{
  "$schema": "https://json-schema.org/draft-07/schema",
  "$id": "compose_spec.json",
  "type": "object",
  "title": "Compose Specification",
  "description": "The Compose file is a YAML file defining a multi-containers based application.",

  "properties": {
    "version": {
      "type": "string",
      "description": "declared for backward compatibility, ignored."
    },

    "name": {
      "type": "string",
      "description": "define the Compose project name, until user defines one explicitly."
    },

    "include": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/include"
      },
      "description": "compose sub-projects to be included."
    },

    "services": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z0-9._-]+$": {
          "$ref": "#/definitions/service"
        }
      },
      "additionalProperties": false
    },

    "networks": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z0-9._-]+$": {
          "$ref": "#/definitions/network"
        }
      }
    },

    "volumes": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z0-9._-]+$": {
          "$ref": "#/definitions/volume"
        }
      },
      "additionalProperties": false
    },

    "secrets": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z0-9._-]+$": {
          "$ref": "#/definitions/secret"
        }
      },
      "additionalProperties": false
    },

    "configs": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z0-9._-]+$": {
          "$ref": "#/definitions/config"
        }
      },
      "additionalProperties": false
    }
  },

  "patternProperties": {"^x-": {}},
  "additionalProperties": false,

  "definitions": {

    "service": {
      "type": "object",

      "properties": {
        "develop": {"$ref": "#/definitions/development"},
        "deploy": {"$ref": "#/definitions/deployment"},
        "annotations": {"$ref": "#/definitions/list_or_dict"},
        "attach": {"type": ["boolean", "string"]},
        "build": {
          "oneOf": [
            {"type": "string"},
            {
              "type": "object",
              "properties": {
                "context": {"type": "string"},
                "dockerfile": {"type": "string"},
                "dockerfile_inline": {"type": "string"},
                "entitlements": {"type": "array", "items": {"type": "string"}},
                "args": {"$ref": "#/definitions/list_or_dict"},
                "ssh": {"$ref": "#/definitions/list_or_dict"},
                "labels": {"$ref": "#/definitions/list_or_dict"},
                "cache_from": {"type": "array", "items": {"type": "string"}},
                "cache_to": {"type": "array", "items": {"type": "string"}},
                "no_cache": {"type": ["boolean", "string"]},
                "additional_contexts": {"$ref": "#/definitions/list_or_dict"},
                "network": {"type": "string"},
                "pull": {"type": ["boolean", "string"]},
                "target": {"type": "string"},
                "shm_size": {"type": ["integer", "string"]},
                "extra_hosts": {"$ref": "#/definitions/extra_hosts"},
                "isolation": {"type": "string"},
                "privileged": {"type": ["boolean", "string"]},
                "secrets": {"$ref": "#/definitions/service_config_or_secret"},
                "tags": {"type": "array", "items": {"type": "string"}},
                "ulimits": {"$ref": "#/definitions/ulimits"},
                "platforms": {"type": "array", "items": {"type": "string"}}
              },
              "additionalProperties": false,
              "patternProperties": {"^x-": {}}
            }
          ]
        },
        "blkio_config": {
          "type": "object",
          "properties": {
            "device_read_bps": {
              "type": "array",
              "items": {"$ref": "#/definitions/blkio_limit"}
            },
            "device_read_iops": {
              "type": "array",
              "items": {"$ref": "#/definitions/blkio_limit"}
            },
            "device_write_bps": {
              "type": "array",
              "items": {"$ref": "#/definitions/blkio_limit"}
            },
            "device_write_iops": {
              "type": "array",
              "items": {"$ref": "#/definitions/blkio_limit"}
            },
            "weight": {"type": ["integer", "string"]},
            "weight_device": {
              "type": "array",
              "items": {"$ref": "#/definitions/blkio_weight"}
            }
          },
          "additionalProperties": false
        },
        "cap_add": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
        "cap_drop": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
        "cgroup": {"type": "string", "enum": ["host", "private"]},
        "cgroup_parent": {"type": "string"},
        "command": {"$ref": "#/definitions/command"},
        "configs": {"$ref": "#/definitions/service_config_or_secret"},
        "container_name": {"type": "string"},
        "cpu_count": {"oneOf": [
          {"type": "string"},
          {"type": "integer", "minimum": 0}
        ]},
        "cpu_percent": {"oneOf": [
          {"type": "string"},
          {"type": "integer", "minimum": 0, "maximum": 100}
        ]},
        "cpu_shares": {"type": ["number", "string"]},
        "cpu_quota": {"type": ["number", "string"]},
        "cpu_period": {"type": ["number", "string"]},
        "cpu_rt_period": {"type": ["number", "string"]},
        "cpu_rt_runtime": {"type": ["number", "string"]},
        "cpus": {"type": ["number", "string"]},
        "cpuset": {"type": "string"},
        "credential_spec": {
          "type": "object",
          "properties": {
            "config": {"type": "string"},
            "file": {"type": "string"},
            "registry": {"type": "string"}
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "depends_on": {
          "oneOf": [
            {"$ref": "#/definitions/list_of_strings"},
            {
              "type": "object",
              "additionalProperties": false,
              "patternProperties": {
                "^[a-zA-Z0-9._-]+$": {
                  "type": "object",
                  "additionalProperties": false,
                  "patternProperties": {"^x-": {}},
                  "properties": {
                    "restart": {"type": ["boolean", "string"]},
                    "required": {
                      "type":  "boolean",
                      "default": true
                    },
                    "condition": {
                      "type": "string",
                      "enum": ["service_started", "service_healthy", "service_completed_successfully"]
                    }
                  },
                  "required": ["condition"]
                }
              }
            }
          ]
        },
        "device_cgroup_rules": {"$ref": "#/definitions/list_of_strings"},
        "devices": {
          "type": "array",
          "items": {
            "oneOf": [
              {"type": "string"},
              {
                "type": "object",
                "required": ["source"],
                "properties": {
                  "source": {"type": "string"},
                  "target": {"type": "string"},
                  "permissions": {"type": "string"}
                },
                "additionalProperties": false,
                "patternProperties": {"^x-": {}}
              }
            ]
          }
        },
        "dns": {"$ref": "#/definitions/string_or_list"},
        "dns_opt": {"type": "array","items": {"type": "string"}, "uniqueItems": true},
        "dns_search": {"$ref": "#/definitions/string_or_list"},
        "domainname": {"type": "string"},
        "entrypoint": {"$ref": "#/definitions/command"},
        "env_file": {"$ref": "#/definitions/env_file"},
        "label_file": {"$ref": "#/definitions/label_file"},
        "environment": {"$ref": "#/definitions/list_or_dict"},

