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Questions tagged [coreos]

CoreOS is a minimal Linux distribution focused on containerized workloads, especially ones orchestrated by the container scheduler Kubernetes.

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1answer
398 views

Differences between Container Linux, Red Hat CoreOS and Fedora CoreOS?

TL;DR Is "Container Linux", "Red Hat CoreOS" and "Fedora CoreOS" basically the same? What are the differences in between? TS; DR I understood that "CoreOS" was renamed to "Container Linux by CoreOS"...
2
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1answer
139 views

Including ExecStop commands makes service (consul) fail to start properly

I'm monkeying with consul trying to set up a small CoreOS cluster. If I save the following file to /etc/systemd/system/consul.service, enable the service, and reboot the VM, all 3 vms in the cluster ...
3
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1answer
76 views

How can I execute an equivalent of `head -z` when I don't have the `-z` option available?

I need head -z for a script (off-topic, but the motivation can be found in this question), but in my CoreOS 835.13.0 I get head: invalid option -- 'z'. Full head --help output: Usage: head [OPTION].....
0
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1answer
937 views

How to install anything on CoreOS?

I am running CoreOS 835.13.0. This is the kind of problems I've ran into: man - man: command not found info - info: command not found head -z a.txt - head: invalid option -- 'z' apt-get update - apt-...
0
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1answer
50 views

Rancher - HTTPS cert issue - installing cattle docker container

I am trying to add a new host to my Rancher environment (using v1.6.17). I add the public IP and hostname then copy & paste the Docker link to the other host. I'm getting CA certificate errors as ...
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2answers
1k views

CoreOS: Run a custom script, only once, at boot time

I am using the following CoreOS v1688.5.3 [ Rhyolite ] server and i have a specific requirement where i would have to run a particular python script only once, when the server boots up. What would be ...
0
votes
1answer
400 views

How to install GlusterFS on Core OS?

I have provisioned a kubernetes cluster across CoreOS hosts with kubespray, and am trying to setup container native storage with gluster-kubernetes. The problem I am running into is that CoreOS has ...
0
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2answers
127 views

How to schedule a job as non-root user in CoreOS

I have a script on my CoreOS machine which look like below, that I am using to ssh to multiple nodes from a list and get required details host_det=$(ssh -Ao StrictHostKeyChecking=no -o BatchMode=yes -...
0
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1answer
331 views

Use variables in PXE config for booting CoreOS

I am using PXELinux to deploy some CoreOS nodes. currently the servers all use the "default" config in tftpboot/ My boot config contains the following append ... cloud-config-url=http://<server&...
3
votes
1answer
1k views

Why is NFS client using low-numbered ports?

I am running a CoreOS EC2 instance. I run a process on this instance that listens on local port 950. Usually, everything works fine, but after a recent reboot of the CoreOS server the process could ...
0
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1answer
163 views

Default Interactive TTY prints daemon output

I work for a company that deploys clustered products using coreos and docker, and as part of our deployment, we automatically start up a few docker containers to expose, among others, a web interface ...
7
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1answer
1k views

What are the downsides of disabling THP and why is it enabled by default on many distros?

I and my team recently noticed that starting Redis on our VMs gives the following warning: "WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and ...
2
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1answer
60 views

How can I install or work with Ubuntu core? Are there any other cores?

This is a ported Ubuntu core for an arm-based computer board(Nanopi m1): I did write it on SD card, but there is nothing to do with this. No terminal, no options! How can I install something upon ...
0
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1answer
214 views

Is CoreOS affected by CVE-2016-8655?

I'm struggling to figure out whether CoreOS if affected by CVE-2016-8655 or not - it was disclosed to the public on the 6th of December 2016. The latest stable release is 4.7.3 and according to ...
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2answers
380 views

What do I need to do to install the relevant CoreOS linux-headers to make VirtualBox happy?

This is how far I've gotten: echo "deb http://download.virtualbox.org/virtualbox/debian jessie contrib" | tee -a /etc/apt/sources.list wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc ...
4
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1answer
2k views

How to achieve processor affinity in containers?

