Merge "Trove add support for log retrieval"

releasenotes/notes/logging-support-f999a1b1b342eb4d.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Added support for logging features in the dashboard.
+    This includes listing logs that can be retrieved and
+    viewing, publishing and stop collection of log contents.

trove_dashboard/api/trove.py

@@ -297,3 +297,31 @@ def datastore_list(request):
 
 def datastore_version_list(request, datastore):
     return troveclient(request).datastore_versions.list(datastore)
+
+
+def log_list(request, instance_id):
+    return troveclient(request).instances.log_list(instance_id)
+
+
+def log_enable(request, instance_id, log_name):
+    return troveclient(request).instances.log_enable(instance_id, log_name)
+
+
+def log_disable(request, instance_id, log_name):
+    return troveclient(request).instances.log_disable(instance_id, log_name)
+
+
+def log_publish(request, instance_id, log_name):
+    return troveclient(request).instances.log_publish(instance_id, log_name)
+
+
+def log_discard(request, instance_id, log_name):
+    return troveclient(request).instances.log_discard(instance_id, log_name)
+
+
+def log_tail(request, instance_id, log_name, publish, lines, swift=None):
+    return troveclient(request).instances.log_generator(instance_id,
+                                                        log_name,
+                                                        publish=publish,
+                                                        lines=lines,
+                                                        swift=swift)

trove_dashboard/content/databases/logs/tables.py

@@ -0,0 +1,156 @@
+# Copyright 2016 Tesora Inc.
+#
+#    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.
+
+from django.core import urlresolvers
+from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import ungettext_lazy
+
+from horizon import tables
+
+from trove_dashboard import api
+
+
+class PublishLog(tables.BatchAction):
+    @staticmethod
+    def action_present(count):
+        return ungettext_lazy(
+            u"Publish Log",
+            u"Publish Logs",
+            count
+        )
+
+    @staticmethod
+    def action_past(count):
+        return ungettext_lazy(
+            u"Published Log",
+            u"Published Logs",
+            count
+        )
+
+    name = "publish_log"
+
+    def action(self, request, obj_id):
+        instance_id = self.table.kwargs['instance_id']
+        api.trove.log_publish(request, instance_id, obj_id)
+
+
+class DiscardLog(tables.BatchAction):
+    @staticmethod
+    def action_present(count):
+        return ungettext_lazy(
+            u"Discard Log",
+            u"Discard Logs",
+            count
+        )
+
+    @staticmethod
+    def action_past(count):
+        return ungettext_lazy(
+            u"Discarded Log",
+            u"Discarded Logs",
+            count
+        )
+
+    name = "discard_log"
+
+    def action(self, request, obj_id):
+        instance_id = self.table.kwargs['instance_id']
+        api.trove.log_discard(request, instance_id, obj_id)
+
+
+class EnableLog(tables.BatchAction):
+    @staticmethod
+    def action_present(count):
+        return ungettext_lazy(
+            u"Enable Log",
+            u"Enable Logs",
+            count
+        )
+
+    @staticmethod
+    def action_past(count):
+        return ungettext_lazy(
+            u"Enabled Log",
+            u"Enabled Logs",
+            count
+        )
+
+    name = "enable_log"
+
+    def action(self, request, obj_id):
+        instance_id = self.table.kwargs['instance_id']
+        api.trove.log_enable(request, instance_id, obj_id)
+
+
+class DisableLog(tables.BatchAction):
+    @staticmethod
+    def action_present(count):
+        return ungettext_lazy(
+            u"Disable Log",
+            u"Disable Logs",
+            count
+        )
+
+    @staticmethod
+    def action_past(count):
+        return ungettext_lazy(
+            u"Disabled Log",
+            u"Disabled Logs",
+            count
+        )
+
+    name = "disable_log"
+
+    def action(self, request, obj_id):
+        instance_id = self.table.kwargs['instance_id']
+        api.trove.log_disable(request, instance_id, obj_id)
+
+    def allowed(self, request, datum=None):
+        if datum:
+            return datum.type != "SYS"
+        return False
+
+
+class ViewLog(tables.LinkAction):
+    name = "view_log"
+    verbose_name = _("View Log")
+    url = "horizon:project:databases:logs:log_contents"
+
+    def get_link_url(self, datum):
+        instance_id = self.table.kwargs['instance_id']
+        return urlresolvers.reverse(self.url,
+                                    args=(instance_id,
+                                          datum.name))
+
+    def allowed(self, request, datum=None):
+        if datum:
+            return datum.published > 0
+        return False
+
+
+class LogsTable(tables.DataTable):
+    name = tables.Column('name', verbose_name=_('Name'))
+    type = tables.Column('type', verbose_name=_("Type"))
+    status = tables.Column('status', verbose_name=_("Status"))
+    published = tables.Column('published', verbose_name=_('Published (bytes)'))
+    pending = tables.Column('pending', verbose_name=_('Publishable (bytes)'))
+    container = tables.Column('container', verbose_name=_('Container'))
+
+    class Meta(object):
+        name = "logs"
+        verbose_name = _("Logs")
+        row_actions = (ViewLog, PublishLog, EnableLog, DisableLog, DiscardLog)
+
+    def get_object_id(self, datum):
+        return datum.name