        "expose": {
          "type": "array",
          "items": {
            "type": ["string", "number"]
          },
          "uniqueItems": true
        },
        "extends": {
          "oneOf": [
            {"type": "string"},
            {
              "type": "object",

              "properties": {
                "service": {"type": "string"},
                "file": {"type": "string"}
              },
              "required": ["service"],
              "additionalProperties": false
            }
          ]
        },
        "external_links": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
        "extra_hosts": {"$ref": "#/definitions/extra_hosts"},
        "gpus": {"$ref": "#/definitions/gpus"},
        "group_add": {
          "type": "array",
          "items": {
            "type": ["string", "number"]
          },
          "uniqueItems": true
        },
        "healthcheck": {"$ref": "#/definitions/healthcheck"},
        "hostname": {"type": "string"},
        "image": {"type": "string"},
        "init": {"type": ["boolean", "string"]},
        "ipc": {"type": "string"},
        "isolation": {"type": "string"},
        "labels": {"$ref": "#/definitions/list_or_dict"},
        "links": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
        "logging": {
          "type": "object",

          "properties": {
            "driver": {"type": "string"},
            "options": {
              "type": "object",
              "patternProperties": {
                "^.+$": {"type": ["string", "number", "null"]}
              }
            }
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "mac_address": {"type": "string"},
        "mem_limit": {"type": ["number", "string"]},
        "mem_reservation": {"type": ["string", "integer"]},
        "mem_swappiness": {"type": ["integer", "string"]},
        "memswap_limit": {"type": ["number", "string"]},
        "network_mode": {"type": "string"},
        "networks": {
          "oneOf": [
            {"$ref": "#/definitions/list_of_strings"},
            {
              "type": "object",
              "patternProperties": {
                "^[a-zA-Z0-9._-]+$": {
                  "oneOf": [
                    {
                      "type": "object",
                      "properties": {
                        "aliases": {"$ref": "#/definitions/list_of_strings"},
                        "ipv4_address": {"type": "string"},
                        "ipv6_address": {"type": "string"},
                        "link_local_ips": {"$ref": "#/definitions/list_of_strings"},
                        "mac_address": {"type": "string"},
                        "driver_opts": {
                          "type": "object",
                          "patternProperties": {
                            "^.+$": {"type": ["string", "number"]}
                          }
                        },
                        "priority": {"type": "number"},
                        "gw_priority": {"type": "number"}
                      },
                      "additionalProperties": false,
                      "patternProperties": {"^x-": {}}
                    },
                    {"type": "null"}
                  ]
                }
              },
              "additionalProperties": false
            }
          ]
        },
        "oom_kill_disable": {"type": ["boolean", "string"]},
        "oom_score_adj": {"oneOf": [
          {"type": "string"},
          {"type": "integer", "minimum": -1000, "maximum": 1000}
        ]},
        "pid": {"type": ["string", "null"]},
        "pids_limit": {"type": ["number", "string"]},
        "platform": {"type": "string"},
        "ports": {
          "type": "array",
          "items": {
            "oneOf": [
              {"type": "number"},
              {"type": "string"},
              {
                "type": "object",
                "properties": {
                  "name": {"type": "string"},
                  "mode": {"type": "string"},
                  "host_ip": {"type": "string"},
                  "target": {"type": ["integer", "string"]},
                  "published": {"type": ["string", "integer"]},
