ARIA multivim plugin initial checkin

Change-Id: I3a24ab6fc5ba54466bfecaf596a13b8907248ae8
Issue-id: SO-77
Signed-off-by: DeWayne Filppi <dewayne@gigaspaces.com>

1 files changed, 202 insertions, 0 deletions

diff --git a/aria/multivim-plugin/nova_plugin/keypair.py b/aria/multivim-plugin/nova_plugin/keypair.py
new file mode 100644
index 0000000000..92281ab9e5
--- /dev/null
+++ b/aria/multivim-plugin/nova_plugin/keypair.py
@@ -0,0 +1,202 @@
+#########
+# Copyright (c) 2014 GigaSpaces Technologies Ltd. All rights reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+#  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  * See the License for the specific language governing permissions and
+#  * limitations under the License.
+
+import os
+import errno
+from getpass import getuser
+
+from cloudify import ctx
+from cloudify.decorators import operation
+from cloudify.exceptions import NonRecoverableError
+from openstack_plugin_common import (
+    with_nova_client,
+    validate_resource,
+    use_external_resource,
+    transform_resource_name,
+    is_external_resource,
+    is_external_resource_not_conditionally_created,
+    delete_runtime_properties,
+    get_resource_id,
+    delete_resource_and_runtime_properties,
+    OPENSTACK_ID_PROPERTY,
+    OPENSTACK_TYPE_PROPERTY,
+    OPENSTACK_NAME_PROPERTY,
+    COMMON_RUNTIME_PROPERTIES_KEYS
+)
+
+RUNTIME_PROPERTIES_KEYS = COMMON_RUNTIME_PROPERTIES_KEYS
+KEYPAIR_OPENSTACK_TYPE = 'keypair'
+
+PRIVATE_KEY_PATH_PROP = 'private_key_path'
+
+
+@operation
+@with_nova_client
+def create(nova_client, args, **kwargs):
+
+    private_key_path = _get_private_key_path()
+    pk_exists = _check_private_key_exists(private_key_path)
+
+    if use_external_resource(ctx, nova_client, KEYPAIR_OPENSTACK_TYPE):
+        if not pk_exists:
+            delete_runtime_properties(ctx, RUNTIME_PROPERTIES_KEYS)
+            raise NonRecoverableError(
+                'Failed to use external keypair (node {0}): the public key {1}'
+                ' is available on Openstack, but the private key could not be '
+                'found at {2}'.format(ctx.node.id,
+                                      ctx.node.properties['resource_id'],
+                                      private_key_path))
+        return
+
+    if pk_exists:
+        raise NonRecoverableError(
+            "Can't create keypair - private key path already exists: {0}"
+            .format(private_key_path))
+
+    keypair = {
+        'name': get_resource_id(ctx, KEYPAIR_OPENSTACK_TYPE),
+    }
+    keypair.update(ctx.node.properties['keypair'], **args)
+    transform_resource_name(ctx, keypair)
+
+    keypair = nova_client.keypairs.create(keypair['name'],
+                                          keypair.get('public_key'))
+    ctx.instance.runtime_properties[OPENSTACK_ID_PROPERTY] = keypair.id
+    ctx.instance.runtime_properties[OPENSTACK_TYPE_PROPERTY] = \
+        KEYPAIR_OPENSTACK_TYPE
+    ctx.instance.runtime_properties[OPENSTACK_NAME_PROPERTY] = keypair.name
+
+    try:
+        # write private key file
+        _mkdir_p(os.path.dirname(private_key_path))
+        with open(private_key_path, 'w') as f:
+            f.write(keypair.private_key)
+        os.chmod(private_key_path, 0600)
+    except Exception:
+        _delete_private_key_file()
+        delete_resource_and_runtime_properties(ctx, nova_client,
+                                               RUNTIME_PROPERTIES_KEYS)
+        raise
+
+
+@operation
+@with_nova_client
+def delete(nova_client, **kwargs):
+    if not is_external_resource(ctx):
+        ctx.logger.info('deleting keypair')
+
+        _delete_private_key_file()
+
+        nova_client.keypairs.delete(
+            ctx.instance.runtime_properties[OPENSTACK_ID_PROPERTY])
+    else:
+        ctx.logger.info('not deleting keypair since an external keypair is '
