Add a custom solr healthcheck

calisphere/apps.py

@@ -1,5 +1,6 @@
 from django.apps import AppConfig
 from calisphere.registry_data import RegistryManager
+from health_check.plugins import plugin_dir
 
 
 class CalisphereAppConfig(AppConfig):
@@ -9,3 +10,6 @@ class CalisphereAppConfig(AppConfig):
 
     def ready(self):
         self.registry = RegistryManager()
+
+        from .solr_healthcheck import SolrHealthCheckBackend
+        plugin_dir.register(SolrHealthCheckBackend)

calisphere/solr_healthcheck.py

@@ -0,0 +1,16 @@
+from health_check.backends import BaseHealthCheckBackend
+from cache_retry import SOLR
+
+class SolrHealthCheckBackend(BaseHealthCheckBackend):
+    #: The status endpoints will respond with a 200 status code
+    #: even if the check errors.
+    critical_service = False
+
+    def check_status(self):
+        try:
+            resp = SOLR(q="cats")
+        except:
+            raise HealthCheckException
+
+    def identifier(self):
+        return self.__class__.__name__  # Display name on the endpoint.