                  "protocol": {"type": "string"},
                  "app_protocol": {"type": "string"}
                },
                "additionalProperties": false,
                "patternProperties": {"^x-": {}}
              }
            ]
          },
          "uniqueItems": true
        },
        "post_start": {"type": "array", "items": {"$ref": "#/definitions/service_hook"}},
        "pre_stop": {"type": "array", "items": {"$ref": "#/definitions/service_hook"}},
        "privileged": {"type": ["boolean", "string"]},
        "profiles": {"$ref": "#/definitions/list_of_strings"},
        "pull_policy": {"type": "string",
          "pattern": "always|never|build|if_not_present|missing|refresh|daily|weekly|every_([0-9]+[wdhms])+"
        },
        "pull_refresh_after": {"type": "string"},
        "read_only": {"type": ["boolean", "string"]},
        "restart": {"type": "string"},
        "runtime": {
          "type": "string"
        },
        "scale": {
          "type": ["integer", "string"]
        },
        "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
        "shm_size": {"type": ["number", "string"]},
        "secrets": {"$ref": "#/definitions/service_config_or_secret"},
        "sysctls": {"$ref": "#/definitions/list_or_dict"},
        "stdin_open": {"type": ["boolean", "string"]},
        "stop_grace_period": {"type": "string"},
        "stop_signal": {"type": "string"},
        "storage_opt": {"type": "object"},
        "tmpfs": {"$ref": "#/definitions/string_or_list"},
        "tty": {"type": ["boolean", "string"]},
        "ulimits": {"$ref": "#/definitions/ulimits"},
        "user": {"type": "string"},
        "uts": {"type": "string"},
        "userns_mode": {"type": "string"},
        "volumes": {
          "type": "array",
          "items": {
            "oneOf": [
              {"type": "string"},
              {
                "type": "object",
                "required": ["type"],
                "properties": {
                  "type": {"type": "string"},
                  "source": {"type": "string"},
                  "target": {"type": "string"},
                  "read_only": {"type": ["boolean", "string"]},
                  "consistency": {"type": "string"},
                  "bind": {
                    "type": "object",
                    "properties": {
                      "propagation": {"type": "string"},
                      "create_host_path": {"type": ["boolean", "string"]},
                      "recursive": {"type": "string", "enum": ["enabled", "disabled", "writable", "readonly"]},
                      "selinux": {"type": "string", "enum": ["z", "Z"]}
                    },
                    "additionalProperties": false,
                    "patternProperties": {"^x-": {}}
                  },
                  "volume": {
                    "type": "object",
                    "properties": {
                      "nocopy": {"type": ["boolean", "string"]},
                      "subpath": {"type": "string"}
                    },
                    "additionalProperties": false,
                    "patternProperties": {"^x-": {}}
                  },
                  "tmpfs": {
                    "type": "object",
                    "properties": {
                      "size": {
                        "oneOf": [
                          {"type": "integer", "minimum": 0},
                          {"type": "string"}
                        ]
                      },
                      "mode": {"type": ["number", "string"]}
                    },
                    "additionalProperties": false,
                    "patternProperties": {"^x-": {}}
                  }
                },
                "additionalProperties": false,
                "patternProperties": {"^x-": {}}
              }
            ]
          },
          "uniqueItems": true
        },
        "volumes_from": {
          "type": "array",
          "items": {"type": "string"},
          "uniqueItems": true
        },
        "working_dir": {"type": "string"}
      },
      "patternProperties": {"^x-": {}},
      "additionalProperties": false
    },

