Start a jail task which creates the zfs datasets and installs a new_jail script.

ansible/roles/jail/templates/new_jail.bash.j2

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+#
+# Create a new jail
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+: ${JAIL_MOUNTPOINT:="{{ jail_zfs_dataset_mountpoint }}/jails"}
+
+function die {
+    echo >&2 "$@"
+    exit 1
+}
+
+[ "$#" -eq 2 ] || die "1 argument required, $# provided"
+
+JAIL_NAME="$2"
+export DESTDIR="${JAIL_MOUNTPOINT}/$JAIL_NAME"
+
+function by_src {
+    cd /usr/src
+    make -j 16 buildworld
+    make installworld DESTDIR=$DESTDIR
+    make distribution DESTDIR=$DESTDIR
+}
+
+function by_bin {
+    DESTRELEASE=13.1-RELEASE
+    DESTARCH=`uname -m`
+    SOURCEURL=http://ftp.freebsd.org/pub/FreeBSD/releases/$DESTARCH/$DESTRELEASE/
+    for component in base ports; do fetch $SOURCEURL/$component.txz -o - | tar -xf - -C "$DESTDIR" ; done
+}
+
+if [ "$1" = "src" ]; then
+    by_src
+elif [ "$1" = "bin" ]; then
+    by_bin
+else
+    die "First argument must be either 'src' or 'bin', got $1"
+fi