I want to install Discourse on my server and it needs docker to work. I already have WHM with Cpanel installed on Centos 6 dedicated server, should I install docker or it will create problems?
If it's okay to install Docker on my server then should I install it on a single site or on the whole server via root?, I need to run 2 copies on discourse on two different domains.
Also, let me know if there will be any performance issue after installing Discourse.
Thanks
Haven't found anyone who has answered this question. I too am wondering the same.
However, I'm going to go ahead and try it.
Steps I have taken so far:
Create a Centos 7 fresh install server (as I have had issues with docker setups on Centos 6 previously and was told repeatedly Centos 7 fixes those issues).
Manually (via command line) setup WHM.
Submit ticket to have cPanel license assigned to our new server (I was told this was not supported, only to correct the staff telling me so with reference to another ticket telling me I have to request they assign a cpanel license to my Centos 7 setup, as vultr.com does not as of yet have a one click app install for WHM/Cpanel on Centos 7.) Cpanel license was then assigned to my Centos 7 server after correcting staff member.
After all WHM/Cpanel setup completed and working like a charm (including installing CSF for WHM)... I took a snapshot of the server so I can restore it if all else fails.
Waiting for snapshot to finish, reading up on requirements for docker and discourse, then will attempt to set the same up on the same server...
Server Specs (Vultr.com):
4 vCore
RAM: 8192 MB
Storage: 100 GB SSD
Bandwidth: 4000 GB (0%)
OS: CentOS 7 x64
I will return and relate my experience and steps taken to have both running.
FYI. I am not a server admin whatsoever, but a noob who can learn tech stuff enough to get by. I have setup docker droplets on digital ocean successfully a few times, so I hope I can combine the two to see if I can get both working on the same instance rather than pay for two separate servers for both Discourse/Docker and WHM/Cpanel.
I followed this tutorial:
link
I Skipped Setup Swap File as my server has enough ram.
I also made sure to disable SELinux.
nano /etc/sysconfig/selinux (disabled, then reboot server)
sestatus
Just run this command:
curl -fsSL https://get.docker.com/ | bash
and be happy!
Related
Can I install Docker over a server with pre-installed cPanel and CentOS 7? Since I am not aware of Docker, I am not completely sure whether it will mess with cPanel or not. I already have a server with CentOS 7 and cPanel configured. I want to know if I can install Docker over this configuration I mentioned without messing up?
Yes you can install docker over cPanel/WHM just like installing it on any other CentOS server/virtual machine.
Just follow these simple steps (as root):
1) yum install -y yum-utils device-mapper-persistent-data lvm2 (these should be already installed...)
2) yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
3) yum install docker-ce
4) enable docker at boot (systemctl enable docker)
5) start docker service (systemctl start docker)
The guide above is for CentOS 7.x. Don't expect to find any references or options related to Docker in the WHM interface. You will be able to control docker via command line from a SSH shell.
I have some docker containers already running on my cPanel/WHM server and I have no issues with them. I basically use them for caching, proxying and other similar stuff.
And as long as you follow these instructions, you won't mess-up any of your cPanel/WHM services/settings or current cPanel accounts/settings/sites/emails etc.
Not sure why you haven't tried this already!
I've been doing research and working on getting Docker working on cPanel. It's not just getting it to work on a CentOS 7 box but rather making it palatable for the cPanel crowd in the form of a plugin. So far I can confirm that it's absolutely doable. Here's what I've accomplished and how:
Integrate Docker Compose with cPanel (which is somewhat a step
further from WHM)
Leverage the user-namespace kernel feature in Linux so Docker
services can't escalate their privileges (see userns remap)
Leverage Docker Compose so users can build complex services and
start ready apps from the store with a click
Make sure services starting via Docker run on a non-public IP on the
server. Everything gets routed via ProxyPass
cPanel has been gracious to provide a Slack channel for people to discuss this upcoming plugin. I'd be more than happy to invite you if you'd like to be kept updated or to contribute. Let me know!
FYI, there's more info here on https://www.unixy.net/docker if you're interested. Please note that this plugin is in private beta but more than happy to let people use it!
Yes you could, in fact someone else has done it already: https://github.com/mirhosting/cPanel-docker
I'm totally new to Docker and had few queries with the Docker installation.
I've Windows 7 64 bit OS and installed Oracle Virtualbox to run Ubuntu 16.04 ISO image.
I've installed Docker and it works fine.
The problem I face is, each time I shutdown the VM created in Virtualbox and start it again, I have to run the complete steps to setup Docker again. No settings are saved. Even the documents I save on Ubuntu desktop are gone. Can someone please help me understand as to why this happens?
One doubt I have is, each time when I start Ubuntu, I opt to run from the CD. Could this be the reason?
enter image description here
Yes, you should instead go through the installation. Then you can even disconnect the optical drive to use less resources and avoid confusion in the future.
We are running docker 1.7.1, build 786b29d on RHEL 6.7. Recently we have had multiple times when the docker daemon locked up and we had to reboot the machine to get it back.
