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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.

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1answer
18 views

Docker won't create a bridge network without being given an explicit subnet

The problem The problem is that this happens: $ docker network create alpine4 Error response from daemon: could not find an available, non-overlapping IPv4 address pool among the defaults to assign ...
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0answers
21 views

Jenkins Fatal Exception

I have installed my jenkins on Linux machine with 2.73.1 version. Now my most of the jobs are getting failed due to same reason. AU bin/jobs/Sync.class A .settings A ....
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votes
1answer
14 views

DirectAdmin 2 users same folder

So I'm still a rookie in devops but I am looking for a way where we can link a folder from user1 to a folder from user2. I guess its sort of a symbolic link? How would you do something like that? Or ...
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0answers
21 views

How to pass a /dev/disk device on macOS into Linux Docker?

I've connected external HDD via USD on macOS, and I'm running Ubuntu's Docker container as: docker run -it --device=/dev/disk3 --privileged ubuntu bash but the device is not present in the container:...
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0answers
7 views

How can I see the deployed container in Azure web app for containers

I have started using the web app for containers could not locate where the container is. And I want to see the contents of the deployment. Where are they located? I know it is there as the site works. ...
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0answers
59 views

How to debug a docker on web app for containers in Azure which does not start

I am able to run my containers locally. I published them to container registry. And the deployment from container registry to web apps for containers is successful. But the service does not turn ...
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0answers
40 views

Running a powershell script via Jenkins on a Linux host

I have a powershell script cloned into my workspace from a bitbucket repository. If I login to the Jenkins server cli I can run it by doing cd /var/lib/jenkins/workspace/powershell pwsh ./psscript....
0
votes
1answer
21 views

Re-initialize etcd-cluster completely (on coreos)

Over the past updates (espcially the update to etcd-wrapper: https://github.com/coreos/coreos-overlay/tree/master/app-admin/etcd-wrapper) my etcd-cluster with five machines broke. Now I'm trying to ...
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1answer
30 views

Set user in aws

I have a lot of instance in aws.I have build through terraform. I have made scripts of making user(e.g. user1 rather than ec2-user).But i am facing one issue.when i check .ssh/authorized_key. I have ...
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0answers
30 views

How create ftp and ssh access for users and keep overall environment safe

//edit In practice I would like to create a shared web hosting and I wonder how create ftp and ssh access for users and keep overall environment safe. Docker will be ok for this purpose? How use ...
0
votes
1answer
24 views

Copying a file with special character & spaces

I have been trying to copy a file from my remote server to AWS s3, but the file name is quite weird and I am not able to figure it out what can I do. I tried using escape characters but that did not ...
0
votes
1answer
95 views

Join a Linux Docker swarm with a local Windows Docker for test purposes

I'm currenlty trying to connect/join a Linux Docker Swarm cluster with my Windows machine in order to test a stack without sending the stack over and over to my test cluster under Linux. My problem is ...
2
votes
2answers
44 views

Deploy two independently hosted services in production at once without any downtime

I have two different services. Let's say Service A and Service B. Service B is dependent on Service A. Both code bases are hosted in separate repo in Bitbucket and code bases are maintained by ...
0
votes
0answers
39 views

Do you need to install MySQL on Linux separately from MariaDB?

I'm compiling MariaDB from source, and trying to test the DB following the instructions, and I keep getting errors about mySQL (which I thought packages were installed along side MariaDB) Failed ...
1
vote
0answers
53 views

Ultimate docker permission solution

I'm using docker some time and I like the conception very much. But I found a thing is a big problem for me. I'm talking about permissions. While I'm not worrying about production, setting up my ...
5
votes
2answers
73 views

How to automate rolling upgrades for ec2 running linux behind elastic and/or application load balancer?