trove_dashboard/content/databases/logs/tests.py

@@ -0,0 +1,361 @@
+# Copyright 2016 Tesora Inc.
+#
+#    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 logging
+
+from django.core.urlresolvers import reverse
+from django import http
+
+from mox3 import mox
+from mox3.mox import IsA  # noqa
+import six
+
+from trove_dashboard import api
+from trove_dashboard.test import helpers as test
+
+from swiftclient import client as swift_client
+
+LINES = 50
+
+
+class LogsTests(test.TestCase):
+    def stub_swiftclient(self, expected_calls=1):
+        if not hasattr(self, "swiftclient"):
+            self.mox.StubOutWithMock(swift_client, 'Connection')
+            self.swiftclient = self.mox.CreateMock(swift_client.Connection)
+            while expected_calls:
+                (swift_client.Connection(None,
+                                         mox.IgnoreArg(),
+                                         None,
+                                         preauthtoken=mox.IgnoreArg(),
+                                         preauthurl=mox.IgnoreArg(),
+                                         cacert=None,
+                                         insecure=False,
+                                         auth_version="2.0")
+                 .AndReturn(self.swiftclient))
+                expected_calls -= 1
+        return self.swiftclient
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'root_show')})
+    def test_log_tab(self):
+        database = self.databases.first()
+        database_id = database.id
+
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.root_show(IsA(http.HttpRequest), database.id)
+            .AndReturn(self.database_user_roots.first()))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        res = self.client.get(url)
+        table_data = res.context['logs_table'].data
+        self.assertItemsEqual(self.logs.list(), table_data)
+        self.assertTemplateUsed(
+            res, 'horizon/common/_detail_table.html')
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'root_show')})
+    def test_log_tab_exception(self):
+        database = self.databases.first()
+        database_id = database.id
+
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndRaise(self.exceptions.trove))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.root_show(IsA(http.HttpRequest), database.id)
+            .AndReturn(self.database_user_roots.first()))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+
+        toSuppress = ["trove_dashboard.content.databases.tabs"]
+
+        loggers = []
+        for cls in toSuppress:
+            logger = logging.getLogger(cls)
+            loggers.append((logger, logger.getEffectiveLevel()))
+            logger.setLevel(logging.CRITICAL)
+
+        try:
+            res = self.client.get(url)
+            table_data = res.context['logs_table'].data
+            self.assertNotEqual(len(self.logs.list()), len(table_data))
+            self.assertTemplateUsed(
+                res, 'horizon/common/_detail_table.html')
+        finally:
+            # Restore the previous log levels
+            for (log, level) in loggers:
+                log.setLevel(level)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_publish',)
+    })
+    def test_log_publish(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.first()
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_publish(IsA(http.HttpRequest), database_id, log.name)
+            .AndReturn(None))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('publish', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_publish',)
+    })
+    def test_log_publish_exception(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.first()
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_publish(IsA(http.HttpRequest), database_id, log.name)
+            .AndRaise(self.exceptions.trove))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('publish', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_enable',)
+    })
+    def test_log_enable(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.first()
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_enable(IsA(http.HttpRequest), database_id, log.name)
