add model for services_max_specs

packages/postgres-database/src/simcore_postgres_database/models/services_max_specifications.py

@@ -0,0 +1,107 @@
+"""
+    Defines specific services/group ID maximal specifications
+
+    A group X may have specific maximal specifications defined when running a jupyter-lab-math
+    for example that should run on a specific machine with a specific GPU.
+
+"""
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.sql import func
+
+from .base import metadata
+
+services_max_specifications = sa.Table(
+    "services_max_specifications",
+    metadata,
+    sa.Column(
+        "service_key",
+        sa.String,
+        nullable=False,
+        doc="Service Key Identifier",
+    ),
+    sa.Column("service_version", sa.String, nullable=False, doc="Service version"),
+    sa.Column(
+        "gid",
+        sa.BigInteger,
+        sa.ForeignKey(
+            "groups.gid",
+            name="fk_services_max_specifications_gid_groups",
+            onupdate="CASCADE",
+            ondelete="CASCADE",
+        ),
+        doc="Group Identifier",
+    ),
+    sa.Column(
+        "sidecar",
+        JSONB,
+        nullable=True,
+        doc="schedule-time specifications for the service sidecar (follows Docker Service creation API, see https://docs.docker.com/engine/api/v1.25/#operation/ServiceCreate)",
+    ),
+    sa.Column(
+        "service",
+        JSONB,
+        nullable=True,
+        doc="schedule-time specifications for the service (follows Docker Service creation API, see https://docs.docker.com/engine/api/v1.41/#tag/Service/operation/ServiceCreate",
+    ),
+    sa.Column(
+        "created",
+        sa.DateTime(),
+        nullable=False,
+        server_default=func.now(),
+        doc="Timestamp on creation",
+    ),
+    sa.Column(
+        "modified",
+        sa.DateTime(),
+        nullable=False,
+        server_default=func.now(),
+        onupdate=func.now(),
+        doc="Timestamp with last update",
+    ),
+    # If service-key/version gets deleted from service_metadata, it should be deleted from here
+    sa.ForeignKeyConstraint(
+        ["service_key", "service_version"],
+        ["services_meta_data.key", "services_meta_data.version"],
+        onupdate="CASCADE",
+        ondelete="CASCADE",
+    ),
+    sa.PrimaryKeyConstraint(
+        "service_key",
+        "service_version",
+        "gid",
+        name="services_max_specifications_pk",
+    ),
+)
+
+# ------------------------ TRIGGERS
+refresh_modified_trigger = sa.text(
+    """
+DROP TRIGGER IF EXISTS services_max_specifications_modification on services_max_specifications;
+CREATE TRIGGER services_max_specifications_modification
+BEFORE UPDATE ON services_max_specifications
+    FOR EACH ROW
+    EXECUTE PROCEDURE refresh_services_max_specifications_modified();
+"""
+)
+
+
+# --------------------------- PROCEDURES
+refresh_modified_procedure = sa.text(
+    """
+CREATE OR REPLACE FUNCTION refresh_services_max_specifications_modified() RETURNS TRIGGER AS $$
+DECLARE
+    group_id BIGINT;
+BEGIN
+    NEW.updated_at := now();
+    RETURN NEW;
+END; $$ LANGUAGE 'plpgsql';
+    """
+)
+
+sa.event.listen(services_max_specifications, "after_create", refresh_modified_procedure)
+sa.event.listen(
+    services_max_specifications,
+    "after_create",
+    refresh_modified_trigger,
+)