    "healthcheck": {
      "type": "object",
      "properties": {
        "disable": {"type": ["boolean", "string"]},
        "interval": {"type": "string"},
        "retries": {"type": ["number", "string"]},
        "test": {
          "oneOf": [
            {"type": "string"},
            {"type": "array", "items": {"type": "string"}}
          ]
        },
        "timeout": {"type": "string"},
        "start_period": {"type": "string"},
        "start_interval": {"type": "string"}
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },
    "development": {
      "type": ["object", "null"],
      "properties": {
        "watch": {
          "type": "array",
          "items": {
            "type": "object",
            "required": ["path", "action"],
            "properties": {
              "ignore": {"$ref": "#/definitions/string_or_list"},
              "include": {"$ref": "#/definitions/string_or_list"},
              "path": {"type": "string"},
              "action": {"type": "string", "enum": ["rebuild", "sync", "restart", "sync+restart", "sync+exec"]},
              "target": {"type": "string"},
              "exec": {"$ref": "#/definitions/service_hook"}
            },
            "additionalProperties": false,
            "patternProperties": {"^x-": {}}
          }
        }
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },
    "deployment": {
      "type": ["object", "null"],
      "properties": {
        "mode": {"type": "string"},
        "endpoint_mode": {"type": "string"},
        "replicas": {"type": ["integer", "string"]},
        "labels": {"$ref": "#/definitions/list_or_dict"},
        "rollback_config": {
          "type": "object",
          "properties": {
            "parallelism": {"type": ["integer", "string"]},
            "delay": {"type": "string"},
            "failure_action": {"type": "string"},
            "monitor": {"type": "string"},
            "max_failure_ratio": {"type": ["number", "string"]},
            "order": {"type": "string", "enum": [
              "start-first", "stop-first"
            ]}
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "update_config": {
          "type": "object",
          "properties": {
            "parallelism": {"type": ["integer", "string"]},
            "delay": {"type": "string"},
            "failure_action": {"type": "string"},
            "monitor": {"type": "string"},
            "max_failure_ratio": {"type": ["number", "string"]},
            "order": {"type": "string", "enum": [
              "start-first", "stop-first"
            ]}
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "resources": {
          "type": "object",
          "properties": {
            "limits": {
              "type": "object",
              "properties": {
                "cpus": {"type": ["number", "string"]},
                "memory": {"type": "string"},
                "pids": {"type": ["integer", "string"]}
              },
              "additionalProperties": false,
              "patternProperties": {"^x-": {}}
            },
            "reservations": {
              "type": "object",
              "properties": {
                "cpus": {"type": ["number", "string"]},
                "memory": {"type": "string"},
                "generic_resources": {"$ref": "#/definitions/generic_resources"},
                "devices": {"$ref": "#/definitions/devices"}
              },
              "additionalProperties": false,
              "patternProperties": {"^x-": {}}
            }
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "restart_policy": {
          "type": "object",
          "properties": {
            "condition": {"type": "string"},
            "delay": {"type": "string"},
            "max_attempts": {"type": ["integer", "string"]},
            "window": {"type": "string"}
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "placement": {
          "type": "object",
          "properties": {
            "constraints": {"type": "array", "items": {"type": "string"}},
            "preferences": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "spread": {"type": "string"}
                },
                "additionalProperties": false,
                "patternProperties": {"^x-": {}}
              }
            },
            "max_replicas_per_node": {"type": ["integer", "string"]}
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        }
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },

