform wanting to redeploy azure vms for 'no' reason
I got a VM defined in terraform like this:
resource "azurerm_linux_virtual_machine" "vm" {
name = var.vm-name
resource_group_name = var....
- 1
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1
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201
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Where is located mysqldump log file on Linux/Ubuntu
I am neither a DB administrator, nor a DevOps but I need to migrate a very large table (~500M rows) from one MySQL schema to another. For doing so, I use mysqldumpbackup tool. Also, since the DB is an ...
- 71
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1
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2k
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docker-credential-desktop.exe not installed
Moving from Docker Desktop for Windows to Docker Server / CLI for Linux to escape the license fee, I used the standard documentation for Ubuntu to install docker into my WSL2.
After frankensteining it ...
- 141
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216
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Packer Ubuntu 21.10 initramfs unpacking failed write error
I'm trying to create a VMI using the official Ubuntu 21.10 iso using Packer and export it to Vagrant box and, if possible, to a simple ISO that I can install manually on another computer.
I'm getting ...
- 123
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1
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25
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What would be the monthly hosting cost for eSchool Smart System [closed]
I have no idea about DevOps. Sorry in advance if the question is something not relevant.
I have to propose a cost of yearly/monthly for a system. The system will have two versions. Web (React & ...
- 103
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1
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347
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How can we setup the services in my EC2 instance to startup automatically on boot?
When ever I restart my EC2 instance I have to manually use the command systemctl start <service name > to start the service.
Is there any option to automate this thing in the Linux platform?
- 63
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1
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36
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How to ensure data protection on remote server?
We have sensitive data from a customer and need to train a Neural Network for our customers.
However we have no severs to train the Neural Networks, so we want to rent GPU servers. There are many ...
- 11
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0
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38
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Using Azure Active Directory as authentication backend for ssh on linux box
I used to use on-site active directory (providing pubkey though a custom AD field), but in my new company they are using Azure AD. I don't think my old way would work, did anyone already did this ? If ...
- 342
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1
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38
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Ansible user_module exit with "rc: -25" if UID is large
Ansible user_module exit with rc: -25 if trying to create user with UID provided from Active Directory (AD) domain controller (DC).
main.yml
- name: Configure local user for example.com
user:
...
- 348
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1
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609
views
How to assign static IP to Kubernetes cluster?
Is there any way to assign static IP to Kubernetes cluster, in which any user can able to access its application over static IP only.
for an example, I have set up a cluster over 192.168.0.131 (master)...
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330
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Ansible with OpenSUSE transactional server
When using an OpenSUSE transactional server, transactional-update must be used instead of Zypper. Is there any way of doing this with Ansible?
- 11
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1
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1k
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How to add a string to a line when it doesn't exist?
I'm trying to solve a problem where I want to add a setting 'pci=noaer' to all kernel definitions in /boot/grub/grub.conf, but only if the setting doesn't exist. I've managed to get the basic ...
- 13
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1
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2k
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Minikube will not start again after a stop
Running gentoo linux... I am new to kubernetes and learning it on my dev cloud. I am able to start minikube with no issues (other than the second node is missing...not sure why). Then I stop minikube. ...
- 143
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1
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74
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Team City Server issue after upgrade
Recently we have upgraded TC to the latest version (TeamCity Professional 2021.1.1 (build 92714)).
After upgrade builds run fine when a new VCS root is created, but after a push is made to the ...
- 121
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1
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652
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Difference between Docker container with Debian vs VM with Debian?
What is the difference between running a Docker container with Debian (eg. https://hub.docker.com/_/debian/) and then running a virtual machine with Debian? And why is it still an advantage if any?
I'...
- 101
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1
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94
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How to pin public root key when downloading an image with docker pull (Docker Content Trust)?
How can I execute docker pull (with Docker Content Trust enabled) such that it fails if the image doesn't have a valid signature using the private key corresponding to (or subordinate to) the public ...
- 193
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votes
1
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336
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Ansible - Variable expansion inside hostvars declaration?
