Testing Rancher OS
Introduction
My first steps trying RancherOS.
References
- https://medium.com/devs-foodit/pimp-my-jenkins-continuous-delivery-dashboard-edition-229463755730
- http://rancher.com/deploying-a-scalable-jenkins-cluster-with-docker-and-rancher/
- http://thenewstack.io/now-in-beta-rancher-labs-runs-docker-natively-in-production/
- https://www.quora.com/What-are-the-differences-between-RancherOS-and-CoreOS
- https://github.com/rancher/os
- http://docs.rancher.com/os/quick-start-guide/
Launching RancherOS using Vagrant
(adapted from http://docs.rancher.com/os/quick-start-guide/)
Logged in as gmacario@itm-gmacario-w7, start a Cygwin terminal
Clone the RancherOS Vagrant repository.
$ mkdir -p ~/test && cd ~/test
$ git clone https://github.com/rancher/os-vagrant.git
$ cd os-vagrant
Startup your VM with vagrant up
$ vagrant up
Bringing machine 'rancher-01' up with 'virtualbox' provider...
...
==> rancher-01: Machine booted and ready!
==> rancher-01: Setting hostname...
==> rancher-01: Configuring and enabling network interfaces...
Log into your VM with vagrant ssh
$ vagrant ssh
[rancher@rancher-01 ~]$
A first look at RancherOS
Check kernel version
[rancher@rancher-01 ~]$ uname -a
Linux rancher-01 4.2.3-rancher #1 SMP Wed Oct 14 11:25:04 UTC 2015 x86_64 GNU/Linux
[rancher@rancher-01 ~]$
Inspect disk usage
[rancher@rancher-01 ~]$ sudo df -h
Filesystem Size Used Available Use% Mounted on
overlay 36.5G 231.4M 34.3G 1% /
tmpfs 484.9M 0 484.9M 0% /dev
tmpfs 498.3M 0 498.3M 0% /sys/fs/cgroup
none 498.3M 252.0K 498.0M 0% /run
/dev/sda1 36.5G 231.4M 34.3G 1% /home
/dev/sda1 36.5G 231.4M 34.3G 1% /opt
/dev/sda1 36.5G 231.4M 34.3G 1% /etc/docker
/dev/sda1 36.5G 231.4M 34.3G 1% /lib/firmware
none 498.3M 252.0K 498.0M 0% /var/run
/dev/sda1 36.5G 231.4M 34.3G 1% /sbin/reboot
/dev/sda1 36.5G 231.4M 34.3G 1% /var/log
devtmpfs 484.9M 0 484.9M 0% /host/dev
shm 64.0M 0 64.0M 0% /host/dev/shm
/dev/sda1 36.5G 231.4M 34.3G 1% /sbin/shutdown
/dev/sda1 36.5G 231.4M 34.3G 1% /sbin/halt
/dev/sda1 36.5G 231.4M 34.3G 1% /sbin/iptables
/dev/sda1 36.5G 231.4M 34.3G 1% /sbin/poweroff
/dev/sda1 36.5G 231.4M 34.3G 1% /etc/rkt
/dev/sda1 36.5G 231.4M 34.3G 1% /lib/modules
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/sbin/ros
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/bin/system-docker
/dev/sda1 36.5G 231.4M 34.3G 1% /var/lib/docker
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/bin/user-docker
/dev/sda1 36.5G 231.4M 34.3G 1% /var/lib/rkt
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/sbin/wait-for-network
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/bin/dockerlaunch
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/bin/cloud-init
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/bin/docker.dist
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/sbin/rancherctl
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/sbin/wait-for-docker
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/bin/respawn
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/sbin/netconf
/dev/sda1 36.5G 231.4M 34.3G 1% /var/lib/rancher
/dev/sda1 36.5G 231.4M 34.3G 1% /var/lib/rancher/conf
/dev/sda1 36.5G 231.4M 34.3G 1% /usr/share/ros/os-config.yml
/dev/sda1 36.5G 231.4M 34.3G 1% /etc/ssl/certs/ca-certificates.crt.rancher
/dev/sda1 36.5G 231.4M 34.3G 1% /etc/resolv.conf
/dev/sda1 36.5G 231.4M 34.3G 1% /etc/hostname
shm 64.0M 0 64.0M 0% /dev/shm
devtmpfs 484.9M 0 484.9M 0% /dev
shm 64.0M 0 64.0M 0% /dev/shm
[rancher@rancher-01 ~]$
Check network interfaces
[root@rancher-01 ~]$ ifconfig
docker-sys Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:172.18.42.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::c4e4:8ff:fe67:ae2d/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:368 (368.0 B) TX bytes:648 (648.0 B)
docker0 Link encap:Ethernet HWaddr 02:42:46:53:C8:82
inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:46ff:fe53:c882/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:59 errors:0 dropped:0 overruns:0 frame:0
TX packets:54 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4003 (3.9 KiB) TX bytes:4563 (4.4 KiB)
eth0 Link encap:Ethernet HWaddr 08:00:27:9F:1D:71
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe9f:1d71/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:104139 errors:0 dropped:0 overruns:0 frame:0
TX packets:55480 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:75924932 (72.4 MiB) TX bytes:3401703 (3.2 MiB)
eth1 Link encap:Ethernet HWaddr 08:00:27:19:16:E4
inet addr:172.19.8.101 Bcast:0.0.0.0 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe19:16e4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7181 errors:0 dropped:4 overruns:0 frame:0
TX packets:29 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:755660 (737.9 KiB) TX bytes:3362 (3.2 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
veth0196292 Link encap:Ethernet HWaddr FE:49:55:09:12:AA
inet6 addr: fe80::fc49:55ff:fe09:12aa/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:13 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:822 (822.0 B) TX bytes:1944 (1.8 KiB)
[root@rancher-01 ~]$
Check Docker version
[rancher@rancher-01 ~]$ docker version
Client:
Version: 1.9.1-rc1
API version: 1.21
Go version: go1.4.3
Git commit: 4663423
Built: Mon Nov 16 06:05:31 UTC 2015
OS/Arch: linux/amd64
Server:
Version: 1.9.1-rc1
API version: 1.21
Go version: go1.4.3
Git commit: 4663423
Built: Mon Nov 16 06:05:31 UTC 2015
OS/Arch: linux/amd64
[rancher@rancher-01 ~]$
Inspect running system containers
Notice that system-docker ps fails unless it is run as root.
[rancher@rancher-01 ~]$ sudo -i
[root@rancher-01 ~]# system-docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
692016a11484 rancher/os-docker:v0.4.1 "/usr/sbin/entry.sh /" 2 hours ago Up 2 hours docker
ebe39a8deb65 rancher/os-console:v0.4.1 "/usr/sbin/entry.sh /" 2 hours ago Up 2 hours os_console_1
ec28508ac472 rancher/os-ntp:v0.4.1 "/usr/sbin/entry.sh /" 2 hours ago Up 2 hours ntp
503dd1a3f135 rancher/os-network:v0.4.1 "/usr/sbin/entry.sh n" 2 hours ago Up 2 hours network
ccf03fbf1693 rancher/os-udev:v0.4.1 "/usr/sbin/entry.sh /" 2 hours ago Up 2 hours udev
f6f621151318 rancher/os-acpid:v0.4.1 "/usr/sbin/entry.sh /" 2 hours ago Up 2 hours acpid
24a59d843f13 rancher/os-syslog:v0.4.1 "/usr/sbin/entry.sh /" 2 hours ago Up 2 hours syslog
[root@rancher-01 ~]# exit
logout
[rancher@rancher-01 ~]$
Run Ubuntu inside a container
[rancher@rancher-01 ~]$ docker run -it ubuntu
root@f2180b351d1b:/# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
root@f2180b351d1b:/#
Run nginx inside a container
[rancher@rancher-01 ~]$ ifconfig eth1 | grep "inet addr"
inet addr:172.19.8.101 Bcast:0.0.0.0 Mask:255.255.255.0
[rancher@rancher-01 ~]$ docker run -d --name nginx -p 8000:80 husseingalal/nginxbusy
8331240ea5fdf078822dc3f79380627e6137d2a5d7d1c75fad567da12419b850
[rancher@rancher-01 ~]$
Now logged as gmacario@itm-gmacario-w7, browse http://172.19.8.101:8000/
Deploy a system service container
[rancher@rancher-01 ~]$ sudo system-docker run -d --net=host --name busydash husseingalal/busydash
b6fb4f1983399f285c1e29f0133b454837d2d9d2f461f3328b3467233573195f
[rancher@rancher-01 ~]$
logged as gmacario@itm-gmacario-w7, browse http://172.19.8.101/
NOTE 1: Docker image husseingalal/busydash was built from the following Dockerfile:
FROM hwestphal/nodebox
MAINTAINER hussein.galal.ahmed.11@gmail.com
RUN opkg-install unzip
RUN curl -k -L -o master.zip https://github.com/afaqurk/linux-dash/archive/master.zip
RUN unzip master.zip
WORKDIR linux-dash-master
RUN npm install
ENTRYPOINT ["node","server"]
NOTE 2: Sources for Docker image hwestphal/nodebox are available at https://github.com/hwestphal/docker-nodebox
That's all for today... Stay tuned for future posts about RancherOS!