    "generic_resources": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "discrete_resource_spec": {
            "type": "object",
            "properties": {
              "kind": {"type": "string"},
              "value": {"type": ["number", "string"]}
            },
            "additionalProperties": false,
            "patternProperties": {"^x-": {}}
          }
        },
        "additionalProperties": false,
        "patternProperties": {"^x-": {}}
      }
    },

    "devices": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "capabilities": {"$ref": "#/definitions/list_of_strings"},
          "count": {"type": ["string", "integer"]},
          "device_ids": {"$ref": "#/definitions/list_of_strings"},
          "driver":{"type": "string"},
          "options":{"$ref": "#/definitions/list_or_dict"}
        },
        "additionalProperties": false,
        "patternProperties": {"^x-": {}},
        "required": [
          "capabilities"
        ]
      }
    },

    "gpus": {
      "oneOf": [
        {"type": "string", "enum": ["all"]},
        {"type": "array",
         "items": {
          "type": "object",
            "properties": {
              "capabilities": {"$ref": "#/definitions/list_of_strings"},
              "count": {"type": ["string", "integer"]},
              "device_ids": {"$ref": "#/definitions/list_of_strings"},
              "driver":{"type": "string"},
              "options":{"$ref": "#/definitions/list_or_dict"}
            }
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        }
      ]
    },

    "include": {
      "oneOf": [
        {"type": "string"},
        {
          "type": "object",
          "properties": {
            "path": {"$ref": "#/definitions/string_or_list"},
            "env_file": {"$ref": "#/definitions/string_or_list"},
            "project_directory": {"type": "string"}
          },
          "additionalProperties": false
        }
      ]
    },

    "network": {
      "type": ["object", "null"],
      "properties": {
        "name": {"type": "string"},
        "driver": {"type": "string"},
        "driver_opts": {
          "type": "object",
          "patternProperties": {
            "^.+$": {"type": ["string", "number"]}
          }
        },
        "ipam": {
          "type": "object",
          "properties": {
            "driver": {"type": "string"},
            "config": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "subnet": {"type": "string"},
                  "ip_range": {"type": "string"},
                  "gateway": {"type": "string"},
                  "aux_addresses": {
                    "type": "object",
                    "additionalProperties": false,
                    "patternProperties": {"^.+$": {"type": "string"}}
                  }
                },
                "additionalProperties": false,
                "patternProperties": {"^x-": {}}
              }
            },
            "options": {
              "type": "object",
              "additionalProperties": false,
              "patternProperties": {"^.+$": {"type": "string"}}
            }
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "external": {
          "type": ["boolean", "string", "object"],
          "properties": {
            "name": {
              "deprecated": true,
              "type": "string"
            }
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "internal": {"type": ["boolean", "string"]},
        "enable_ipv4": {"type": ["boolean", "string"]},
        "enable_ipv6": {"type": ["boolean", "string"]},
        "attachable": {"type": ["boolean", "string"]},
        "labels": {"$ref": "#/definitions/list_or_dict"}
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },

    "volume": {
      "type": ["object", "null"],
      "properties": {
        "name": {"type": "string"},
        "driver": {"type": "string"},
        "driver_opts": {
          "type": "object",
          "patternProperties": {
            "^.+$": {"type": ["string", "number"]}
          }
        },
        "external": {
          "type": ["boolean", "string", "object"],
          "properties": {
            "name": {
              "deprecated": true,
              "type": "string"
            }
          },
          "additionalProperties": false,
          "patternProperties": {"^x-": {}}
        },
        "labels": {"$ref": "#/definitions/list_or_dict"}
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },

    "secret": {
      "type": "object",
      "properties": {
        "name": {"type": "string"},
        "environment": {"type": "string"},
        "file": {"type": "string"},
        "external": {
          "type": ["boolean", "string", "object"],
          "properties": {
            "name": {"type": "string"}
          }
        },
        "labels": {"$ref": "#/definitions/list_or_dict"},
        "driver": {"type": "string"},
        "driver_opts": {
          "type": "object",
          "patternProperties": {
            "^.+$": {"type": ["string", "number"]}
          }
        },
        "template_driver": {"type": "string"}
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },

