cmdline: add collect-logs subcommand.

Add a new collect-logs sub command to the cloud-init CLI. This script
will collect all logs pertinent to a cloud-init run and store them in a
compressed tar-gzipped file. This tarfile can be attached to any
cloud-init bug filed in order to aid in bug triage and resolution.

A cloudinit.apport module is also added that allows apport interaction.
Here is an example bug filed via ubuntu-bug cloud-init: LP: #1716975.

Once the apport launcher is packaged in cloud-init, bugs can be filed
against cloud-init with the following command:
  ubuntu-bug cloud-init

LP: #1607345

2 files changed, 120 insertions, 0 deletions

diff --git a/cloudinit/cmd/devel/tests/__init__.py b/cloudinit/cmd/devel/tests/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/cloudinit/cmd/devel/tests/__init__.py
diff --git a/cloudinit/cmd/devel/tests/test_logs.py b/cloudinit/cmd/devel/tests/test_logs.py
new file mode 100644
index 00000000..dc4947cc
--- /dev/null
+++ b/cloudinit/cmd/devel/tests/test_logs.py
@@ -0,0 +1,120 @@
+# This file is part of cloud-init. See LICENSE file for license information.
+
+from cloudinit.cmd.devel import logs
+from cloudinit.util import ensure_dir, load_file, subp, write_file
+from cloudinit.tests.helpers import FilesystemMockingTestCase, wrap_and_call
+from datetime import datetime
+import os
+
+
+class TestCollectLogs(FilesystemMockingTestCase):
+
+    def setUp(self):
+        super(TestCollectLogs, self).setUp()
+        self.new_root = self.tmp_dir()
+        self.run_dir = self.tmp_path('run', self.new_root)
+
+    def test_collect_logs_creates_tarfile(self):
+        """collect-logs creates a tarfile with all related cloud-init info."""
+        log1 = self.tmp_path('cloud-init.log', self.new_root)
+        write_file(log1, 'cloud-init-log')
+        log2 = self.tmp_path('cloud-init-output.log', self.new_root)
+        write_file(log2, 'cloud-init-output-log')
+        ensure_dir(self.run_dir)
+        write_file(self.tmp_path('results.json', self.run_dir), 'results')
+        output_tarfile = self.tmp_path('logs.tgz')
+
+        date = datetime.utcnow().date().strftime('%Y-%m-%d')
+        date_logdir = 'cloud-init-logs-{0}'.format(date)
+
+        expected_subp = {
+            ('dpkg-query', '--show', "-f=${Version}\n", 'cloud-init'):
+                '0.7fake\n',
+            ('dmesg',): 'dmesg-out\n',
+            ('journalctl', '-o', 'short-precise'): 'journal-out\n',
+            ('tar', 'czvf', output_tarfile, date_logdir): ''
+        }
+
+        def fake_subp(cmd):
+            cmd_tuple = tuple(cmd)
+            if cmd_tuple not in expected_subp:
+                raise AssertionError(
+                    'Unexpected command provided to subp: {0}'.format(cmd))
+            if cmd == ['tar', 'czvf', output_tarfile, date_logdir]:
+                subp(cmd)  # Pass through tar cmd so we can check output
+            return expected_subp[cmd_tuple], ''
+
+        wrap_and_call(
+            'cloudinit.cmd.devel.logs',
+            {'subp': {'side_effect': fake_subp},
+             'CLOUDINIT_LOGS': {'new': [log1, log2]},
+             'CLOUDINIT_RUN_DIR': {'new': self.run_dir}},
+            logs.collect_logs, output_tarfile, include_userdata=False)
+        # unpack the tarfile and check file contents
+        subp(['tar', 'zxvf', output_tarfile, '-C', self.new_root])
+        out_logdir = self.tmp_path(date_logdir, self.new_root)
+        self.assertEqual(
+            '0.7fake\n',
+            load_file(os.path.join(out_logdir, 'version')))
+        self.assertEqual(
+            'cloud-init-log',
+            load_file(os.path.join(out_logdir, 'cloud-init.log')))
+        self.assertEqual(
+            'cloud-init-output-log',
+            load_file(os.path.join(out_logdir, 'cloud-init-output.log')))
+        self.assertEqual(
+            'dmesg-out\n',
+            load_file(os.path.join(out_logdir, 'dmesg.txt')))
+        self.assertEqual(
+            'journal-out\n',
+            load_file(os.path.join(out_logdir, 'journal.txt')))
+        self.assertEqual(
+            'results',
+            load_file(
+                os.path.join(out_logdir, 'run', 'cloud-init', 'results.json')))
+
+    def test_collect_logs_includes_optional_userdata(self):
+        """collect-logs include userdata when --include-userdata is set."""
+        log1 = self.tmp_path('cloud-init.log', self.new_root)
+        write_file(log1, 'cloud-init-log')
+        log2 = self.tmp_path('cloud-init-output.log', self.new_root)
+        write_file(log2, 'cloud-init-output-log')
+        userdata = self.tmp_path('user-data.txt', self.new_root)
+        write_file(userdata, 'user-data')
+        ensure_dir(self.run_dir)
+        write_file(self.tmp_path('results.json', self.run_dir), 'results')
+        output_tarfile = self.tmp_path('logs.tgz')
+
+        date = datetime.utcnow().date().strftime('%Y-%m-%d')
+        date_logdir = 'cloud-init-logs-{0}'.format(date)
+
+        expected_subp = {
+            ('dpkg-query', '--show', "-f=${Version}\n", 'cloud-init'):
+                '0.7fake',
+            ('dmesg',): 'dmesg-out\n',
+            ('journalctl', '-o', 'short-precise'): 'journal-out\n',
+            ('tar', 'czvf', output_tarfile, date_logdir): ''
+        }
+
+        def fake_subp(cmd):
+            cmd_tuple = tuple(cmd)
+            if cmd_tuple not in expected_subp:
+                raise AssertionError(
+                    'Unexpected command provided to subp: {0}'.format(cmd))
+            if cmd == ['tar', 'czvf', output_tarfile, date_logdir]:
+                subp(cmd)  # Pass through tar cmd so we can check output
+            return expected_subp[cmd_tuple], ''
+
+        wrap_and_call(
+            'cloudinit.cmd.devel.logs',
+            {'subp': {'side_effect': fake_subp},
+             'CLOUDINIT_LOGS': {'new': [log1, log2]},
+             'CLOUDINIT_RUN_DIR': {'new': self.run_dir},
+             'USER_DATA_FILE': {'new': userdata}},
+            logs.collect_logs, output_tarfile, include_userdata=True)
+        # unpack the tarfile and check file contents
+        subp(['tar', 'zxvf', output_tarfile, '-C', self.new_root])
+        out_logdir = self.tmp_path(date_logdir, self.new_root)
+        self.assertEqual(
+            'user-data',
+            load_file(os.path.join(out_logdir, 'user-data.txt')))