Port configuration to ccConfig scheme

Decentralize config validation
Modularize configuration handling

pkg/archive/ConfigSchema.go

@@ -0,0 +1,49 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved. This file is part of cc-backend.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package archive
+
+var configSchema = `
+	{
+      "type": "object",
+      "properties": {
+        "kind": {
+          "description": "Backend type for job-archive",
+          "type": "string",
+          "enum": ["file", "s3"]
+        },
+        "path": {
+          "description": "Path to job archive for file backend",
+          "type": "string"
+        },
+        "compression": {
+          "description": "Setup automatic compression for jobs older than number of days",
+          "type": "integer"
+        },
+        "retention": {
+          "description": "Configuration keys for retention",
+          "type": "object",
+          "properties": {
+            "policy": {
+              "description": "Retention policy",
+              "type": "string",
+              "enum": ["none", "delete", "move"]
+            },
+            "includeDB": {
+              "description": "Also remove jobs from database",
+              "type": "boolean"
+            },
+            "age": {
+              "description": "Act on jobs with startTime older than age (in days)",
+              "type": "integer"
+            },
+            "location": {
+              "description": "The target directory for retention. Only applicable for retention move.",
+              "type": "string"
+            }
+          },
+          "required": ["policy"]
+        }
+      },
+      "required": ["kind"]}`