Merge lp:~zulcss/charm-helpers/flex-support into lp:charm-helpers

[Chuck Short]

Add support for flex compute driver for openstack in juno.

Unmerged revisions

215. By Chuck Short on 2014-09-23

Add flex support for openstack

Add the flex containers support for openstack.

=== added file 'charmhelpers/contrib/openstack/flex.py'
--- charmhelpers/contrib/openstack/flex.py	1970-01-01 00:00:00 +0000
+++ charmhelpers/contrib/openstack/flex.py	2014-09-23 16:59:07 +0000
@@ -0,0 +1,104 @@
+#
+# Copyright 2014 Canonical Ltd.
+#
+# Authors:
+#  Chuck Short <[e-mail]>
+
+import os
+import shutil
+
+from subprocess import (
+    check_call,
+    check_output,
+    CalledProcessError
+)
+
+from charmhelpers.core.hookenv import (
+    config,
+    relation_get,
+    relation_ids,
+    related_units,
+    log,
+    INFO,
+    WARNING,
+    ERROR
+)
+
+from charmhelpers.core.host import (
+    mount,
+    mounts,
+    service_start,
+    service_stop,
+    service_running,
+    umount,
+)
+
+
+from charmhelpers.fetch import (
+    apt_install,
+    apt_update,
+)
+
+def configure_ppa():
+    cmd = [
+        'apt-add-repository',
+        '-y', 
+        'ppa:zulcss/flex-testing'
+    ]
+    check_call(cmd)
+    apt_update()
+
+def install_flex():
+    log('Configuring flex')
+
+    # This can be removed once in the archive
+    configure_ppa()
+
+def configure_flex():
+    flex_block_device = config('flex-block-device')
+    flex_mount_point = config('flex-mount-point')
+
+    instance_path = '/var/lib/nova/instances'
+    if config('instances-path') is not None:
+        instance_path = config('instances-path')
+
+    # configure the btrfs block device
+    apt_install('btrfs-tools', fatal=True)
+    if filesystem_mounted(flex_mount_point):
+        umount(flex_mount_point)
+
+    make_filesystem(flex_block_device)
+    mount(flex_block_device, instance_path, persist=True)
+    cmd = ['chown', 'nova:nova', instance_path]
+    check_call(cmd)
+
+    configure_flex_user()
+    cmd = ['chmod', '+x', instance_path]
+    check_call(cmd)
+    service_start('nova-compute')
+
+def configure_flex_user():
+     cmd = ['usermod', '--add-subuids', '100000-165536', 'nova']
+     check_call(cmd)
+     cmd = ['usermod', '--add-subgids', '100000-165536', 'nova']
+     check_call(cmd)
+
+def filesystem_mounted(fs):
+    return fs in [f for f, m in mounts()]
+
+def make_filesystem(blk_device, timeout=10):
+    count = 0
+    e_noent = os.errno.ENOENT
+    while not os.path.exists(blk_device):
+        if count >= timeout:
+            log('gave up waiting on block device %s' % blk_device,
+                level=ERROR)
+            raise IOError(e_noent, os.strerror(e_noent), blk_device)
+        log('waiting for block device %s to appear' % blk_device,
+            level=INFO)
+        count += 1
+        time.sleep(1)
+    else:
+        log('Formatting block device %s.' % blk_device, level=INFO)
+        check_call(['mkfs.btrfs', '-f', blk_device])
+