Added SmartOS datasource and unit tests.

3 files changed, 191 insertions, 0 deletions

diff --git a/cloudinit/settings.py b/cloudinit/settings.py
index dc371cd2..9f6badae 100644
--- a/cloudinit/settings.py
+++ b/cloudinit/settings.py
@@ -37,6 +37,7 @@ CFG_BUILTIN = {
         'MAAS',
         'Ec2',
         'CloudStack',
+        'SmartOS',
         # At the end to act as a 'catch' when none of the above work...
         'None',
     ],
diff --git a/cloudinit/sources/DataSourceSmartOS.py b/cloudinit/sources/DataSourceSmartOS.py
new file mode 100644
index 00000000..f9b724eb
--- /dev/null
+++ b/cloudinit/sources/DataSourceSmartOS.py
@@ -0,0 +1,172 @@
+# vi: ts=4 expandtab
+#
+#    Copyright (C) 2013 Canonical Ltd.
+#
+#    Author: Ben Howard <ben.howard@canonical.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License version 3, as
+#    published by the Free Software Foundation.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#
+#    Datasource for provisioning on SmartOS. This works on Joyent
+#        and public/private Clouds using SmartOS.
+#
+#    SmartOS hosts use a serial console (/dev/ttyS1) on Linux Guests.
+#        The meta-data is transmitted via key/value pairs made by
+#        requests on the console. For example, to get the hostname, you
+#        would send "GET hostname" on /dev/ttyS1.
+#
+
+
+import os
+import os.path
+import serial
+from cloudinit import log as logging
+from cloudinit import sources
+from cloudinit import util
+
+
+TTY_LOC = '/dev/ttyS1'
+LOG = logging.getLogger(__name__)
+
+
+class DataSourceSmartOS(sources.DataSource):
+    def __init__(self, sys_cfg, distro, paths):
+        sources.DataSource.__init__(self, sys_cfg, distro, paths)
+        self.seed_dir = os.path.join(paths.seed_dir, 'sdc')
+        self.seed = None
+        self.is_smartdc = None
+
+    def __str__(self):
+        root = sources.DataSource.__str__(self)
+        return "%s [seed=%s]" % (root, self.seed)
+
+    def get_data(self):
+        md = {}
+        ud = ""
+
+        if not os.path.exists(TTY_LOC):
+            LOG.debug("Host does not appear to be on SmartOS")
+            return False
+        self.seed = TTY_LOC
+
+        system_uuid, system_type = dmi_data()
+        if 'smartdc' not in system_type.lower():
+            LOG.debug("Host is not on SmartOS")
+            return False
+        self.is_smartdc = True
+
+        hostname = query_data("hostname", strip=True)
+        if not hostname:
+            hostname = system_uuid
+
+        md['local-hostname'] = hostname
+        md['instance-id'] = system_uuid
+        md['public-keys'] = query_data("root_authorized_keys", strip=True)
+        ud = query_data("user-script")
+        md['iptables_disable'] = query_data("disable_iptables_flag",
+                                            strip=True)
+        md['motd_sys_info'] = query_data("enable_motd_sys_info", strip=True)
+
+        self.metadata = md
+        self.userdata_raw = ud
+        return True
+
+    def get_instance_id(self):
+        return self.metadata['instance-id']
+
+
+def get_serial():
+    """This is replaced in unit testing, allowing us to replace
+        serial.Serial with a mocked class"""
+    return serial.Serial()
+
+
+def query_data(noun, strip=False):
+    """Makes a request to via the serial console via "GET <NOUN>"
+
+        In the response, the first line is the status, while subsequent lines
+        are is the value. A blank line with a "." is used to indicate end of
+        response.
+
+        The timeout value of 60 seconds should never be hit. The value
+        is taken from SmartOS own provisioning tools. Since we are reading
+        each line individually up until the single ".", the transfer is
+        usually very fast (i.e. microseconds) to get the response.
+     """
+    if not noun:
+        return False
+
+    ser = get_serial()
+    ser.port = '/dev/ttyS1'
+    ser.open()
+    if not ser.isOpen():
+        LOG.debug("Serial console is not open")
+        return False
+
+    ser.write("GET %s\n" % noun.rstrip())
+    status = str(ser.readline()).rstrip()
+    response = []
+    eom_found = False
+
+    if 'SUCCESS' not in status:
+        ser.close()
+        return None
+
+    while not eom_found:
+        m = ser.readline()
+        if m.rstrip() == ".":
+            eom_found = True
+        else:
+            response.append(m)
+
+    ser.close()
+    if not strip:
+        return "".join(response)
+    else:
+        return "".join(response).rstrip()
+
+    return None
+
+
+def dmi_data():
+    sys_uuid, sys_type = None, None
+    dmidecode_path = util.which('dmidecode')
+    if not dmidecode_path:
+        return False
+
+    sys_uuid_cmd = [dmidecode_path, "-s", "system-uuid"]
+    try:
+        LOG.debug("Getting hostname from dmidecode")
+        (sys_uuid, _err) = util.subp(sys_uuid_cmd)
+    except Exception as e:
+        util.logexc(LOG, "Failed to get system UUID", e)
+
+    sys_type_cmd = [dmidecode_path, "-s", "system-product-name"]
+    try:
+        LOG.debug("Determining hypervisor product name via dmidecode")
+        (sys_type, _err) = util.subp(sys_type_cmd)
+    except Exception as e:
+        util.logexc(LOG, "Failed to get system UUID", e)
+
+    return sys_uuid.lower(), sys_type
+
+
+# Used to match classes to dependencies
+datasources = [
+    (DataSourceSmartOS, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
+]
+
+
+# Return a list of data sources that match this set of dependencies
+def get_datasource_list(depends):
+    return sources.list_from_depends(depends, datasources)
diff --git a/cloudinit/util.py b/cloudinit/util.py
index c45aae06..7163225f 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -1743,3 +1743,21 @@ def get_mount_info(path, log=LOG):
     mountinfo_path = '/proc/%s/mountinfo' % os.getpid()
     lines = load_file(mountinfo_path).splitlines()
     return parse_mount_info(path, lines, log)
+
+def which(program):
+    # Return path of program for execution if found in path
+    def is_exe(fpath):
+        return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+    fpath, fname = os.path.split(program)
+    if fpath:
+        if is_exe(program):
+            return program
+    else:
+        for path in os.environ["PATH"].split(os.pathsep):
+            path = path.strip('"')
+            exe_file = os.path.join(path, program)
+            if is_exe(exe_file):
+                return exe_file
+
+    return None