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https://github.com/flatcar/scripts.git
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0f84e3b05f
This one is more automagical and sets up ssh keys from ssh-agent and the user's home directory by default. Also adds an option for setting the ssh port so it can be something other than 2222. Script should be sufficiently portable, tested in bash, dash, and ash.
91 lines
2.6 KiB
Bash
Executable File
91 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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SCRIPT_DIR="`dirname "$0"`"
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VM_NAME=
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VM_UUID=
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VM_IMAGE=
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VM_MEMORY=
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IMAGE_PATH="${SCRIPT_DIR}/${VM_IMAGE}"
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SSH_PORT=2222
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SSH_KEYS=""
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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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-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 getopts ":a:p:vh" OPTION
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do
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case $OPTION in
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a) SSH_KEYS="$OPTARG"; shift 2 ;;
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p) SSH_PORT="$OPTARG"; shift 2 ;;
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v) set -x; shift ;;
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h) echo "$USAGE"; exit ;;
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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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# 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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-uuid "$VM_UUID" \
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-m ${VM_MEMORY} \
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-machine accel=kvm:tcg \
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-drive index=0,if=virtio,media=disk,format=qcow2,file="${IMAGE_PATH}" \
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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 $?
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