install CoreOS on ubuntu 13.10 KVM host

I’m newbie to CoreOS :)

about coreos: http://coreos.com/

just referred to http://coreos.com/docs/qemu/

# tail -1 /etc/lsb-release ;uname -ri DISTRIB_DESCRIPTION="Ubuntu 13.10" 3.11.0-12-generic x86_64 # qemu-system-x86_64 --version QEMU emulator version 1.5.0 (Debian 1.5.0+dfsg-3ubuntu5), Copyright (c) 2003-2008 Fabrice Bellard

download a shell which is used to boot CoreOS and a image.

# wget http://storage.core-os.net/coreos/amd64-generic/dev-channel/coreos_production_qemu.sh # wget http://storage.core-os.net/coreos/amd64-generic/dev-channel/coreos_production_qemu_image.img.bz2 # chmod u+x coreos_production_qemu.sh # bunzip2 coreos_production_qemu_image.img.bz2 # file coreos_production_qemu_image.img coreos_production_qemu_image.img: QEMU QCOW Image (v2), 5721032192 bytes

Seen from the script, it seems to boot coreos with KVM.

# Default to KVM, fall back on full emulation # ${METADATA} will be mounted in CoreOS as /media/metadata qemu-system-x86_64 \    -name "$VM_NAME" \    -uuid "$VM_UUID" \    -m ${VM_MEMORY} \    -machine accel=kvm:tcg \    -drive index=0,if=virtio,media=disk,format=qcow2,file="${IMAGE_PATH}" \    -net nic,vlan=0,model=virtio \    -net user,vlan=0,hostfwd=tcp::"${SSH_PORT}"-:22 \    -fsdev local,id=metadata,security_model=none,readonly,path="${METADATA}" \    -device virtio-9p-pci,fsdev=metadata,mount_tag=metadata \    "$@" RET=$?

to loting to the coreos, you need create ssh key.

on the KVM host

# whoami root # ssh-keygen

boot the coreos

# whoami root # ./coreos_production_qemu.sh -nographic This is localhost.unknown_domain (Linux x86_64 3.10.10+) 16:41:38 SSH host key: ac:df:9b:7d:0f:e7:46:6c:72:1c:a5:3f:52:7d:17:ae (RSA) SSH host key: c2:e1:9a:69:cc:6a:03:12:51:43:6f:bf:5c:71:70:d9 (DSA) bond0:   docker0: 172.17.42.1 fe80::f411:23ff:feb9:1c9c eth0:  fe80::5054:ff:fe12:3456 gre0:   gretap0:   lo: 127.0.0.1 ::1 tunl0:   This is localhost.unknown_domain (Linux x86_64 3.10.10+) 16:49:11 SSH host key: ac:df:9b:7d:0f:e7:46:6c:72:1c:a5:3f:52:7d:17:ae (RSA) SSH host key: c2:e1:9a:69:cc:6a:03:12:51:43:6f:bf:5c:71:70:d9 (DSA) bond0:   docker0: 172.17.42.1 fe80::9428:21ff:fefa:8097 eth0:  fe80::5054:ff:fe12:3456 gre0:   gretap0:   lo: 127.0.0.1 ::1 tunl0:   localhost login:

open a terminal and login to the coreos

on the KVM host

root@ubuntu:~# ssh -l core -p 2222 127.0.0.1 The authenticity of host '[127.0.0.1]:2222 ([127.0.0.1]:2222)' can't be established. RSA key fingerprint is ac:df:9b:7d:0f:e7:46:6c:72:1c:a5:3f:52:7d:17:ae. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '[127.0.0.1]:2222' (RSA) to the list of known hosts.   ______                ____  _____  / ____/___  ________  / __ \/ ___/ / /   / __ \/ ___/ _ \/ / / /\__ \ / /___/ /_/ / /  /  __/ /_/ /___/ / \____/\____/_/   \___/\____//____/ core@localhost ~ $ core@localhost ~ $ sudo su - localhost ~ # localhost ~ # cat /etc/lsb-release DISTRIB_ID=CoreOS DISTRIB_RELEASE=106.0.0 DISTRIB_CODENAME="West Coast Style" DISTRIB_DESCRIPTION="CoreOS 106.0.0 (Official Build) dev-channel amd64-generic test" COREOS_RELEASE_BOARD=amd64-generic COREOS_RELEASE_DESCRIPTION="106.0.0 (Official Build) dev-channel amd64-generic test" COREOS_RELEASE_NAME=CoreOS COREOS_RELEASE_TRACK=dev-channel COREOS_RELEASE_VERSION=106.0.0 COREOS_AUSERVER=htt localhost .ssh # shutdown -h now