+            .AndReturn(None))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('enable', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_enable',)
+    })
+    def test_log_enable_exception(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.first()
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_enable(IsA(http.HttpRequest), database_id, log.name)
+            .AndRaise(self.exceptions.trove))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('enable', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_discard',)
+    })
+    def test_log_discard(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.first()
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_discard(IsA(http.HttpRequest), database_id, log.name)
+            .AndReturn(None))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('discard', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_discard',)
+    })
+    def test_log_discard_exception(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.first()
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_discard(IsA(http.HttpRequest), database_id, log.name)
+            .AndRaise(self.exceptions.trove))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('discard', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_disable',)
+    })
+    def test_log_disable(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.list()[3]
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_disable(IsA(http.HttpRequest), database_id, log.name)
+            .AndReturn(None))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('disable', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({
+        api.trove: ('flavor_get', 'instance_get', 'log_list', 'log_disable',)
+    })
+    def test_log_disable_exception(self):
+        database = self.databases.first()
+        database_id = database.id
+        log = self.logs.list()[3]
+        (api.trove.instance_get(IsA(http.HttpRequest), IsA(six.text_type))
+            .AndReturn(database))
+        (api.trove.log_list(IsA(http.HttpRequest), database_id)
+            .AndReturn(self.logs.list()))
+        (api.trove.flavor_get(IsA(http.HttpRequest), database.flavor["id"])
+            .AndReturn(self.flavors.first()))
+        (api.trove.log_disable(IsA(http.HttpRequest), database_id, log.name)
+            .AndRaise(self.exceptions.trove))
+
+        self.mox.ReplayAll()
+
+        detail_url = reverse('horizon:project:databases:detail',
+                             args=[database_id])
+        url = detail_url + '?tab=instance_details__logs_tab'
+        action_string = u"logs__%s_log__%s" % ('disable', log.name)
+        form_data = {'action': action_string}
+        res = self.client.post(url, form_data)
+        self.assertRedirectsNoFollow(res, url)
+
+    @test.create_stubs({api.trove: ('log_tail',)})
+    def test_view_log(self):
+        CONSOLE_OUTPUT = 'superspecialuniquetext'
+        (api.trove.log_tail(IsA(http.HttpRequest),
+                            IsA(six.string_types),
+                            'guest.log',
+                            False,
+                            LINES,
+                            self.stub_swiftclient())
+         .AndReturn(lambda: [CONSOLE_OUTPUT]))
+
+        self.mox.ReplayAll()
+
+        url = reverse('horizon:project:databases:logs:log_contents',
+                      args=('id', 'guest.log'))
+        res = self.client.get(url)
+
+        self.assertNoMessages()
+        self.assertIsInstance(res, http.HttpResponse)
+        self.assertContains(res, CONSOLE_OUTPUT)
+
+    @test.create_stubs({api.trove: ('log_tail',)})
+    def test_view_log_exception(self):
+        (api.trove.log_tail(IsA(http.HttpRequest),
+                            IsA(six.string_types),
+                            'guest.log',
+                            False,
+                            LINES,
+                            self.stub_swiftclient())
+         .AndRaise(self.exceptions.trove))
+
+        self.mox.ReplayAll()
+
+        url = reverse('horizon:project:databases:logs:log_contents',
+                      args=('id', 'guest.log'))
+        res = self.client.get(url)
+
+        self.assertContains(res, "Unable to load")

