bigdata-dev team mailing list archive

[Cory Johns <cory.johns@xxxxxxxxxxxxx>]

Cory Johns has proposed merging lp:~bigdata-dev/charms/trusty/apache-hadoop-yarn-master/status into lp:~bigdata-dev/charms/trusty/apache-hadoop-yarn-master/trunk.

Requested reviews:
  Juju Big Data Development (bigdata-dev)

For more details, see:
https://code.launchpad.net/~bigdata-dev/charms/trusty/apache-hadoop-yarn-master/status/+merge/262923

Added extended status support.

Example status (tabular) outputs:

http://pastebin.ubuntu.com/11769979/ (in progress)
http://pastebin.ubuntu.com/11770196/ (complete)

Example status-history outputs:

http://pastebin.ubuntu.com/11770192/ (hdfs-master)
http://pastebin.ubuntu.com/11770195/ (compute-slave)
-- 
Your team Juju Big Data Development is requested to review the proposed merge of lp:~bigdata-dev/charms/trusty/apache-hadoop-yarn-master/status into lp:~bigdata-dev/charms/trusty/apache-hadoop-yarn-master/trunk.

=== modified file 'hooks/callbacks.py'
--- hooks/callbacks.py	2015-05-12 21:51:52 +0000
+++ hooks/callbacks.py	2015-06-24 22:19:52 +0000
@@ -15,3 +15,34 @@
 Add any additional tasks / setup here.  If a callback is used by mutliple
 charms, consider refactoring it up to the jujubigdata library.
 """
+
+from charmhelpers.core import hookenv
+from charmhelpers.core import unitdata
+from jujubigdata.relations import NameNode, NodeManager
+
+
+def update_blocked_status():
+    if unitdata.kv().get('charm.active', False):
+        return
+    if NameNode().connected_units():
+        hookenv.status_set('waiting', 'Waiting for HDFS master to provide NameNode'),
+    else:
+        hookenv.status_set('blocked', 'Waiting for relation to HDFS master'),
+
+
+def update_working_status():
+    if unitdata.kv().get('charm.active', False):
+        hookenv.status_set('maintenance', 'Updating configuration')
+        return
+    hookenv.status_set('maintenance', 'Setting up Yarn master')
+
+
+def update_active_status():
+    nodemanager = NodeManager()
+    if nodemanager.is_ready():
+        hookenv.status_set('active', 'Ready (%s NodeManagers)' % len(nodemanager.filtered_data()))
+        unitdata.kv().set('charm.active', True)
+    elif nodemanager.connected_units():
+        hookenv.status_set('waiting', 'Waiting for compute slaves to provide NodeManagers')
+    else:
+        hookenv.status_set('blocked', 'Waiting for relation to compute slaves')

=== modified file 'hooks/common.py'
--- hooks/common.py	2015-06-17 17:30:49 +0000
+++ hooks/common.py	2015-06-24 22:19:52 +0000
@@ -15,29 +15,39 @@
 """
 
 import jujuresources
+from charmhelpers.core import hookenv
+from charmhelpers.core import unitdata
+from charmhelpers.core import charmframework
 
 
 def bootstrap_resources():
     """
     Attempt to load and install resources defined in resources.yaml
     """
+    if unitdata.kv().get('charm.bootstrapped', False):
+        return True
+    hookenv.status_set('maintenance', 'Installing base resources')
     mirror_url = jujuresources.config_get('resources_mirror')
     if not jujuresources.fetch(mirror_url=mirror_url):
-        jujuresources.juju_log('Required resources unavailable; changing resources_mirror option is required', 'ERROR')
+        missing = jujuresources.invalid()
+        hookenv.status_set('blocked', 'Unable to fetch required resource%s: %s' % (
+            's' if len(missing) > 1 else '',
+            ', '.join(missing),
+        ))
         return False
-    jujuresources.install(['pathlib', 'pyaml', 'six', 'charmhelpers', 'jujubigdata'])
+    jujuresources.install(['pathlib', 'jujubigdata'])
+    unitdata.kv().set('charm.bootstrapped', True)
     return True
 
 
 def manage():
     if not bootstrap_resources():
-        # defer until resources are available, since charmhelpers, and thus
-        # the framework, are required (will require manual intervention)
+        # defer until resources are available, since jujubigdata, and thus the
+        # classes needed for the requires blocks, (will be) managed by jujuresources
         return
 
-    from charmhelpers.core import charmframework
     import jujubigdata
-    import callbacks  # noqa  (ignore when linting)
+    import callbacks
 