Would like to ask for recommendations on ready automated solutions or templates for rolling ec2 instance upgrade on AWS, requiring a reboot with ELB/ALB. Specifically required to perform the ...
0
votes
1answer
123 views

Windows Docker in swarm with Linux nodes connection issue

I have the following setup for my docker swarm: three Linux master nodes one Linux slave nodes Windows slave node They are connected with an overlay network. Within the linux nodes everything works ...
1
vote
1answer
614 views

Permission errors with non-root USER when running on Linux

I have been getting some unexpected failures with the execution of my Docker images when running on my Ubuntu 16.04.3 LTS machine. I'm using Docker version 18.02.0-ce (edge), installed from apt. I've ...
5
votes
6answers
158 views

In the HashiCorp stack, where's the appropriate place to add users?

I'm in the process of building some custom Linux images using HashiCorp's Packer, which will later be deployed to Azure using HashiCorp's Terraform. The VMs created from these images will need to have ...
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vote
2answers
455 views

Creating a cron job with Ansible (ERROR! 'cron' is not a valid attribute for a Play)

I am relatively inexperienced when it comes to Ansible however I have previously created playbooks which will create a cron job successfully. For the life of me I cannot work out what is wrong with my ...
3
votes
1answer
34 views

Is it possible to securely delete a file from a virtual disk in a cloud provider?

Considering that virtual hard drives are generally formatted using something like ext3 that abstracts away from the underlying block device, which in and of itself is an abstraction over the top of a ...
1
vote
1answer
506 views

Apache container cant access php files mounted in /var/www/ - 403 error

I want to run my php website in a container with apache and php7 I am using this docker image : https://hub.docker.com/r/nimmis/apache-php7/ I run Fedora so I enter the example command given in ...
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2answers
955 views

How can a Windows server be a slave to Jenkins running on Linux when there in an error installing the slave-agent.jnlp file?

I want to have a Windows Server 2016 slave node with a master Jenkins (version 2.89.2) running on Red Hat Enterprise Linux 7.x. I am trying to install the slave-agent.jnlp file from the Jenkins web ...
4
votes
1answer
51 views

What's missing from this simple recipe that creates a user?

I've spun many boxes in the cloud before, but was growing tired of going through the same dance; and as I'm trying to get familiar with Chef, I figured, that's a good use case to do a little learning. ...
4
votes
1answer
77 views

Pause/Suspend guest in KVM without virsh and libvirtd

I have installed KVM without libvirt/virsh and virtualmanager. Packages which installed are kvm qemu-kvm bridge-utils libguestfs-tools How can I pause/suspend VM in this case?
5
votes
2answers
2k views

Difference between chroot and Docker

I don't understand the difference between docker and chroot. Yes its nice in terms of the packaging the registry. But somehow I get the feeling its just chroot with extra bells and whistles. I know I'...
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votes
1answer
60 views

How to avoid and fix the warning from Graphite-manage?

We installed Graphite on our Linux server, and when we started running it, we saw the following warning from the graphite-manage script: graphite-manage syncdb --noinput /usr/lib/python2.7/site-...
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votes
2answers
53 views

CentOS 7 SSH login with Keys Authentication

Is there any possibility to create one master account (for one master laptop for example), from which I can log in to all accounts available on the server ? My server has Keys Authentication enabled ...
6
votes
2answers
677 views

Does Docker allow containers to be OS agnostic?

We currently use a Windows based server to host 2 VMs. One VM uses Windows with a Windows app and the other VM uses Linux with a Linux app. Is the below scenario possible? Bare server with Windows ...
3
votes
1answer
231 views

Build FreeBSD Docker image using Ubuntu host OS

I know that in generally it is impossible to build FreeBSD Docker image on Linux host OS due to different kernels and sys calls. Relevant discussion. However, I would like to know maybe there is a ...
2
votes
2answers
64 views

Automatic production deployment for a Node.js app on RHEL 7?