trove_dashboard/content/databases/logs/urls.py

@@ -0,0 +1,32 @@
+# Copyright 2016 Tesora Inc.
+#
+#    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.
+
+from django.conf.urls import patterns
+from django.conf.urls import url
+
+from trove_dashboard.content.databases.logs import views
+
+
+VIEWS_MOD = ('trove_dashboard.content.databases.logs.views')
+
+LOGS = r'^(?P<filename>[^/]+)/%s$'
+
+urlpatterns = patterns(
+    VIEWS_MOD,
+    url(LOGS % 'console', 'console', name='console'),
+    url(LOGS % 'download_log', 'download_log', name='download_log'),
+    url(LOGS % 'full_log', 'full_log', name='full_log'),
+    url(LOGS % 'log_contents',
+        views.LogContentsView.as_view(), name='log_contents'),
+)

trove_dashboard/content/databases/logs/views.py

@@ -0,0 +1,129 @@
+# Copyright 2016 Tesora Inc.
+#
+#    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.
+
+from django import http
+from django import shortcuts
+from django.utils.translation import ugettext_lazy as _
+from django.views import generic
+
+from horizon import exceptions
+from horizon import messages
+
+from openstack_dashboard import api as dash_api
+from trove_dashboard import api
+
+FULL_LOG_VALUE = 0
+DEFAULT_LINES = 50
+
+
+class LogContentsView(generic.TemplateView):
+    template_name = 'project/databases/logs/view_log.html'
+    preload = False
+
+    def get_context_data(self, **kwargs):
+        context = super(LogContentsView, self).get_context_data(**kwargs)
+        context["instance_id"] = kwargs['instance_id']
+        context["filename"] = kwargs['filename']
+        context["publish"] = ''
+
+        try:
+            log_length = int(kwargs['lines'])
+        except Exception:
+            log_length = DEFAULT_LINES
+
+        context["log_length"] = log_length
+        context["log_contents"] = get_contents(self.request,
+                                               kwargs['instance_id'],
+                                               kwargs['filename'],
+                                               False,
+                                               log_length)
+        return context
+
+
+def get_contents(request, instance_id, filename, publish, lines):
+    try:
+        log_generator = api.trove.log_tail(request,
+                                           instance_id,
+                                           filename,
+                                           publish,
+                                           lines,
+                                           dash_api.swift.swift_api(request))
+        data = ""
+        for log_part in log_generator():
+            data += log_part
+    except Exception as e:
+        data = _('Unable to load {0} log\n{1}').format(filename, e.message)
+    return data
+
+
+def build_response(request, instance_id, filename, tail):
+    data = (_('Unable to load {0} log for instance "{1}".')
+            .format(filename, instance_id))
+
+    if request.GET.get('publish'):
+        publish = True
+    else:
+        publish = False
+
+    try:
+        data = get_contents(request,
+                            instance_id,
+                            filename,
+                            publish,
+                            int(tail))
+    except Exception:
+        exceptions.handle(request, ignore=True)
+    return http.HttpResponse(data.encode('utf-8'), content_type='text/plain')
+
+
+def console(request, instance_id, filename):
+    tail = request.GET.get('length')
+    if not tail or (tail and not tail.isdigit()):
+        msg = _('Log length must be a nonnegative integer.')
+        messages.warning(request, msg)
+        data = (_('Unable to load {0} log for instance "{1}".')
+                .format(filename, instance_id))
+        return http.HttpResponse(data.encode('utf-8'),
+                                 content_type='text/plain')
+
+    return build_response(request, instance_id, filename, tail)
+
+
+def full_log(request, instance_id, filename):
+    return build_response(request, instance_id, filename, FULL_LOG_VALUE)
+
+
+def download_log(request, instance_id, filename):
+    try:
+        publish_value = request.GET.get('publish')
+        if publish_value:
+            publish = True
+        else:
+            publish = False
+
+        data = get_contents(request,
+                            instance_id,
+                            filename,
+                            publish,
+                            FULL_LOG_VALUE)
+        response = http.HttpResponse()
+        response.write(data)
+        response['Content-Disposition'] = ('attachment; '
+                                           'filename="%s.log"' % filename)
+        response['Content-Length'] = str(len(response.content))
+        return response
+
+    except Exception as e:
+        messages.error(request, _('Error downloading log file: %s') % e)
+        return shortcuts.redirect(request.build_absolute_uri())

trove_dashboard/content/databases/tabs.py

@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import logging
+
 from django import template
 from django.utils.translation import ugettext_lazy as _
 
