diff --git a/Fockerfile b/Fockerfile
index aa1493e..ba8436b 100644
--- a/Fockerfile
+++ b/Fockerfile
@@ -1,13 +1,15 @@
 base: freebsd-latest
 
 steps:
-  - run: |
-      pkg -y install -y python3 && \
-      pkg -y install -y py37-pip
-  - run: |
-      pkg install -y py37-yaml
   - copy:
     - [ '/tmp/x', '/etc/x' ]
     - [ 'focker-compose.yml', '/etc/focker-compose.yml' ]
   - run: |
-      pkg install py37-certbot
+      pkg install -y python3 && \
+      pkg install -y py37-pip && \
+      pkg install -y py37-yaml && \
+      pkg install -y py37-certbot && \
+      mkdir -p /persist/etc/ssh && \
+      sed -i '' -e 's/\/etc\/ssh\/ssh_host_/\/persist\/etc\/ssh\/ssh_host_/g' /etc/rc.d/sshd && \
+      sed -i '' -e 's/\/etc\/ssh\/ssh_host_/\/persist\/etc\/ssh\/ssh_host_/g' /etc/ssh/sshd_config && \
+      sed -i '' -e 's/#HostKey/HostKey/g' /etc/ssh/sshd_config
diff --git a/focker.py b/focker.py
index 8759a22..9b645ee 100644
--- a/focker.py
+++ b/focker.py
@@ -8,6 +8,11 @@ from .image import command_image_build, \
     command_image_list, \
     command_image_prune, \
     command_image_remove
+from .volume import command_volume_create, \
+    command_volume_prune, \
+    command_volume_list, \
+    command_volume_tag, \
+    command_volume_untag
 import sys
 from .zfs import zfs_init
 from .jail import command_jail_run
@@ -17,6 +22,7 @@ def create_parser():
     parser_top = ArgumentParser()
     subparsers_top = parser_top.add_subparsers()
 
+    # image
     subparsers = subparsers_top.add_parser('image').add_subparsers()
     parser = subparsers.add_parser('build')
     parser.set_defaults(func=command_image_build)
@@ -45,12 +51,33 @@ def create_parser():
     # parser.add_argument('--remove-children', '-r', action='store_true')
     parser.add_argument('--remove-dependents', '-R', action='store_true')
 
+    # jail
     subparsers = subparsers_top.add_parser('jail').add_subparsers()
     parser = subparsers.add_parser('run')
     parser.set_defaults(func=command_jail_run)
     parser.add_argument('image', type=str)
     parser.add_argument('--command', '-c', type=str, default='/bin/sh')
 
+    # volume
+    subparsers = subparsers_top.add_parser('volume').add_subparsers()
+    parser = subparsers.add_parser('create')
+    parser.set_defaults(func=command_volume_create)
+    parser.add_argument('--tag', '-t', type=str, nargs='+', default=[])
+
+    parser = subparsers.add_parser('prune')
+    parser.set_defaults(func=command_volume_prune)
+
+    parser = subparsers.add_parser('list')
+    parser.set_defaults(func=command_volume_list)
+
+    parser = subparsers.add_parser('tag')
+    parser.set_defaults(func=command_volume_tag)
+    parser.add_argument('tags', type=str, nargs='+')
+
+    parser = subparsers.add_parser('untag')
+    parser.set_defaults(func=command_volume_untag)
+    parser.add_argument('tags', type=str, nargs='+')
+
     return parser_top
 
 
diff --git a/volume.py b/volume.py
new file mode 100644
index 0000000..ca0c93b
--- /dev/null
+++ b/volume.py
@@ -0,0 +1,18 @@
+def command_volume_create(args):
+    raise NotImplementedError
+
+
+def command_volume_prune(args):
+    raise NotImplementedError
+
+
+def command_volume_list(args):
+    raise NotImplementedError
+
+
+def command_volume_tag(args):
+    raise NotImplementedError
+
+
+def command_volume_untag(args):
+    raise NotImplementedError