RancherOs Installation

To install RancherOS on your ESXi server, first of all, download rancheros ISO image from its website here

1. Create new Virtual Machine for RancherOS

On ESXi, create a new Virtual Machine with at least 1GB memory. After you created appliance, upload rancheros.iso to your ESXi datastore and set CD/DVD rom to use it.

2. Start rancheros

Once you clicked start button, the OS will boot up rapidly and prompt for login. Now rancheros is running in your RAM, you can login with credential rancher/rancher. Anything you change now will not be saved after you reboot. What we need is a docker ready OS so we need to install Rancher OS to our disk.

3. Prepare your cloud-config.yml

Before we install rancheros to our hard disk, you need to setup cloud-config first.

You also need to generate a new SSH key for cloud-config.yml file by following this article

Add your public key to cloud-config.yml file like following:

This is for rancher os first boot configuration after installation, you can use your private key to connect this host.

Next, we are going to configure network before installation. Following is an example, you need to configure DNS, IP address of interface and default gateway.

#cloud-config
ssh_authorized_keys:
 - ssh-rsa AAAAB3NzaCURHZlGvtcq4bZXxkl wid@voxteneo.asia
hostname: rancheros-cd01
rancher:
  network:
    dns:
      nameservers:
      - 202.150.128.65
    interfaces:
      eth*:
        dhcp: false
      eth0:
        address: 202.150.132.121/28
        gateway: 202.150.132.113
        mtu: 1500

Make sure you only have one ethernet interface, current rancher os installer has problem when configuring multiple NICs.

At last, you need to put your cloud-config.yml to rancher os. After you login, configure a accessible temporary IP address and default gateway on eth0, then scp your cloud-config.yml to it.

Following is an example

On RancherOS, configure IP and default gateway

$ sudo ip addr add 10.138.103.63/24 dev eth0
$ sudo route add default gw 10.138.103.254

On your local machine, copy your cloud-config.yml to RancherOS via SCP or other method.

4. Install

You should be all set if you done everything right in previous steps. Now we can call installer to initiate installation.

$ ros install -c cloud-config.yml -d /dev/sda --append "rancher.password=rancher"

Installer will download rancher/os to your system and format /dev/sda.

At last, installer will prompt for reboot, after manual reboot you can configure own rancher os now.

 

Source :
http://drinkey.github.io/docker/2015/07/05/rancheros-installation-guide/

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