A typical scenario is that a container that has been running fine for weeks suddenly starts throwing errors. Sometime we can restart the container and all is well. But other times all docker commands will hang, and restarting the daemon fails, and I see this in a ps:
4 Z root 4895 1 0 80 0 - 0 exit Aug23 ? 00:01:24 [docker]
Looking in the system log I've seen this:
device-mapper: ioctl: unable to remove open device docker-253:6-1048578-317bb6ad40cded3fbfd752d95551861c2e4ef08dffc1186853fea0e85da6b12b
INFO: task docker:16676 blocked for more than 120 seconds.
Not tainted 2.6.32-573.12.1.el6.x86_64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
docker D 000000000000000b 0 16676 1 0x00000080
ffff88035ef13ea8 0000000000000082 ffff88035ef13e70 ffff88035ef13e6c
ffff88035ef13e28 ffff88062fc29a00 0000376c85170937 ffff8800283759c0
0000000000000400 00000001039d40c7 ffff8803000445f8 ffff88035ef13fd8
Call Trace:
[] _mutexlock_slowpath+0x96/0x210
[] ? wake_up_process+0x15/0x20
[] mutex_lock+0x2b/0x50
[] sync_filesystems+0x26/0x150
[] sys_sync+0x17/0x40
[] system_call_fastpath+0x16/0x1b
The latest docker version is 1.12.1 and we are on 1.7.1. Can or should I install a new version? 1.7.1 is the version yum installs. If I did want a new version how would I install that (sorry if that is a dumb question, I am not a sys admin).
Googling, I found on this on a Red Hat site "Red Hat does not recommend running any version of Docker on any RHEL 6 releases." We have been running docker on RHEL 6 for a few years, so this confuses me. Upgrading to RHEL 7 is not really an option for us right now.
Can anyone shed any light on these issue? We need docker to work reliably without having to reboot often.
Docker 1.7.1 is really old by today's standards. There have been hundreds of bugs fixed, enhancements to driver stacks, security patches, and valuable features added in the versions since. It looks like you're having a issue with your storage stack, and there is a good chance this is fixed in a newer version.
Docker has stated that default versions in package management systems like yum and apt can be way out of date, and that you should use their repo. The best way to do this is add their Yum repo information to your system so you can install it like other packages. The instructions are here: Installation on Red Hat Enterprise Linux.
Note: This will allow you to install Docker, and the service will be called docker, but the package is docker-engine. This has confused some people in the past.
yum install docker-engine
Docker has also provided a script that does this to make things easier (run as admin/root):
curl -fsSL https://get.docker.com/ | sh
Don't use a RHEL6 based system.
RHEL6 uses a 2.6 kernel with backported fixes to keep Docker working. Docker would normally require a 3.10+ kernel. Docker dropped support for RHEL6 from v1.8 on so it's unlikely there will be any more packages for it.
If you must use RHEL6, don't use the default loopback devicemapper for storage. Setup an LVM thin pool for Docker to use.
I would like to use the Spark-graphX packages available to Neo4j through Mazerunner, however I am an analyst and not a software person. I am running Windows 7 on my laptop and Neo4j 2.3.0, and would like a step-by-step guide explaining how I can set-up Mazerunner for both Community & Enterprise. There's a lot of mention of dockers and containers, and I have no idea what these are, or how to set them up. Simple instructions would be of sooo much help! :)
Docker is primarily Operating System Level Visualization technology designed to run on Unix based systems (Linux,Mac,FreeBSD). Luckily Docker provides a Windows version that sort of does the same thing on Unix.
What happens is, after you have installed Docker, it allows you to run what they call containers which are basically virtual machines on top of your host (Windows 7 Running Docker). This allows you to run services like Neo4j in an isolated environment. Docker also allows you to download and install pre-configured, pre-compiled images of operating systems that usually provide some sort of service or have some software pre-installed.
In your case, I believe all you have to do is:
First install Docker
Use "Docker Compose" to download and install the images.
Continue Reading the Tutorial as you have now installed the required docker images
Note: Some of the operations, like the one in Step 2 will require command-line access and Also the creation of a "docker-compose.yml" so, be sure to visit all the links I have provided. Spend a little time going through them and you should be alright.
PS: great blog. definitely bookmarking it!
I have been looking around for the installation steps for BigBlueButton 0.9 in CentOS version 6+ without any results. I have only been provided installation steps for BigBlueButton 0.6. Any directions where I can get the installation details for BBB 0.9 in CentOS 6+?
so far i have not seen BBB installation steps for CentOS however, you can surely able to install Docker on CentOS for BBB.
You easily install bigbluebbutton on centos by simply installing all the open source components separately first.
You can find the open source components here,http://bigbluebutton.org/components/
After that, install the webapps to bigbluebutton web and bigbluebutton app.
Configure the bigbluebutton.propreties in the web, create the ruby god conf file to allow record and play back, create the needed directories and setup the nginx config.
All these tasks are simple by them selves, but this process will take you a few days.
It took me a 2 days to install 0.81 on centos, so i can definitely guarantee that it is possible and doable without any extra needed applications.