     # list of keys required to be in the dist.yaml
     yarn_reqs = ['vendor', 'hadoop_version', 'packages', 'groups',
@@ -60,6 +70,7 @@
             ],
             'callbacks': [
                 hadoop.install,
+                callbacks.update_blocked_status,
             ],
         },
         {
@@ -74,6 +85,11 @@
                 jujubigdata.relations.NodeManager(optional=True),
             ],
             'callbacks': [
+                # These callbacks will be executed once the Hadoop base packages
+                # are installed and HDFS is available.  New items can be added
+                # to the end of this list and to hooks/callbacks.py to extend
+                # the functionality of this charm.
+                callbacks.update_working_status,
                 nodemanagers.register_connected_hosts,
                 namenode.register_provided_hosts,
                 jujubigdata.utils.manage_etc_hosts,
@@ -84,6 +100,7 @@
                 yarn.start_resourcemanager,
                 yarn.start_jobhistory,
                 charmframework.helpers.open_ports(dist_config.exposed_ports('yarn-master')),
+                callbacks.update_active_status,
             ],
             'cleanup': [
                 charmframework.helpers.close_ports(dist_config.exposed_ports('yarn-master')),

=== modified file 'hooks/config-changed'
--- hooks/config-changed	2015-02-09 18:17:08 +0000
+++ hooks/config-changed	2015-06-24 22:19:52 +0000
@@ -11,5 +11,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'hooks/install'
--- hooks/install	2015-02-09 18:17:08 +0000
+++ hooks/install	2015-06-24 22:19:52 +0000
@@ -13,5 +13,16 @@
 import setup
 setup.pre_install()
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'hooks/namenode-relation-changed'
--- hooks/namenode-relation-changed	2015-05-12 21:51:52 +0000
+++ hooks/namenode-relation-changed	2015-06-24 22:19:52 +0000
@@ -11,5 +11,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'hooks/nodemanager-relation-changed'
--- hooks/nodemanager-relation-changed	2015-05-12 21:51:52 +0000
+++ hooks/nodemanager-relation-changed	2015-06-24 22:19:52 +0000
@@ -11,5 +11,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'hooks/resourcemanager-relation-changed'
--- hooks/resourcemanager-relation-changed	2015-05-19 16:28:14 +0000
+++ hooks/resourcemanager-relation-changed	2015-06-24 22:19:52 +0000
@@ -11,5 +11,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'hooks/setup.py'
--- hooks/setup.py	2015-03-03 21:31:05 +0000
+++ hooks/setup.py	2015-06-24 22:19:52 +0000
@@ -12,24 +12,22 @@
 import subprocess
 from glob import glob
 
+
 def pre_install():
     """
     Do any setup required before the install hook.
     """
     install_pip()
-    install_jujuresources()
+    install_bundled_resources()
 
 
 def install_pip():
     subprocess.check_call(['apt-get', 'install', '-yq', 'python-pip', 'bzr'])
 
 
-def install_jujuresources():
-    """
-    Install the bundled jujuresources library, if not present.
-    """
-    try:
-        import jujuresources  # noqa
-    except ImportError:
-        jr_archive = glob('resources/jujuresources-*.tar.gz')[0]
-        subprocess.check_call(['pip', 'install', jr_archive])
+def install_bundled_resources():
+    """
+    Install the bundled resources libraries.
+    """
+    archives = glob('resources/*')
+    subprocess.check_call(['pip', 'install'] + archives)

=== modified file 'hooks/start'
--- hooks/start	2015-02-09 18:17:08 +0000
+++ hooks/start	2015-06-24 22:19:52 +0000
@@ -11,5 +11,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'hooks/stop'
--- hooks/stop	2015-02-09 18:17:08 +0000
+++ hooks/stop	2015-06-24 22:19:52 +0000
@@ -11,5 +11,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""
+All hooks in this charm are managed by the Charm Framework.
+The framework helps manage dependencies and preconditions to ensure that
+steps are only executed when they can be successful.  As such, no additional
+code should be added to this hook; instead, please integrate new functionality
+into the 'callbacks' list in hooks/common.py.  New callbacks can be placed
+in hooks/callbacks.py, if necessary.
+
+See http://big-data-charm-helpers.readthedocs.org/en/latest/examples/framework.html
+for more information.
+"""
 import common
 common.manage()

=== modified file 'resources.yaml'
--- resources.yaml	2015-06-19 16:48:37 +0000
+++ resources.yaml	2015-06-24 22:19:52 +0000
@@ -3,16 +3,8 @@
 resources:
   pathlib:
     pypi: path.py>=7.0
-  pyaml:
-    pypi: pyaml
-  six:
-    pypi: six
   jujubigdata:
-    pypi: jujubigdata>=2.0.0,<3.0.0
-  charmhelpers:
-    pypi: http://bazaar.launchpad.net/~bigdata-dev/bigdata-data/trunk/download/kevin.monroe%40canonical.com-20150610215108-gq4ud2rriy1sp1h6/charmhelpers0.3.1.ta-20150610215050-vxrqhizdsrqwnmcm-1/charmhelpers-0.3.1.tar.gz
-    hash: 061fe7204289b96fab5d3ca02883040ea3026526ebf0ad38e21457527a18d139
-    hash_type: sha256
+    pypi: jujubigdata>=2.0.2,<3.0.0
   java-installer:
     # This points to a script which manages installing Java.
     # If replaced with an alternate implementation, it must output *only* two

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