I am looking for some way to have a maximally simple(no Jenkins or anything like that) automatic production deployment for a Node.js application on a RHEL 7 system. The caveat is: At the organization ...
2
votes
1answer
42 views

archive contents of a reviewboard server as read-only

My team was using an Ubuntu box to host an instance of Reviewboard 2.5.2 that we used for a few years before migrating to a Bitbucket service in the cloud. The machine was maintained by my predecessor ...
5
votes
4answers
4k views

docker “Cannot mkdir: Permission denied”

I'm trying to run wordpress inside docker. I've been following this tutorial : https://www.sitepoint.com/how-to-use-the-official-docker-wordpress-image/ But when I run this command : docker run -e ...
4
votes
1answer
571 views

Are NixOS and GuixSD the incoming Linux distros of DevOps?

The main advantage of these distros is the declarative approach which allows for setup to be done in the same way as you would configure a Vagrantfile or Dockerfile. In the way that Docker replaced/...
1
vote
1answer
73 views

Best method of retrieving environment information via Salt Stack?

I have been tasked with using Salt Stack to find out what files/services exist in each of our environments (Test, UAT, Production). The Salt master can speak to all servers in Test and UAT (...
1
vote
0answers
61 views

Running MySQLite3 with PHP PDO in a Docker Container

I'm currently trying to build a site in a Docker container running in an Ubuntu VM, which has Apache and PHP installed already. I want to be able to access Sqlite3 features with PHP using PDO. ...
4
votes
2answers
109 views

How to create Golang Linux binaries using a Windows host

When go build is issued on a Windows host a .exe binary is created. How to ensure that a Linux binary is created on a Windows host? The following was tried, but did not solve the issue: GOOS=linux;...
2
votes
1answer
378 views

Incorrect timezoneID inside docker container

I have created a docker image from the base Centos7 image and while running the container from it, the time and timezone were not in sync with my host. To give the container the same timezone as that ...
4
votes
2answers
706 views

How to automate Powershell's interactive Get-Credential method?

I am trying to write a python script which automates the powershell's Get-Credential method. Here is something i wrote: import subprocess COMMAND_LINE = 'powershell' powershell = subprocess.Popen(...
2
votes
1answer
510 views

Ansible tmp files created with odd permissions

I have an ansible playbook which can be simplified to this: - name: Provision server hosts: all_hosts become: yes ...
1
vote
1answer
454 views

After removing Docker container, why is it automatically re-created?

I'm using ubuntu-16.04 desktop and installed Docker-1.5-1 and docker-engine-17.05.0~ce-0~ubuntu-xenial, in which I installed openmedicus/phplist. My aim is to remove the container, and the image as ...
4
votes
2answers
429 views

How to detect what interface has private IP in Ansible

I plan to reconfigure iptables on our servers (mostly CentOS 7, some CentOS 6) with different network configurations, some on 1Gbit interface, some on 10Gbit, some with VLANs and some with configured ...
5
votes
1answer
75 views

Debug BackendConnectionErrors from Kubernetes Service LoadBalancer sesrvice

We recently moved some of our production infrastructure to Kubernetes. Many pods are exposed through a LoadBalancer service on AWS. This creates an ELB, registers each node in the cluster with the ELB,...
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votes
3answers
3k views

How to get memory usage per process with sar, sysstat?

Can I get memory usage per process with Linux? we monitor our servers with sysstat/sar. But besides seeing that memory went off the roof at some point, we can't pinpoint which process was getting ...
5
votes
1answer
148 views

Advantages of Linux Containers over Docker

I'd like to understand the differences between Linux Containers and Docker, especially what kind of advantages Containers have in comparison to Docker.
5
votes
1answer
977 views

How do you connect a build node to the Jenkins master?

I'd like to connect a build node to the Jenkins master. Ideally without using a web browser or being in front of the physical machine. What would be the easiest way to achieve that?
33
votes
5answers
35k views

How do you back up Jenkins jobs & master configs?

I'd like to backup all Jenkins jobs and config files. What's the easiest way of doing it?
14
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3answers
2k views

Which SCM tools does Jenkins support?

I'm aware that Jenkins supports Git and SVN. What other SCM tools does Jenkins support?