1 files changed, 78 insertions, 0 deletions
diff --git a/debian/cloud-init.config b/debian/cloud-init.config
new file mode 100644
index 00000000..6e9c6f73
--- /dev/null
+++ b/debian/cloud-init.config
@@ -0,0 +1,78 @@
+#!/bin/sh -e
+
+. /usr/share/debconf/confmodule
+
+hasEc2Md() {
+	local d=/var/lib/cloud i=/var/lib/cloud/instance/ f=""
+	local flist="${i}/datasource ${i}/obj.pkl ${d}/cache/obj.pkl"
+	# search current instance data source information
+	for f in ${flist}; do
+		[ -f "${f}" ] || continue
+		grep -q DataSourceEc2 "${f}" 2>/dev/null && return 0
+	done
+
+
+	# there was no data above found that would have been indicated
+	# by a upgrade. lets just see if we can't find the metadata
+	# service.  if wget is not present (it is not 'essential')
+	# then we will quietly return 1
+	local url="http://169.254.169.254/2009-04-04/meta-data/instance-id"
+	i=""
+	if command -v wget >/dev/null 2>&1; then
+		local tout="--connect-timeout 5 --read-timeout 5 --tries 1" 
+		i=$(wget "${url}" ${tout} -O - 2>/dev/null) || :
+	elif command -v curl >/dev/null 2>&1; then
+		i=$(curl "${url}" --max-time 1) || :
+	fi
+	# if instance-id starts with 'i-' then in all likelyhood its good
+	[ "${i#i-}" != "${i}" ] && return 0
+	return 1
+}
+
+get_yaml_list() {
+	# get_yaml_list(file, key, def): return a comma delimited list with the value
+	# for the yaml array defined in 'key' from 'file'. if not found , return 'def'
+	# only really supports 'key: [en1, en2 ]' format.
+	local file="$1" key="$2" default="$3"
+	[ -f "$file" ] || return 1
+	# any thing that didn't match the key is deleted so the final 'p' only
+	# prints things that matched.
+	RET=$(sed -n -e "/^$key:/"'!'d -e "s/$key:[ \[]*//"\
+		-e "s, \]$,," -e p "$file")
+	[ -n "$RET" ] || RET="$default"
+}
+
+# old_dpkg_cfg is very old file that is no longer read by cloud-init.
+# it gets re-named to cloud.cfg.d/90_dpkg.cfg in the preinst.
+dpkg_cfg="/etc/cloud/cloud.cfg.d/90_dpkg.cfg"
+old_dpkg_cfg="/etc/cloud/distro.cfg"
+if [ -f "${old_dpkg_cfg}" -a ! -f "$dpkg_cfg" ]; then
+	dpkg_cfg="${old_dpkg_cfg}"
+   echo "WARN: reading value from ${old_dpkg_cfg}" 1>&2
+fi
+if [ -f "$dpkg_cfg" ]; then
+	if get_yaml_list "$dpkg_cfg" datasource_list NOTFOUND &&
+		val="$RET" && [ "$val" != "NOTFOUND" ]; then
+		db_set cloud-init/datasources $val
+	else
+		echo "WARN: failed to read datasource_list from $dpkg_cfg" 1>&2
+	fi
+elif { db_fget cloud-init/datasources seen || : ; } &&
+		[ "${RET}" = "false" ]; then
+	# this is the first time this we've run (installation or re-install after
+	# purge). try to determine if the Ec2 datasource is there.
+	# if it is, and Ec2 was not in the default list, then add it.
+	db_get cloud-init/datasources
+	def="${RET}"
+	case " ${def}," in
+		*\ Ec2,*) :;;
+		*) hasEc2Md &&
+			db_set cloud-init/datasources "${def:+${def}, }Ec2";;
+	esac
+fi
+
+db_input low cloud-init/datasources || true
+db_go
+
+exit 0
+# vi: ts=4 noexpandtab