Rancher OS is a light weight container Operating system, specially
designed to run Dockerized applications.
Download Rancher ISO
OS images and install it in bare metal
hardware
In my laptop I have already installed
Virtual-box and docker-machine tools.I am going to
deploying Rancher OS VM
using docker-machine command.
C:\Users\Rengs>docker-machine
create -d virtualbox --virtualbox-boot2docker-url https://releases.rancher.com/os/latest/rancheros.iso
Rancher-test
Running pre-create checks...
(Rancher-test) Boot2Docker URL was explicitly set to
"https://releases.rancher.com/os/latest/rancheros.iso" at create
time, so Docker Machine cannot upgrade thi
Creating machine...
(Rancher-test) Boot2Docker URL was explicitly set to
"https://releases.rancher.com/os/latest/rancheros.iso" at create
time, so Docker Machine cannot upgrade thi
(Rancher-test) Downloading
C:\Users\Rengs\.docker\machine\cache\boot2docker.iso from
https://releases.rancher.com/os/latest/rancheros.iso...
(Rancher-test)
0%....10%....20%....30%....40%....50%....60%....70%....80%....90%....100%
(Rancher-test) Creating VirtualBox VM...
(Rancher-test) Creating SSH key...
(Rancher-test) Starting the VM...
(Rancher-test) Check network to re-create if needed...
(Rancher-test) Waiting for an IP...
Waiting for machine to be running, this may take a few minutes...
Detecting operating system of created instance...
Waiting for SSH to be available...
Detecting the provisioner...
Provisioning with rancheros...
Copying certs to the local machine directory...
Copying certs to the remote machine...
Setting Docker configuration on the remote daemon...
Checking connection to Docker...
Docker is up and running!
To see how to connect your Docker Client to the Docker Engine running
on this virtual machine,
run: docker-machine env Rancher-test
C:\Users\Rengs>docker-machine
ls
NAME ACTIVE DRIVER
STATE URL SWARM
DOCKER ERRORS
default - virtualbox Saved Unknown
Rancher-test - virtualbox Running
tcp://192.168.99.100:2376
v1.12.6
C:\Users\Rengs>
Login to the Rancher VM
C:\Users\Rengs>docker-machine
ssh Rancher-test
[docker@Rancher-test ~]$
Verifying the Rancher OS
version and other details.
[docker@Rancher-test ~]$ uname
-a
Linux Rancher-test 4.9.9-rancher #1 SMP Thu Feb 9 13:00:19 UTC 2017
x86_64 GNU/Linux
[docker@Rancher-test /]$ ros -v
ros version v0.8.0
Checking disk usage. It
uses maximum 460MB disk space for OS.
[docker@Rancher-test ~]$
[docker@Rancher-test ~]$ df
-h
Filesystem Size Used Available Use% Mounted on
overlay 19.1G 459.6M
17.7G 2% /
tmpfs 477.5M 0
477.5M 0% /dev
tmpfs 497.0M 0
497.0M 0% /sys/fs/cgroup
/dev/sda 19.1G
459.6M 17.7G 2% /home
none 497.0M 628.0K
496.4M 0% /run
/dev/sda 19.1G 459.6M
17.7G 2% /media
/dev/sda 19.1G 459.6M
17.7G 2% /opt
/dev/sda 19.1G 459.6M
17.7G 2% /mnt
/dev/sda 19.1G 459.6M
17.7G 2% /var/log
/dev/sda 19.1G 459.6M
17.7G 2% /usr/sbin/iptables
devtmpfs 477.5M 0
477.5M 0% /host/dev
shm 64.0M 0
64.0M 0% /host/dev/shm
/dev/sda 19.1G 459.6M
17.7G 2% /etc/docker
/dev/sda 19.1G 459.6M
17.7G 2% /etc/selinux
/dev/sda 19.1G 459.6M
17.7G 2% /usr/lib/modules
none 497.0M 628.0K
496.4M 0% /var/run
/dev/sda 19.1G 459.6M
17.7G 2% /usr/lib/firmware
/dev/sda 19.1G 459.6M
17.7G 2% /var/lib/rancher
/dev/sda 19.1G 459.6M
17.7G 2% /var/lib/docker
/dev/sda 19.1G 459.6M
17.7G 2% /usr/bin/ros
/dev/sda 19.1G 459.6M
17.7G 2% /usr/share/ros
/dev/sda 19.1G 459.6M
17.7G 2% /var/lib/rancher/conf
/dev/sda 19.1G 459.6M
17.7G 2%
/etc/ssl/certs/ca-certificates.crt.rancher
/dev/sda 19.1G
459.6M 17.7G 2% /var/lib/rancher/cache
/dev/sda 19.1G
459.6M 17.7G 2% /etc/resolv.conf
/dev/sda 19.1G 459.6M
17.7G 2% /etc/hostname
/dev/sda 19.1G 459.6M
17.7G 2% /etc/hosts
shm 64.0M 0
64.0M 0% /dev/shm
devtmpfs 477.5M 0
477.5M 0% /dev
shm 64.0M 0
64.0M 0% /dev/shm
/dev/sda 19.1G 459.6M
17.7G 2% /var/lib/docker/overlay
[docker@Rancher-test ~]$
There are two Docker
daemons running in Rancher OS.