+                        'being used')
+
+    delete_runtime_properties(ctx, RUNTIME_PROPERTIES_KEYS)
+
+
+@operation
+@with_nova_client
+def creation_validation(nova_client, **kwargs):
+
+    def validate_private_key_permissions(private_key_path):
+        ctx.logger.debug('checking whether private key file {0} has the '
+                         'correct permissions'.format(private_key_path))
+        if not os.access(private_key_path, os.R_OK):
+            err = 'private key file {0} is not readable'\
+                .format(private_key_path)
+            ctx.logger.error('VALIDATION ERROR: ' + err)
+            raise NonRecoverableError(err)
+        ctx.logger.debug('OK: private key file {0} has the correct '
+                         'permissions'.format(private_key_path))
+
+    def validate_path_owner(path):
+        ctx.logger.debug('checking whether directory {0} is owned by the '
+                         'current user'.format(path))
+        from pwd import getpwnam, getpwuid
+
+        user = getuser()
+        owner = getpwuid(os.stat(path).st_uid).pw_name
+        current_user_id = str(getpwnam(user).pw_uid)
+        owner_id = str(os.stat(path).st_uid)
+
+        if not current_user_id == owner_id:
+            err = '{0} is not owned by the current user (it is owned by {1})'\
+                  .format(path, owner)
+            ctx.logger.warning('VALIDATION WARNING: {0}'.format(err))
+            return
+        ctx.logger.debug('OK: {0} is owned by the current user'.format(path))
+
+    validate_resource(ctx, nova_client, KEYPAIR_OPENSTACK_TYPE)
+
+    private_key_path = _get_private_key_path()
+    pk_exists = _check_private_key_exists(private_key_path)
+
+    if is_external_resource_not_conditionally_created(ctx):
+        if pk_exists:
+            if os.name == 'posix':
+                validate_private_key_permissions(private_key_path)
+                validate_path_owner(private_key_path)
+        else:
+            err = "can't use external keypair: the public key {0} is " \
+                  "available on Openstack, but the private key could not be " \
+                  "found at {1}".format(ctx.node.properties['resource_id'],
+                                        private_key_path)
+            ctx.logger.error('VALIDATION ERROR: {0}'.format(err))
+            raise NonRecoverableError(err)
+    else:
+        if pk_exists:
+            err = 'private key path already exists: {0}'.format(
+                private_key_path)
+            ctx.logger.error('VALIDATION ERROR: {0}'.format(err))
+            raise NonRecoverableError(err)
+        else:
+            err = 'private key directory {0} is not writable'
+            while private_key_path:
+                if os.path.isdir(private_key_path):
+                    if not os.access(private_key_path, os.W_OK | os.X_OK):
+                        raise NonRecoverableError(err.format(private_key_path))
+                    else:
+                        break
+                private_key_path, _ = os.path.split(private_key_path)
+
+    ctx.logger.debug('OK: keypair configuration is valid')
+
+
+def _get_private_key_path():
+    return os.path.expanduser(ctx.node.properties[PRIVATE_KEY_PATH_PROP])
+
+
+def _delete_private_key_file():
+    private_key_path = _get_private_key_path()
+    ctx.logger.debug('deleting private key file at {0}'.format(
+        private_key_path))
+    try:
+        os.remove(private_key_path)
+    except OSError as e:
+        if e.errno == errno.ENOENT:
+            # file was already deleted somehow
+            pass
+        raise
+
+
+def _check_private_key_exists(private_key_path):
+    return os.path.isfile(private_key_path)
+
+
+def _mkdir_p(path):
+    if path and not os.path.isdir(path):
+        os.makedirs(path)