Alpine Linux on Oracle Cloud
- 2020-05-03T14:54:36.284Z: Updated for UEFI support.
Oracle Cloud Free Tier allows user to run several types of virtual machines for free. At the time of writing, Oracle provides limited number of Linux-based images (CentOS, Oracle Linux, and Ubuntu). This article describes the installation of Alpine Linux on Oracle Cloud.
Create a Linux-based instance
First create a Linux-based instance, for example, using the CentOS 7 image. Enable the option which assigns a public address to the instance so that you can access it through SSH.
Once the instance is ready, login the instance using SSH.
Download and boot from Alpine Linux ISO image
On the instance, download the Alpine Linux ISO image. For example:
curl -O 'http://dl-cdn.alpinelinux.org/alpine/v3.10/releases/x86_64/alpine-virt-3.10.2-x86_64.iso'
The URLs of ISO images can be found on the official Alpine Linux download page.
Once the ISO image has been downloaded, write the ISO image to the disk. First identify the disk name. Run:
The output should be similar to the following:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 46.6G 0 disk ├─sda1 8:1 0 512M 0 part /boot/efi ├─sda2 8:2 0 8G 0 part [SWAP] └─sda3 8:3 0 38.1G 0 part /
Write the ISO image to the disk
dd if=alpine-virt-3.10.2-x86_64.iso of=/dev/sda
After the ISO image has been written, disconnect from the instance.
Connect to instance through console connection
Create a console connection to the instance. For example, create a serial console connection. This allow you to manage the instance during the Alpine Linux installation process.
Note that when creating a serial console connection to connect to the instance, you will be asked to provide the public key of a keypair. You may need to specify the corresponding private key when connecting to the serial console connection. For example:
ssh -i ~/.ssh/opc.rsa \ -o ProxyCommand='ssh -i ~/.ssh/opc.rsa \ -W %h:%p \ -p 443 \ email@example.com' \ ocid1.instance.oc1.ap-tokyo-1.bbbbb
~/.ssh/opc.rsa with the path of the private key.
Once connected to the instance through the console connection, you should be able to see the login prompt. For example:
CentOS Linux 7 (Core) Kernel 3.10.0-1062.1.1.el7.x86_64 on an x86_64 opc001 login:
Install Alpine Linux
Now in the instance details page, click the Reboot button. Through the console connection, you should be able to see the system being rebooted.
Alpine Linux will be running from RAM. Login as root. Copy required files from the ISO image, which are on the disk, into RAM.
mkdir /media/setup cp -a /media/sda/* /media/setup mkdir /lib/setup cp -a /.modloop/* /lib/setup
When the files have been copied. Unmount the disk.
/etc/init.d/modloop stop umount /dev/sda
Move the copied files to the appropriate location.
mv /media/setup/* /media/sda/ mv /lib/setup/* /.modloop/
Run the following commands to setup the keyboard layout, hostname, network interface, timezone, and package repositories:
setup-keymap setup-hostname rc-service hostname restart setup-interfaces -a rc-service networking start rc-update add networking boot setup-timezone setup-apkrepos
Set root password:
Before setting up the disk, install several required packages:
apk add grub-efi apk add efibootmgr
Set the boot and swap partition size:
# The boot partition size is set to 512MB. export BOOT_SIZE=512 # The swap partition size is set to 1024MB. export SWAP_SIZE=1024
Use GRUB as the bootloader as it is required for booting the system with UEFI:
export BOOTLOADER=grub # The following makes sure grub-efi is used as the bootloader. export USE_EFI=1
Now setup the disk:
During the installation, choose sys mode. The procedure should look like the following:
The following disk is selected: sda (53.7 GB ORACLE BlockVolume ) How would you like to use it? ('sys', 'data', 'lvm' or '?' for help) [?] sys WARNING: The following disk(s) will be erased: sda (53.7 GB ORACLE BlockVolume ) WARNING: Erase the above disk(s) and continue? [y/N]: y Partition #1 contains a vfat signature. Partition #2 contains a swap signature. Creating file systems... mkfs.fat 4.1 (2017-01-24) Installing system on /dev/sda3: Installing for x86_64-efi platform. Installation finished. No error reported. 100% ############################################==> initramfs: creating /boot/initramfs-virt Generating grub configuration file ... Found linux image: /boot/vmlinuz-virt Found initrd image: /boot/initramfs-virt done Installation is complete. Please reboot.
Now reboot the system.
After the system is rebooted, you can connect to the instance again through SSH, and the console connection can be deleted.