install hook fails on LXC containers without FQDN

When executing the README examples, both Combined HDFS and MapReduce, Separate HDFS and MapReduce deployment schemas fail the installation hook on all nodes with the following output:

This may be specific to my LXC installation, as my LXC Containers are not generated with FQD hostnames.

(note: hooks/install were modified to set -ex from set -e for the output)

hdfs-datacluster/0:install % hooks/install
+ MAPRED_CONFIG='mapred_reduce_parallel_copies
mapred_child_java_opts
io_sort_factor
io_sort_mb
mapred_job_tracker_handler_count
tasktracker_http_threads'
+ CONFIG_FILES='/etc/hadoop/conf.juju/hdfs-site.xml
/etc/hadoop/conf.juju/core-site.xml
/etc/hadoop/conf.juju/mapred-site.xml
/etc/hadoop/conf.juju/hadoop-env.sh
/etc/hadoop/conf.juju/hadoop-metrics2.properties'
++ resolve_hdfs_role
++ role=unconfigured
++ '[' -d /usr/share/doc/hadoop-namenode ']'
++ :
++ '[' -d /usr/share/doc/hadoop-secondarynamenode ']'
++ :
++ '[' -d /usr/share/doc/hadoop-datanode ']'
++ :
++ echo unconfigured
+ hdfs_role=unconfigured
++ resolve_mapred_role
++ role=unconfigured
++ '[' -d /usr/share/doc/hadoop-jobtracker ']'
++ :
++ '[' -d /usr/share/doc/hadoop-tasktracker ']'
++ :
++ echo unconfigured
+ mapred_role=unconfigured
++ basename hooks/install
+ COMMAND=install
+ case $COMMAND in
+ configure_hosts
++ unit-get private-address
+ private_address=10.0.5.123
++ hostname
+ hostname=charles-local-machine-2
+ grep -q '^127.0.0.1.*charles-local-machine-2' /etc/hosts
++ hostname -f
hostname: Name or service not known
+ hostname=