```
So, I guess I’m missing the one image that matches my kernel?
I guess my question here is.. how best to avoid issues like this, where I’m dealing kernel mis-matches?
(Unless, of course, there’s some other issue like a known problem in docker, etc)
TIA
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 4:11 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/2 "2017-04-08T04:11:12Z")
Why not use a 16.04 image? Also you could give the output of `uname -r` – which would be immensely helpful here but I’d recommend just updating to 16.04 unless you have a reason to be on 14.04
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 4:12 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/3 "2017-04-08T04:12:58Z")
This has been 14.04 since I installed it a while back.. I could upgrade to 16, but will that stop the mysterious aufs issues which have come up from time to time?
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 4:14 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/4 "2017-04-08T04:14:37Z")
I ran discourse just fine on 14.04…i’m confused
Have you done: `sudo apt-get install \ linux-image-extra-$(uname -r) \ linux-image-extra-virtual` from [the installation guide](https://docs.docker.com/engine/installation/linux/ubuntu/#recommended-extra-packages-for-trusty-1404)?
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 4:18 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/5 "2017-04-08T04:18:05Z")
> [@watchmanmonitor](#):
>
> This has been 14.04 since I installed it a while back.. I could upgrade to 16, but will that stop the mysterious aufs issues which have come up from time to time?
Yup, it certainly will! I’ve been sysadmin for two discourse installs, so can vouch for it not sucking. Just ensure you follow the docker install instructions.
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 4:28 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/6 "2017-04-08T04:28:11Z")
Well then… that’s reason enough to upgrade to ubuntu 16 ❤
After the latest apt-get upgrade, the right `3.13.0-71` image-extra package was missing, hence the aufs error.
The command you linked to solved it for now, I’ll be making backups of all my discourse hosts & upgrading.
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 4:30 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/7 "2017-04-08T04:30:35Z")
You don’t need to upgrade now…you won’t have an issue…but you REALLY should at some point 🙂
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 4:32 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/8 "2017-04-08T04:32:13Z")
Upgrade now, when I’m ready for issues? Or when some random apt-get upgrade will stop the show?
Hahaha, thanks, this is plenty reason to start the process of upgrading.
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 4:54 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/9 "2017-04-08T04:54:40Z")
> [@watchmanmonitor](#):
>
> Upgrade now, when I’m ready for issues? Or when some random apt-get upgrade will stop the show?
>
> Hahaha, thanks, this is plenty reason to start the process of upgrading.
You didn’t install a package dependency, which is in the docker installation guide… that’s what caused your problem.
---
### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [Avril 8, 2017, 4:57 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/10 "2017-04-08T04:57:18Z")
This has always been an odd problem to me since the [official install](https://meta.discourse.org/t/142537?silent=true) guide says to use the wget command from `get.docker.com` to install Docker. And I have _never_ observed this problem on any install we did, which obviously follows the official guide slavishly.
`wget -qO- https://get.docker.com/ | sh`
So this implies people who do have this problem installed Docker in some oddball, non-install-guide way… somehow.
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 5:00 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/11 "2017-04-08T05:00:38Z")
I dunno about the docker aspect.. this instance has been running fine for over a year, through other docker upgrades even.
Today I did `apt-get upgrade` and I got fussed at about a lack of aufs. I don’t even think it was a docker issue, but a mismatch of kernel & image-extra. If ubuntu 16 resolves that issue, I’m going to put image-extra out of my life with an OS upgrade.
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 5:06 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/12 "2017-04-08T05:06:02Z")
This is the start of this host’s .bash\_history
```bash
sudo install -o root -g root -m 0600 /dev/null /swapfile
dd if=/dev/zero of=/swapfile bs=1k count=1024k
mkswap /swapfile
swapon /swapfile
echo "/swapfile swap swap auto 0 0" | sudo tee -a /etc/fstab
sudo sysctl -w vm.swappiness=10
echo vm.swappiness = 10 | sudo tee -a /etc/sysctl.conf
wget -qO- https://get.docker.com/ | sh
mkdir /var/discourse
cd /var/discourse
git clone https://github.com/discourse/discourse_docker.git /var/discourse
ls -al
vi containers/app.yml
apt-get update
```
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 5:15 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/13 "2017-04-08T05:15:28Z")
> [@codinghorror](#):
>
> wget -qO- [https://get.docker.com/](https://get.docker.com/) | sh
Didn’t docker silently deprecate this method?
---
### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [Avril 8, 2017, 5:27 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/14 "2017-04-08T05:27:28Z")
Nope try it yourself and see.
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 5:37 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/15 "2017-04-08T05:37:08Z")
Too bad it didn’t include a trigger to always add the kernel’s related image-extras package.
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 6:38 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/16 "2017-04-08T06:38:07Z")
> [@codinghorror](#):
>
> Nope try it yourself and see.
It works – but it could stop working at any time is what I mean.
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 6:39 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/17 "2017-04-08T06:39:15Z")
Soooo what’d they replace it with?
---
### Author:  [@robbyoconnor](https://meta.discourse.org/u/robbyoconnor)
#### Post date: [Avril 8, 2017, 6:40 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/18 "2017-04-08T06:40:35Z")
> [@watchmanmonitor](#):
>
> Soooo what’d they replace it with?
[this](https://docs.docker.com/engine/installation/linux/ubuntu/#install-from-a-package) – I actually use ansible to install docker in almost all cases.
---
### Author:  [@watchmanmonitor](https://meta.discourse.org/u/watchmanmonitor)
#### Post date: [Avril 8, 2017, 6:41 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/19 "2017-04-08T06:41:30Z")
Does it help prevent aufs related failures after `apt-get upgrade`s?
---
### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [Avril 8, 2017, 6:43 UTC](https://meta.discourse.org/t/problems-with-docker-and-kernel-on-digital-ocean/60627/20 "2017-04-08T06:43:15Z")
Still something super hinky with this as we literally _never_ saw this problem with hundreds of official guide based installs across a period of _literally years_. Did you add any “extra” stuff or steps?
(I agree it has been reported on meta a few times but I strongly suspect “extra” things were done…)
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