mirror of
https://github.com/flatcar/scripts.git
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0d0c7c7578
The use of getopts was leading to conflicts between this script's short options and qemu's long options. For example -serial was getting interpreted as -s -- erial which is not very helpful.
136 lines
3.5 KiB
Bash
Executable File
136 lines
3.5 KiB
Bash
Executable File
#!/bin/sh
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SCRIPT_DIR="`dirname "$0"`"
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VM_NAME=
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VM_UUID=
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VM_IMAGE=
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VM_KERNEL=
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VM_INITRD=
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VM_MEMORY=
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VM_CDROM=
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VM_NCPUS="`grep -c ^processor /proc/cpuinfo`"
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SSH_PORT=2222
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SSH_KEYS=""
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SAFE_ARGS=0
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USAGE="Usage: $0 [-a authorized_keys] [--] [qemu options...]
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Options:
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-a FILE SSH public keys for login access. [~/.ssh/id_{dsa,rsa}.pub]
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-p PORT The port on localhost to map to the VM's sshd. [2222]
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-s Safe settings: single simple cpu, ide disks.
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-h this ;-)
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This script is a wrapper around qemu for starting CoreOS virtual machines.
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The -a option may be used to specify a particular ssh public key to give
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login access to. If -a is not provided ~/.ssh/id_{dsa,rsa}.pub is used.
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If no public key is provided or found the VM will still boot but you may
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be unable to login unless you built the image yourself after setting a
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password for the core user with the 'set_shared_user_password.sh' script.
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Any arguments after -a and -p will be passed through to qemu, -- may be
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used as an explicit separator. See the qemu(1) man page for more details.
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"
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while [ $# -ge 1 ]; do
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case "$1" in
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-a|-authorized-keys)
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SSH_KEYS="$2"
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shift 2 ;;
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-p|-ssh-port)
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SSH_PORT="$2"
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shift 2 ;;
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-s|-safe)
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SAFE_ARGS=1
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shift ;;
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-v|-verbose)
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set -x
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shift ;;
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-h|-help|--help)
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echo "$USAGE"
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exit ;;
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--)
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shift
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break ;;
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*)
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break ;;
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esac
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done
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METADATA=$(mktemp -t -d coreos-meta-data.XXXXXXXXXX)
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if [ $? -ne 0 ] || [ ! -d "$METADATA" ]; then
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echo "$0: mktemp -d failed!" >&2
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exit 1
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fi
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trap "rm -rf '$METADATA'" EXIT
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# Do our best to create an authorized_keys file
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if [ -n "$SSH_KEYS" ]; then
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if [ ! -f "$SSH_KEYS" ]; then
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echo "$0: SSH keys file not found: $SSH_KEYS" >&2
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exit 1
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elif ! cp "$SSH_KEYS" "${METADATA}/authorized_keys"; then
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echo "$0: Failed to copy SSH keys from $SSH_KEYS" >&2
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exit 1
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fi
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else
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# Nothing provided, try fetching from ssh-agent and the local fs
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if [ -S "$SSH_AUTH_SOCK" ]; then
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ssh-add -L >> "${METADATA}/authorized_keys"
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fi
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for default_key in ~/.ssh/id_*.pub; do
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if [ ! -f "$default_key" ]; then
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continue
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fi
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cat "$default_key" >> "${METADATA}/authorized_keys"
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done
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fi
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# Start assembling our default command line arguments
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if [ "${SAFE_ARGS}" -eq 1 ]; then
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disk_type="ide"
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else
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disk_type="virtio"
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# Emulate the host CPU closely in both features and cores.
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set -- -cpu host -smp "${VM_NCPUS}" "$@"
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fi
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if [ -n "${VM_IMAGE}" ]; then
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set -- -drive if=${disk_type},file="${SCRIPT_DIR}/${VM_IMAGE}" "$@"
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fi
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if [ -n "${VM_KERNEL}" ]; then
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set -- -kernel "${SCRIPT_DIR}/${VM_KERNEL}" "$@"
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fi
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if [ -n "${VM_INITRD}" ]; then
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set -- -initrd "${SCRIPT_DIR}/${VM_INITRD}" "$@"
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fi
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if [ -n "${VM_UUID}" ]; then
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set -- -uuid "$VM_UUID" "$@"
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fi
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if [ -n "${VM_CDROM}" ]; then
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set -- -cdrom "$VM_CDROM" "$@"
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fi
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# Default to KVM, fall back on full emulation
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# ${METADATA} will be mounted in CoreOS as /media/metadata
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qemu-system-x86_64 \
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-name "$VM_NAME" \
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-m ${VM_MEMORY} \
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-machine accel=kvm:tcg \
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-net nic,vlan=0,model=virtio \
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-net user,vlan=0,hostfwd=tcp::"${SSH_PORT}"-:22 \
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-fsdev local,id=metadata,security_model=none,readonly,path="${METADATA}" \
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-device virtio-9p-pci,fsdev=metadata,mount_tag=metadata \
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"$@"
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RET=$?
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# Cleanup!
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rm -rf "${METADATA}"
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trap - EXIT
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exit ${RET}
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