Qemu-simple
Setup walkthrough
Basic setup that gets you going, you would still need to read main Qemu documentations for advanced features.
Objective
- Install Alpinelinux.
- Install Qemu and its dependencies.
- Download Alpinelinux ISO and required files.
- Start a Qemu instance of Alpinelinux ISO.
- Test basic networking.
Test bed
WIP
- Describe here the test bed/setup used to run the scripts below.
- MODEL: Dell Laptop.
- CPU: Intel i5 2nd generation with KVM enabled.
- RAM: 8GB
Install Alpinelinux
- Diskless installs (Ram based)
- SYS installs
Tip: - for further setup to work correctly, its assumed that alpinelinux installed in done for version between v3.21.x and v3.22.x
v3.21.x-v3.22.x
Install Qemu and its dependencies
# apk add qemu qemu-img qemu-system-x86_64 qemu-ui-gtk
# modprobe tun
v3.21.x-v3.22.x
Download Alpinelinux ISO and required files
# cd ~ # wget https://cdn.alpinelinux.org/v3.22/releases/x86_64/alpine-extended-3.22.0-x86_64.iso
Start a Qemu instance of Alpinelinux ISO
- Basic setup (with ssh forwarding)
- Basic tap setup
v3.21.x-v3.22.x
Basic setup (with ssh forwarding)
#!/bin/sh
## -------------------------------------------------
## Simple setup (manually)
## no root privileges needed
## QEMU emulator version 10.0.0 (alpinelinux) ####
## -------------------------------------------------
ISO=alpine-extended-3.22.0-x86_64.iso
qemu-system-x86_64 -enable-kvm -m 2048M -cdrom ${ISO} \
-device virtio-net,netdev=net0 \
-netdev user,id=net0,hostfwd=tcp::5555-:22 \
-nographic -display curses \
-boot d
## ----
## on GUEST
# ifconfig eth0 10.0.2.15
# route add default gw 10.0.2.2
# busybox ping alpinelinux.org
## -------------------------------------------------
v3.21.x-v3.22.x
Basic tap setup
#!/bin/sh
## -------------------------------------------------
## Manual setup with defaults and no preset scripts
## Works in root
## QEMU emulator version 10.0.0+ (alpinelinux) ####
## modprobe tun # needed if not loaded already
## -------------------------------------------------
ISO=alpine-extended-3.22.0-x86_64.iso
qemu-system-x86_64 -enable-kvm -m 2048M -cdrom ${ISO} \
-device virtio-net,netdev=nd0 \
-netdev tap,id=nd0,ifname=tap0,script=no,downscript=no \
-nographic -display curses \
-boot d
## ----
## on HOST
# ifconfig tap0 10.0.2.2
## on GUEST
# ifconfig eth0 10.0.2.15
# route add default gw 10.0.2.2
## ----
## TEST (HOST) - IMPORTANT: remove firewall if any
# nc -l 1234 > filename.out
## TEST (GUEST)
# echo -e "aaa\nbbb" > test.txt
# nc 10.0.2.2 1234 < test.txt
## TEST (HOST)
# cat filename.out
## -------------------------------------------------