Get all PlacementGroups

{
  "type": "object",
  "required": [
    "placement_groups"
  ],
  "properties": {
    "meta": {
      "type": "object",
      "required": [
        "pagination"
      ],
      "properties": {
        "pagination": {
          "type": "object",
          "required": [
            "last_page",
            "next_page",
            "page",
            "per_page",
            "previous_page",
            "total_entries"
          ],
          "properties": {
            "last_page": {
              "type": "number",
              "description": "ID of the last page available. Can be null if the current page is the last one."
            },
            "next_page": {
              "type": "number",
              "description": "ID of the next page. Can be null if the current page is the last one."
            },
            "page": {
              "type": "number",
              "description": "Current page number"
            },
            "per_page": {
              "type": "number",
              "description": "Maximum number of items shown per page in the response"
            },
            "previous_page": {
              "type": "number",
              "description": "ID of the previous page. Can be null if the current page is the first one."
            },
            "total_entries": {
              "type": "number",
              "description": "The total number of entries that exist in the database for this query. Nullable if unknown."
            }
          }
        }
      }
    },
    "placement_groups": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "name",
          "labels",
          "type",
          "created",
          "servers"
        ],
        "properties": {
          "created": {
            "type": "string",
            "description": "Point in time when the Resource was created (in ISO-8601 format)"
          },
          "id": {
            "type": "integer",
            "description": "ID of the Resource"
          },
          "labels": {
            "type": "object",
            "description": "User-defined labels (key-value pairs)"
          },
          "name": {
            "type": "string",
            "description": "Name of the Resource. Must be unique per Project."
          },
          "servers": {
            "type": "array",
            "description": "Array of IDs of Servers that are part of this Placement Group",
            "items": {
              "type": "integer"
            }
          },
          "type": {
            "type": "string",
            "description": "Type of the Placement Group",
            "enum": [
              "spread"
            ]
          }
        }
      }
    }
  }
}