Merge pull request PelicanPlatform#443 from jhiemstrawisc/cache-super…

…visord

Add cache supervisord process

images/supervisord/pelican_cache_serve.conf

@@ -0,0 +1,28 @@
+
+#
+# Copyright (C) 2023, Pelican Project, Morgridge Institute for Research
+#
+# 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.
+#
+
+[program:pelican_cache_serve]
+command=/pelican/osdf-client cache serve %(ENV_OSDF_CACHE_ARGS)s
+autostart=false
+autorestart=true
+redirect_stderr=true
+# We can run the cache with all args configured via our pelican.yaml
+# or via individual environment variables, so this environment variable
+# need not be populated. However, if we don't give it at least an empty
+# var, supervisord won't expand it and there will be an error. Set the
+# default to empty.
+environment=OSDF_CACHE_ARGS=""