i) System Docker - Where Rancher OS runs
System services. System Docker can only used by root.
ii) Normal Docker - Where
our application containers will be deployed
[docker@Rancher-test ~]$ sudo
system-docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS
PORTS NAMES
7e27e12d5258
ancher/os-docker:1.12.6 "ros
user-docker" 6 min ago Up 6 min docker
f02bd52571c5 rancher/os-console:v0.8.0 "/usr/bin/ros
entrypo" 6 min ago Up 6 min console
dacc85ba24c6 rancher/os-base:v0.8.0 "/usr/bin/ros entrypo" 6 min ago
Up 6 min ntp
e50103a50c6f rancher/os-base:v0.8.0
"/usr/bin/ros entrypo" 6 min ago Up 6 min
network
777b16ef8d95 rancher/os-base:v0.8.0
"/usr/bin/ros entrypo" 6 min ago Up 6 min udev
974eb14cc628 rancher/os-base:v0.8.0 "/usr/bin/ros entrypo" 6 min ago Up
6 min syslog
90478b595064 rancher/os-acpid:v0.8.0
"/usr/bin/ros entrypo" 6 min ago Up 6 min acpid
[docker@Rancher-test /]$ sudo
ros engine list
disabled docker-1.10.3
disabled docker-1.11.2
current docker-1.12.6
disabled docker-1.13.1
[docker@Rancher-test ~]$
sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS
NAMES
[docker@Rancher-test ~]$ docker
--version
Docker version 1.12.6, build 78d1802
ROS administration commands
Changing docker engine
version in ROS
sudo ros engine
switch docker-1.11.2
Start other docker engine
after next reboot
$ sudo ros engine enable docker-1.10.3
Network configuration
$ sudo ros config
set rancher.network.interfaces.eth1.address 172.68.1.100/24
$ sudo ros config
set rancher.network.interfaces.eth1.gateway 172.68.1.1
$ sudo ros config
set rancher.network.interfaces.eth1.mtu 1500
$ sudo ros config set rancher.network.interfaces.eth1.dhcp false
Upgrade ROS
[docker@Rancher-test /]$ sudo
ros os version
v0.8.0
[docker@Rancher-test /]$ sudo
ros os list
rancher/os:v0.8.0 remote latest running
rancher/os:v0.7.1 remote available
rancher/os:v0.7.0 remote available
rancher/os:v0.6.1 remote available
rancher/os:v0.6.0 remote available
rancher/os:v0.5.0 remote available
rancher/os:v0.4.5 remote available
rancher/os:v0.4.4 remote available
rancher/os:v0.4.3 remote available
rancher/os:v0.4.2 remote available
rancher/os:v0.4.1 remote available
rancher/os:v0.4.0 remote available
[docker@Rancher-test /]$
[docker@Rancher-test /]$ sudo
ros os upgrade
Upgrading to
rancher/os:v0.8.0
Already at version
v0.8.0. Continue anyway [y/N]: N
[docker@Rancher-test /]$
Configuration file
sudo cat /var/lib/rancher/conf/cloud-config.yml
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