RancherOS: An OS for Docker Containers
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RancherOS: An OS for Docker Containers
1–10 of 66 posts
Re: RancherOS: An OS for Docker Containers
#2Interesting... Played around with CoreOS a little bit, but wasn't quite confident with it... currently rolling Docker under Ubuntu Server containers.
I really like the idea of these micro OSes, and both CoreOS and RancherOS have some interesting aspects to them.
Re: RancherOS: An OS for Docker Containers
#3Docker itself as PID 1 is… creative.
Good things they've thought through:
- boots fast, does almost the absolute minimum it needs to get up and running
- supporting user data and at least minimal config via cloud-init
- properly minimal: you have to use a Debian image to set up persistent storage with mkfs.ext4! (edit: when using the ISO version, which is not the primary use case)
- but helpfully familiar: you can install distro flavoured "console" experiences with more than just busybox
- it's almost a better Boot2Docker than Boot2Docker! (a little bit of love for VirtualBox / VMware shared storage wouldn't go astray)
Re: RancherOS: An OS for Docker Containers
#4"Systemd and Docker don’t work well together as they both attempt to manage control groups."
Has anybody hit actual issues with this? Having used Docker and systemd concurrently for a while, I can't say this has every caused conflicts, any more than the fact that both myself and my guests manage drinks in my fridge.
Re: RancherOS: An OS for Docker Containers
#5Interesting... Played around with CoreOS a little bit, but wasn't quite confident with it... currently rolling Docker under Ubuntu Server containers. I really like the idea of these micro OSes, and both CoreOS and RancherOS have some interesting aspects to them.
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Re: RancherOS: An OS for Docker Containers
#6I'm leery of entrusting so much to Docker... I've had something as innocuous as pulling a remote image crash the daemon (due to a misconfigured private registry) which brought all my containers down. Imagine if this happened to all your critical system services!
Re: RancherOS: An OS for Docker Containers
#7I'm leery of entrusting so much to Docker... I've had something as innocuous as pulling a remote image crash the daemon (due to a misconfigured private registry) which brought all my containers down. Imagine if this happened to all your critical system services!
That's why they have system-docker as PID 1, running essential services in containers.
One of those services is docker, for running Random Shit You Downloaded Off The Internet. :-)
Re: RancherOS: An OS for Docker Containers
#8How does this differ from CoreOS?
Re: RancherOS: An OS for Docker Containers
#9How does this differ from CoreOS?
Most obvious difference is swapping out systemd for Docker (which then runs another Docker).
Re: RancherOS: An OS for Docker Containers
#10Is SELinux or GRSecurity built in and enabled?