I have a hardcoded hostvars line, like so:
node1_hostname={{ hostvars['192.168.0.162']['node1_hostname'] }}
I have a set_fact variable from a previous play that I'd like to expand in the host section ...
- 61
1
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1
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471
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Failed to install kubernetes on centos
Following the official documentation, I have an error when trying to install kubernetes cluster yum package.
I am on Centos 7 using yum. So I run this commands:
cat <<EOF | sudo tee /etc/yum....
- 171
6
votes
1
answer
5k
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Ansible: register variable with loop
What’s the best way to use registered variable ‘audit_tools’ to check if all items are own by root ?
Do I need to use Jinja2 filter or something ?
Thanks
- name: Verify audit tools are own by root ...
- 61
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1
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777
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Ansible No such file or directory error message for any executable in Amazon Linux AMI
I'm trying to run this command in a Amazon Linux AMI instance
- name: Run docker
shell: systemctl enable docker && systemctl start docker
And receiving this error message
"stderr&...
- 233
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1
answer
458
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any way to limit "docker logs" output by default?
Context*
I forgot to pass the "--tail" options to the "docker logs" command when inspecting a running container. The affected container dumps tens of millions of logs.
The command ...
- 138
3
votes
1
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205
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Is running linux container on windows aws instance possible?
what I'm trying to achieve is running a Linux(ubuntu LST) container inside a windows server 2019 OS.
The problem is that the windows OS runs as an AWS instance.
There have been problem for me trying ...
- 131
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2
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3k
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Can I upgrade a docker image/container from buntu 18.04 to ubuntu 20.04?
I have a host ubuntu 20.04 running my software on docker with a container derivated from ubuntu 18.04. I would like to use ubuntu 20.04 for several reasons (like the better software on 20.04).
If I ...
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0
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1k
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Ansible/AWS dynamic inventory -- How to create groups based on tags?
I am trying to create custom groups, based on tags. I am using this doc as a reference: https://docs.ansible.com/ansible/latest/plugins/inventory.html#inventory-plugins
As a baseline, in my aws_ec2....
- 61
2
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1
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296
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How do I convert "\n" to linebreaks in my docker logs?
I am using docker-compose up to start a web server in linux but am finding that the stdout is printing "\n" characters instead of creating new lines. This makes stack traces difficult to ...
- 155
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2
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1k
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How to Save and Restore the Iptables rule and configuration from file?
I want to save the current iptables configuration to a file and restore it from a file.
I have a lot of rules and modifying the rules really hard for me.
So, how can i do that?!
- 171
3
votes
1
answer
6k
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GitHub Actions Runner execute commands with sudo GitHub Actions
I have a GitHub action set on self hosted Ubuntu VPS on Linode.
I ran sudo ./svc.sh install and then ./svc.sh start. The runner is up and working but I have a command in my yaml file that needs to run ...
- 151
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0
answers
902
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Remote connection from Docker container by FTP
I built my docker image and run it:
docker run --rm -P -d test:latest
Then I entered the command and opened connection:
ftp
open XXX
I successfully connected and entered user data. After that I ...
- 91
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1
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129
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Porting a docker container to a different Linux host OS
I'm new to Docker. I have looked at many tutorials, however, this is still not clear to me :
For example, If I create a docker image on a system which is using Ubuntu as the host OS. Can I then later ...
- 131
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1
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62
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What are the daily job duties of a devops? [duplicate]
I have been working for linux management over 10 years. In the last 5 years, I have added a lot of coding experience through software development like php, ruby, go, etc. I wanna be a devops, but I ...
- 1
1
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2
answers
978
views
How to sync two directories on same host using Ansible?
I am using the below playbook for mounting partitions on another EBS volumes while provisioning instance on AWS
---
- name: Mounting necessary partitions
hosts: localhost
become: ...
- 133
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1
answer
5k
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How comes a GitLab CI/CD job cant' find its artifacts?
In the Open Source ventilator project, we aim to provide those who focus on testing with a ready-to-go flash file for the Arduino controller board.
While the binaries seem to be there, for some ...
- 6,782