I see with kubernetes it's possible to set node affinity for certain workloads. I'm wondering if there are any facilities in the various container technologies, such as docker, rocket etc that allow ...
3
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2answers
1k views

How to install APT/dpkg on any Linux that doesn't have it?

First I'm gonna confess that I'm quite new to the world of Linux and only used Ubuntu/LinuxMint/Debian. I just came across a Linux distro called "Core Linux", which is only 11mb in size. Naturally, ...
0
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1answer
234 views

CoreOS - Hosting cloud-config using nginx

I've been using Hosting cloud-config using nginx as an example: There's a config that you need to put into nginx config file: location ~ ^/user_data { root /path/to/cloud/config/files; ...
1
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1answer
994 views

How to manually update a package on CoreOS?

I am using CoreOS 493.0.0+2014-11-14-1501. This version of CoreOS is using OpenSSL OpenSSL 1.0.1j 15 Oct 2014. When I manually try to update using update_engine_client -update the update fails and I ...
1
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1answer
1k views

Docker communication between containers

Using CoreOS (docker preinstalled), I am failing to make two containers communicate together. I am trying to setup a MySql container called by a Gogs container (Git server). So here is what I did: ...
3
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1answer
3k views

systemd // failed with result 'dependency'

I'm quite new to this systemd topic. I have some Units with varios Requires, After and Before. On some Units I got messages like: tinc.service: Job tinc.service/start failed with result 'dependency'. ...
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2answers
414 views

How to send files to coreos from windows workstation

I have some nodejs projects and other files that I want to put on the coreos private server, what is the easiest method to take files from the workstation (windows) and put them into the coreos system?...
1
vote
1answer
65 views

Do I need at least 3 machines to be able to work on CoreOS?

This is a strange question, but I can't find an answer to it: can I use CoreOS on one machine? Many guides/docs on the internet mention 3 machines. Or can I use it on 2 machines? I'm familiar with ...
4
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1answer
710 views

Connecting to wifi in CoreOS?

I can't seem to find very much info on this pretty basic topic for CoreOS: How can I connect my laptop to the internet with wifi? I can't seem to find much of any information for how to connect to the ...
2
votes
1answer
795 views

Fresh CoreOS install hangs during boot

I decided to replace windows 7 with CoreOS on my computer for research and learning purposes. I was able to successfully install CoreOS version 766.4.0 from a USB drive but after restarting the ...
1
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1answer
660 views

Running a systemd service once a day (on a CoreOS cluster)

I currently have a CoreOS cluster on AWS. The cluster runs multiples containers, mainly for Rails applications. However, one of this container is a pure Ruby app processing a lot of data from specific ...
27
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4answers
28k views

Is there any way to install Nano on CoreOS?

CoreOS does not include a package manager but my preferred text editor is Nano, not vi or vim. Is there any way around this? gcc is not available so its not possible to compile from source: core@...
3
votes
1answer
2k views

How to install graphic capabilities to CoreOs?

I would like to install CoreOs as a base on my desktop machine. Then, I could launch some containers, with eventualy a graphical environnement. So I have to add all the graphic stack: GPU drivers, ...
5
votes
2answers
1k views

CoreOS can't pull docker container on boot

While following the systemd guide I ran into an issue with this example configuration: [Unit] Description=MyApp After=docker.service Requires=docker.service [Service] TimeoutStartSec=0 ExecStartPre=-...
0
votes
1answer
669 views

CoreOS in Vagrant - interfaces

I'm trying to understand the networking model in CoreOS but I'm having trouble making the operating system bend to my will. The problem I'm facing is that I want to use weave as an overlay network ...
0
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1answer
1k views

Can't login with the set password deployed by proxmox in CoreOS

I have tried to install CoreOS to my VM in proxmox, I have create a file cloud-config.yaml: #cloud-config hostname: coreos coreos: etcd: addr: $private_ipv4:4001 peer-addr: $...