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#!/sbin/openrc-run
# vim:set ft=bash:
description="Provides EC2 cloud bootstrap"
depend() {
need net
provide cloud-final
}
_get_metadata() {
local uri="$1"
wget -qO - "http://169.254.169.254/latest/$uri" 2>/dev/null
}
_update_hostname() {
local ec2_fqdn="$(_get_metadata meta-data/hostname)"
local short_hostname="${ec2_fqdn%%\.*}"
echo "$short_hostname" > /etc/hostname
hostname -F /etc/hostname
echo -e "127.0.1.1\t$ec2_fqdn $short_hostname" >> /etc/hosts
}
_set_ssh_keys() {
local user="$1"
local group="$(getent passwd $user | cut -d: -f4)"
local ssh_dir="$(getent passwd $user | cut -d: -f6)/.ssh"
local keys_file="$ssh_dir/authorized_keys"
if [ ! -d "$ssh_dir" ]; then
mkdir -p "$ssh_dir"
chmod 755 "$ssh_dir"
fi
[ -f "$keys_file" ] && rm "$keys_file"
touch "$keys_file"
chmod 600 "$keys_file"
chown -R $user:$group "$ssh_dir"
for key in "$(_get_metadata meta-data/public-keys/)"; do
echo $(_get_metadata "meta-data/public-keys/${key%=*}/openssh-key/") >> "$keys_file"
done
}
_run_userdata() {
user_data=$(_get_metadata user-data)
if echo $user_data | grep '^#!/' 2>&1 >/dev/null; then
echo "$user_data" > /var/lib/cloud/user-data.sh
chmod +x /var/lib/cloud/user-data.sh
/var/lib/cloud/user-data.sh > /var/log/cloud-bootstrap.log 2>&1
fi
}
_resize_root_partition() {
resize2fs $(mountpoint -n / | cut -d' ' -f1)
}
_disable_password() {
echo "$1:*" | chpasswd -e
}
start() {
# Don't bootstrap if the host has already been bootstrapped
[ -f "/var/lib/cloud/.bootstrap-complete" ] && return 0
[ -d "/var/lib/cloud" ] || mkdir -p /var/lib/cloud
ebegin "Disabling root password"; _disable_password root; eend $?
ebegin "Disabling alpine password"; _disable_password alpine; eend $?
ebegin "Resizing root partition"; _resize_root_partition; eend $?
ebegin "Setting ec2 hostname"; _update_hostname; eend $?
ebegin "Setting ec2 user ssh keys"; _set_ssh_keys "alpine"; eend $?
ebegin "Running ec2 user data script"; _run_userdata; eend $?
touch "/var/lib/cloud/.bootstrap-complete"
}
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