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diff --git a/installers/charm/mon/src/pod_spec.py b/installers/charm/mon/src/pod_spec.py
new file mode 100644
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+++ b/installers/charm/mon/src/pod_spec.py
@@ -0,0 +1,204 @@
+#!/usr/bin/env python3
+# Copyright 2020 Canonical Ltd.
+#
+# 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.
+#
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: legal@canonical.com
+#
+# To get in touch with the maintainers, please contact:
+# osm-charmers@lists.launchpad.net
+##
+
+import logging
+from pydantic import BaseModel, constr, PositiveInt
+from typing import Any, Dict, List
+
+logger = logging.getLogger(__name__)
+
+
+class ConfigData(BaseModel):
+    """Configuration data model."""
+
+    openstack_default_granularity: PositiveInt
+    global_request_timeout: PositiveInt
+    log_level: constr(regex=r"^(INFO|DEBUG)$")
+    collector_interval: PositiveInt
+    evaluator_interval: PositiveInt
+    database_commonkey: constr(min_length=1)
+    vca_host: constr(min_length=1)
+    vca_user: constr(min_length=1)
+    vca_password: constr(min_length=1)
+    vca_cacert: str
+
+
+class RelationData(BaseModel):
+    """Relation data model."""
+
+    message_host: constr(min_length=1)
+    message_port: PositiveInt
+    database_uri: constr(regex=r"^(mongodb://)")
+    prometheus_host: constr(min_length=1)
+    prometheus_port: PositiveInt
+
+
+def _make_pod_ports(port: int) -> List[Dict[str, Any]]:
+    """Generate pod ports details.
+
+    Args:
+        port (int): port to expose.
+
+    Returns:
+        List[Dict[str, Any]]: pod port details.
+    """
+    return [{"name": "mon", "containerPort": port, "protocol": "TCP"}]
+
+
+def _make_pod_envconfig(
+    config: Dict[str, Any], relation_state: Dict[str, Any]
+) -> Dict[str, Any]:
+    """Generate pod environment configuration.
+
+    Args:
+        config (Dict[str, Any]): configuration information.
+        relation_state (Dict[str, Any]): relation state information.
+
+    Returns:
+        Dict[str, Any]: pod environment configuration.
+    """
+    envconfig = {
+        # General configuration
+        "ALLOW_ANONYMOUS_LOGIN": "yes",
+        "OSMMON_OPENSTACK_DEFAULT_GRANULARITY": config["openstack_default_granularity"],
+        "OSMMON_GLOBAL_REQUEST_TIMEOUT": config["global_request_timeout"],
+        "OSMMON_GLOBAL_LOGLEVEL": config["log_level"],
+        "OSMMON_COLLECTOR_INTERVAL": config["collector_interval"],
+        "OSMMON_EVALUATOR_INTERVAL": config["evaluator_interval"],
+        # Kafka configuration
+        "OSMMON_MESSAGE_DRIVER": "kafka",
+        "OSMMON_MESSAGE_HOST": relation_state["message_host"],
+        "OSMMON_MESSAGE_PORT": relation_state["message_port"],
+        # Database configuration
+        "OSMMON_DATABASE_DRIVER": "mongo",
+        "OSMMON_DATABASE_URI": relation_state["database_uri"],
+        "OSMMON_DATABASE_COMMONKEY": config["database_commonkey"],
+        # Prometheus configuration
+        "OSMMON_PROMETHEUS_URL": f"http://{relation_state['prometheus_host']}:{relation_state['prometheus_port']}",
+        # VCA configuration
+        "OSMMON_VCA_HOST": config["vca_host"],
+        "OSMMON_VCA_USER": config["vca_user"],
+        "OSMMON_VCA_SECRET": config["vca_password"],
+        "OSMMON_VCA_CACERT": config["vca_cacert"],
+    }
+
+    return envconfig
+
+
+def _make_startup_probe() -> Dict[str, Any]:
+    """Generate startup probe.
+
+    Returns:
+        Dict[str, Any]: startup probe.
+    """
+    return {
+        "exec": {"command": ["/usr/bin/pgrep python3"]},
+        "initialDelaySeconds": 60,
+        "timeoutSeconds": 5,
+    }
+
+
+def _make_readiness_probe(port: int) -> Dict[str, Any]:
+    """Generate readiness probe.
+
+    Args:
+        port (int): [description]
+
+    Returns:
+        Dict[str, Any]: readiness probe.
+    """
+    return {
+        "tcpSocket": {
+            "port": port,
+        },
+        "periodSeconds": 10,
+        "timeoutSeconds": 5,
+        "successThreshold": 1,
+        "failureThreshold": 3,
+    }
+
+
+def _make_liveness_probe(port: int) -> Dict[str, Any]:
+    """Generate liveness probe.
+
+    Args:
+        port (int): [description]
+
+    Returns:
+        Dict[str, Any]: liveness probe.
+    """
+    return {
+        "tcpSocket": {
+            "port": port,
+        },
+        "initialDelaySeconds": 45,
+        "periodSeconds": 10,
+        "timeoutSeconds": 5,
+        "successThreshold": 1,
+        "failureThreshold": 3,
+    }
+
+
+def make_pod_spec(
+    image_info: Dict[str, str],
+    config: Dict[str, Any],
+    relation_state: Dict[str, Any],
+    app_name: str = "mon",
+    port: int = 8000,
+) -> Dict[str, Any]:
+    """Generate the pod spec information.
+
+    Args:
+        image_info (Dict[str, str]): Object provided by
+                                     OCIImageResource("image").fetch().
+        config (Dict[str, Any]): Configuration information.
+        relation_state (Dict[str, Any]): Relation state information.
+        app_name (str, optional): Application name. Defaults to "mon".
+        port (int, optional): Port for the container. Defaults to 8000.
+
+    Returns:
+        Dict[str, Any]: Pod spec dictionary for the charm.
+    """
+    if not image_info:
+        return None
+
+    ConfigData(**(config))
+    RelationData(**(relation_state))
+
+    ports = _make_pod_ports(port)
+    env_config = _make_pod_envconfig(config, relation_state)
+
+    return {
+        "version": 3,
+        "containers": [
+            {
+                "name": app_name,
+                "imageDetails": image_info,
+                "imagePullPolicy": "Always",
+                "ports": ports,
+                "envConfig": env_config,
+            }
+        ],
+        "kubernetesResources": {
+            "ingressResources": [],
+        },
+    }