@@ -19,9 +21,13 @@ from horizon import exceptions
 from horizon import tabs
 from trove_dashboard import api
 from trove_dashboard.content.databases import db_capability
+from trove_dashboard.content.databases.logs import tables as log_tables
 from trove_dashboard.content.databases import tables
 
 
+LOG = logging.getLogger(__name__)
+
+
 class OverviewTab(tabs.Tab):
     name = _("Overview")
     slug = "overview"
@@ -136,7 +142,26 @@ class BackupsTab(tabs.TableTab):
         return request.user.has_perm('openstack.services.object-store')
 
 
+class LogsTab(tabs.TableTab):
+    table_classes = [log_tables.LogsTable]
+    name = _("Logs")
+    slug = "logs_tab"
+    template_name = "horizon/common/_detail_table.html"
+    preload = False
+
+    def get_logs_data(self):
+        instance = self.tab_group.kwargs['instance']
+        try:
+            logs = api.trove.log_list(self.request, instance.id)
+            return logs
+        except Exception as e:
+            LOG.exception(
+                _('Unable to retrieve list of logs.\n%s') % e.message)
+            logs = []
+        return logs
+
+
 class InstanceDetailTabs(tabs.TabGroup):
     slug = "instance_details"
-    tabs = (OverviewTab, UserTab, DatabaseTab, BackupsTab)
+    tabs = (OverviewTab, UserTab, DatabaseTab, BackupsTab, LogsTab)
     sticky = True

trove_dashboard/content/databases/templates/databases/logs/_detail_log.html

@@ -0,0 +1,22 @@
+{% load i18n %}
+{% load url from future %}
+
+<div class="col-sm-12">
+  <div class="clearfix">
+    <form id="tail_length" action="{% url 'horizon:project:databases:logs:console' instance_id filename %}" class="form-inline pull-right">
+      <label for="tail_length_select">{% trans "Log Length" %}</label>
+      <input class="span1" type="text" name="length" value="{{ log_length }}" />
+      <label for="publish_check">{% trans "Publish" %}</label>
+      <input type="checkbox" name="publish" value="publish" {{ publish }}>
+      <button class="btn btn-default btn-sm btn-primary always-enabled" type="submit">{% trans "Go" %}</button>
+      <a href="{% url 'horizon:project:databases:detail' instance_id %}" class="btn btn-default btn-sm pull-right secondary">{% trans "Return to Log List" %}</a>
+      <a href="{% url 'horizon:project:databases:logs:download_log' instance_id filename %}" class="btn btn-default btn-sm pull-right">{% trans "Download" %}</a>
+      <a href="{% url 'horizon:project:databases:logs:full_log' instance_id filename %}" class="btn btn-default btn-sm pull-right" target="_blank">{% trans "View Full Log" %}</a>
+    </form>
+  </div>
+  <br>
+
+  <pre class="logs">
+    {{ log_contents }}
+  </pre>
+</div>

trove_dashboard/content/databases/templates/databases/logs/_log_contents.html

@@ -0,0 +1,15 @@
+{% extends "horizon/common/_modal.html" %}
+{% load i18n %}
+{% load url from future %}
+
+{% block modal-header %}{% trans "Log Contents" %}{% endblock %}
+
+{% block modal-body %}
+<pre class="logs">
+  {{ log.data }}
+</pre>
+{% endblock %}
+
+{% block modal-footer %}
+  <a href="{% url 'horizon:project:databases:index' %}" class="btn btn-default secondary cancel close">{% trans "Close" %}</a>
+{% endblock %}

