Move to using REQUIRED_INTERFACES and check for swift-hash.

hooks/swift_storage_hooks.py

@@ -17,6 +17,7 @@ from lib.swift_storage_utils import (
     setup_storage,
     assert_charm_supports_ipv6,
     setup_rsync,
+    REQUIRED_INTERFACES,
 )
 
 from lib.misc_utils import pause_aware_restart_on_change
@@ -42,6 +43,7 @@ from charmhelpers.payload.execd import execd_preinstall
 from charmhelpers.contrib.openstack.utils import (
     configure_installation_source,
     openstack_upgrade_available,
+    set_os_workload_status,
 )
 from charmhelpers.contrib.network.ip import (
     get_ipv6_addr
@@ -165,7 +167,8 @@ def main():
         hooks.execute(sys.argv)
     except UnregisteredHookError as e:
         log('Unknown hook {} - skipping.'.format(e))
-    assess_status()
+    set_os_workload_status(CONFIGS, REQUIRED_INTERFACES,
+                           charm_func=assess_status)
 
 
 if __name__ == '__main__':

lib/swift_storage_utils.py

@@ -39,7 +39,6 @@ from charmhelpers.core.hookenv import (
     ERROR,
     unit_private_ip,
     relation_ids,
-    status_set,
 )
 
 from charmhelpers.contrib.storage.linux.utils import (
@@ -70,6 +69,10 @@ PACKAGES = [
 
 TEMPLATES = 'templates/'
 
+REQUIRED_INTERFACES = {
+    'proxy': ['swift-storage'],
+}
+
 ACCOUNT_SVCS = [
     'swift-account', 'swift-account-auditor',
     'swift-account-reaper', 'swift-account-replicator'
@@ -343,10 +346,13 @@ socket options = SO_KEEPALIVE
     f.close()
 
 
-def assess_status():
+def assess_status(configs):
     """Assess status of current unit"""
-    # Check for required swift-storage relation to swift-proxy
+    # Verify swift-hash received from swift-proxy
+    ctxt = SwiftStorageContext()()
     if len(relation_ids('swift-storage')) < 1:
-        status_set('blocked', 'Missing relation: proxy')
+        return '', ''
+    elif not ctxt or not ctxt['swift_hash']:
+        return 'blocked', 'Missing swift-hash from proxy relation'
     else:
-        status_set('active', 'Unit is ready')
+        return 'active', 'Unit is ready'