    "config": {
      "type": "object",
      "properties": {
        "name": {"type": "string"},
        "content": {"type": "string"},
        "environment": {"type": "string"},
        "file": {"type": "string"},
        "external": {
          "type": ["boolean", "string", "object"],
          "properties": {
            "name": {
              "deprecated": true,
              "type": "string"
            }
          }
        },
        "labels": {"$ref": "#/definitions/list_or_dict"},
        "template_driver": {"type": "string"}
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}}
    },

    "command": {
      "oneOf": [
        {"type": "null"},
        {"type": "string"},
        {"type": "array","items": {"type": "string"}}
      ]
    },

    "service_hook": {
      "type": "object",
      "properties": {
        "command": {"$ref": "#/definitions/command"},
        "user": {"type": "string"},
        "privileged": {"type": ["boolean", "string"]},
        "working_dir": {"type": "string"},
        "environment": {"$ref": "#/definitions/list_or_dict"}
      },
      "additionalProperties": false,
      "patternProperties": {"^x-": {}},
      "required": ["command"]
    },

    "env_file": {
      "oneOf": [
        {"type": "string"},
        {
          "type": "array",
          "items": {
            "oneOf": [
              {"type": "string"},
              {
                "type": "object",
                "additionalProperties": false,
                "properties": {
                  "path": {
                    "type": "string"
                  },
                  "format": {
                    "type": "string"
                  },
                  "required": {
                    "type": ["boolean", "string"],
                    "default": true
                  }
                },
                "required": [
                  "path"
                ]
              }
            ]
          }
        }
      ]
    },

    "label_file": {
      "oneOf": [
        {"type": "string"},
        {
          "type": "array",
          "items": {"type": "string"}
        }
      ]
    },

    "string_or_list": {
      "oneOf": [
        {"type": "string"},
        {"$ref": "#/definitions/list_of_strings"}
      ]
    },

    "list_of_strings": {
      "type": "array",
      "items": {"type": "string"},
      "uniqueItems": true
    },

    "list_or_dict": {
      "oneOf": [
        {
          "type": "object",
          "patternProperties": {
            ".+": {
              "type": ["string", "number", "boolean", "null"]
            }
          },
          "additionalProperties": false
        },
        {"type": "array", "items": {"type": "string"}, "uniqueItems": true}
      ]
    },

    "extra_hosts": {
      "oneOf": [
        {
          "type": "object",
          "patternProperties": {
            ".+": {
              "oneOf": [
                {
                  "type": "string"
                },
                {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "uniqueItems": false
                }
              ]
            }
          },
          "additionalProperties": false
        },
        {"type": "array", "items": {"type": "string"}, "uniqueItems": true}
      ]
    },

    "blkio_limit": {
      "type": "object",
      "properties": {
        "path": {"type": "string"},
        "rate": {"type": ["integer", "string"]}
      },
      "additionalProperties": false
    },
    "blkio_weight": {
      "type": "object",
      "properties": {
        "path": {"type": "string"},
        "weight": {"type": ["integer", "string"]}
      },
      "additionalProperties": false
    },
    "service_config_or_secret": {
      "type": "array",
      "items": {
        "oneOf": [
          {"type": "string"},
          {
            "type": "object",
            "properties": {
              "source": {"type": "string"},
              "target": {"type": "string"},
              "uid": {"type": "string"},
              "gid": {"type": "string"},
              "mode": {"type": ["number", "string"]}
            },
            "additionalProperties": false,
            "patternProperties": {"^x-": {}}
          }
        ]
      }
    },
    "ulimits": {
      "type": "object",
      "patternProperties": {
        "^[a-z]+$": {
          "oneOf": [
            {"type": ["integer", "string"]},
            {
              "type": "object",
              "properties": {
                "hard": {"type": ["integer", "string"]},
                "soft": {"type": ["integer", "string"]}
              },
              "required": ["soft", "hard"],
              "additionalProperties": false,
              "patternProperties": {"^x-": {}}
            }
          ]
        }
      }
    }
  }
}