trove_dashboard/content/databases/templates/databases/logs/log_contents.html

@@ -0,0 +1,11 @@
+{% extends 'base.html' %}
+{% load i18n %}
+{% block title %}{% trans "Log Contents" %}{% endblock %}
+
+{% block main %}
+<div class="row-fluid">
+  <div class="col-sm-12">
+  {% include "project/databases/logs/_log_contents.html" %}
+  </div>
+</div>
+{% endblock %}

trove_dashboard/content/databases/templates/databases/logs/view_log.html

@@ -0,0 +1,11 @@
+{% extends 'base.html' %}
+{% load i18n %}
+{% block title %}{% trans "Log" %}{% endblock %}
+
+{% block page_header %}
+  {% include "horizon/common/_page_header.html" with title=_("Log: ")|add:filename %}
+{% endblock page_header %}
+
+{% block main %}
+  {% include "project/databases/logs/_detail_log.html" %}
+{% endblock %}

trove_dashboard/content/databases/urls.py

@@ -12,13 +12,15 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from django.conf.urls import include
 from django.conf.urls import patterns
 from django.conf.urls import url
 
+from trove_dashboard.content.databases.logs import urls as logs_urls
 from trove_dashboard.content.databases import views
 
-
+BASEINSTANCES = r'^(?P<instance_id>[^/]+)/%s'
-INSTANCES = r'^(?P<instance_id>[^/]+)/%s$'
+INSTANCES = BASEINSTANCES + '$'
 USERS = r'^(?P<instance_id>[^/]+)/(?P<user_name>[^/]+)/%s$'
 
 
@@ -44,4 +46,5 @@ urlpatterns = patterns(
         name='promote_to_replica_source'),
     url(INSTANCES % 'manage_root', views.ManageRootView.as_view(),
         name='manage_root'),
+    url(BASEINSTANCES % 'logs/', include(logs_urls, namespace='logs')),
 )

trove_dashboard/test/test_data/trove_data.py

@@ -367,6 +367,42 @@ VERSION_VERTICA_7_1 = {
     "id": "600a6d52-8347-4e00-8e4c-f4fa9cf96af1"
 }
 
+LOG_1 = {
+    "name": "guest",
+    "type": "SYS",
+    "status": "Partial",
+    "published": 5000,
+    "pending": 100,
+    "container": "guest_container"
+}
+
+LOG_2 = {
+    "name": "slow_query",
+    "type": "USER",
+    "status": "Disabled",
+    "published": 0,
+    "pending": 0,
+    "container": "None"
+}
+
+LOG_3 = {
+    "name": "error",
+    "type": "SYS",
+    "status": "Unavailable",
+    "published": 0,
+    "pending": 0,
+    "container": "None"
+}
+
+LOG_4 = {
+    "name": "general",
+    "type": "USER",
+    "status": "Ready",
+    "published": 0,
+    "pending": 1000,
+    "container": "None"
+}
+
 
 def data(TEST):
     cluster1 = clusters.Cluster(clusters.Clusters(None),
@@ -413,6 +449,11 @@ def data(TEST):
         DatastoreVersion(datastores.DatastoreVersions(None),
                          VERSION_VERTICA_7_1)
 
+    log1 = instances.DatastoreLog(instances.Instances(None), LOG_1)
+    log2 = instances.DatastoreLog(instances.Instances(None), LOG_2)
+    log3 = instances.DatastoreLog(instances.Instances(None), LOG_3)
+    log4 = instances.DatastoreLog(instances.Instances(None), LOG_4)
+
     TEST.trove_clusters = utils.TestDataContainer()
     TEST.trove_clusters.add(cluster1)
     TEST.trove_clusters.add(cluster2)
@@ -443,3 +484,6 @@ def data(TEST):
     TEST.datastore_versions.add(version_redis_3_0)
     TEST.datastore_versions.add(version_mongodb_2_6)
     TEST.datastore_versions.add(version1)
+
+    TEST.logs = utils.TestDataContainer()
+    TEST.logs.add(log1, log2, log3, log4)