// Copyright 2020 Google LLC
//
// 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.

syntax = "proto3";

package google.cloud.osconfig.agentendpoint.v1beta;

import "google/api/field_behavior.proto";

option go_package = "cloud.google.com/go/osconfig/agentendpoint/apiv1beta/agentendpointpb;agentendpointpb";
option java_outer_classname = "GuestPolicies";
option java_package = "com.google.cloud.osconfig.agentendpoint.v1beta";
option php_namespace = "Google\\Cloud\\OsConfig\\V1beta";

// The desired state that the OS Config agent will maintain on the VM.
enum DesiredState {
  // The default is to ensure the package is installed.
  DESIRED_STATE_UNSPECIFIED = 0;

  // The agent ensures that the package is installed.
  INSTALLED = 1;

  // The agent ensures that the package is installed and
  // periodically checks for and install any updates.
  UPDATED = 2;

  // The agent ensures that the package is not installed and uninstall it
  // if detected.
  REMOVED = 3;
}

// Package is a reference to the software package to be installed or removed.
// The agent on the VM instance uses the system package manager to apply the
// config.
//
//
// These are the commands that the agent uses to install or remove
// packages.
//
// Apt
// install: `apt-get update && apt-get -y install package1 package2 package3`
// remove: `apt-get -y remove package1 package2 package3`
//
// Yum
// install: `yum -y install package1 package2 package3`
// remove: `yum -y remove package1 package2 package3`
//
// Zypper
// install: `zypper install package1 package2 package3`
// remove: `zypper rm package1 package2`
//
// Googet
// install: `googet -noconfirm install package1 package2 package3`
// remove: `googet -noconfirm remove package1 package2 package3`
message Package {
  // Types of package managers that may be used to manage this package.
  enum Manager {
    // The default behavior is ANY.
    MANAGER_UNSPECIFIED = 0;

    // Apply this package config using the default system package manager.
    ANY = 1;

    // Apply this package config only if Apt is available on the system.
    APT = 2;

    // Apply this package config only if Yum is available on the system.
    YUM = 3;

    // Apply this package config only if Zypper is available on the system.
    ZYPPER = 4;

    // Apply this package config only if GooGet is available on the system.
    GOO = 5;
  }

  // The name of the package. A package is uniquely identified for conflict
  // validation by checking the package name and the manager(s) that the
  // package targets.
  string name = 1;

  // The desired_state the agent should maintain for this package. The
  // default is to ensure the package is installed.
  DesiredState desired_state = 2;

  // Type of package manager that can be used to install this package.
  // If a system does not have the package manager, the package is not
  // installed or removed no error message is returned. By default,
  // or if you specify `ANY`,
  // the agent attempts to install and remove this package using the default
  // package manager. This is useful when creating a policy that applies to
  // different types of systems.
  //
  // The default behavior is ANY.
  Manager manager = 3;
}

// Represents a single Apt package repository. This repository is added to
// a repo file that is stored at
// `/etc/apt/sources.list.d/google_osconfig.list`.
message AptRepository {
  // Type of archive.
  enum ArchiveType {
    // Unspecified.
    ARCHIVE_TYPE_UNSPECIFIED = 0;

    // DEB indicates that the archive contains binary files.
    DEB = 1;

    // DEB_SRC indicates that the archive contains source files.
    DEB_SRC = 2;
  }

  // Type of archive files in this repository. The default behavior is DEB.
  ArchiveType archive_type = 1;

  // URI for this repository.
  string uri = 2;

  // Distribution of this repository.
  string distribution = 3;

  // List of components for this repository. Must contain at least one item.
  repeated string components = 4;

  // URI of the key file for this repository. The agent maintains
  // a keyring at `/etc/apt/trusted.gpg.d/osconfig_agent_managed.gpg` containing
  // all the keys in any applied guest policy.
  string gpg_key = 5;
}

// Represents a single Yum package repository. This repository is added to a
// repo file that is stored at `/etc/yum.repos.d/google_osconfig.repo`.
message YumRepository {
  // A one word, unique name for this repository. This is
  // the `repo id` in the Yum config file and also the `display_name` if
  // `display_name` is omitted. This id is also used as the unique identifier
  // when checking for guest policy conflicts.
  string id = 1;

  // The display name of the repository.
  string display_name = 2;

  // The location of the repository directory.
  string base_url = 3;

  // URIs of GPG keys.
  repeated string gpg_keys = 4;
}

// Represents a single Zypper package repository. This repository is added to a
// repo file that is stored at `/etc/zypp/repos.d/google_osconfig.repo`.
message ZypperRepository {
  // A one word, unique name for this repository. This is
  // the `repo id` in the zypper config file and also the `display_name` if
  // `display_name` is omitted. This id is also used as the unique identifier
  // when checking for guest policy conflicts.
  string id = 1;

  // The display name of the repository.
  string display_name = 2;

  // The location of the repository directory.
  string base_url = 3;

  // URIs of GPG keys.
  repeated string gpg_keys = 4;
}

// Represents a Goo package repository. These is added to a repo file
// that is stored at C:/ProgramData/GooGet/repos/google_osconfig.repo.
message GooRepository {
  // The name of the repository.
  string name = 1;

  // The url of the repository.
  string url = 2;
}

// A package repository.
message PackageRepository {
  // A specific type of repository.
  oneof repository {
    // An Apt Repository.
    AptRepository apt = 1;

    // A Yum Repository.
    YumRepository yum = 2;

    // A Zypper Repository.
    ZypperRepository zypper = 3;

    // A Goo Repository.
    GooRepository goo = 4;
  }
}

// A software recipe is a set of instructions for installing and configuring a
// piece of software. It consists of a set of artifacts that are
// downloaded, and a set of steps that install, configure, and/or update the
// software.
//
// Recipes support installing and updating software from artifacts in the
// following formats:
// Zip archive, Tar archive, Windows MSI, Debian package, and RPM package.
//
// Additionally, recipes support executing a script (either defined in a file or
// directly in this api) in bash, sh, cmd, and powershell.
//
// Updating a software recipe
//
// If a recipe is assigned to an instance and there is a recipe with the same
// name but a lower version already installed and the assigned state
// of the recipe is `INSTALLED_KEEP_UPDATED`, then the recipe is updated to
// the new version.
//
// Script Working Directories
//
// Each script or execution step is run in its own temporary directory which
// is deleted after completing the step.
message SoftwareRecipe {
  // Specifies a resource to be used in the recipe.
  message Artifact {
    // Specifies an artifact available via some URI.
    message Remote {
      // URI from which to fetch the object. It should contain both the protocol
      // and path following the format {protocol}://{location}.
      string uri = 1;

      // Must be provided if `allow_insecure` is `false`.
      // SHA256 checksum in hex format, to compare to the checksum of the
      // artifact. If the checksum is not empty and it doesn't match the
      // artifact then the recipe installation fails before running any of the
      // steps.
      string checksum = 2;
    }

    // Specifies an artifact available as a Cloud Storage object.
    message Gcs {
      // Bucket of the Cloud Storage object.
      // Given an example URL:
      // `https://storage.googleapis.com/my-bucket/foo/bar#1234567`
      // this value would be `my-bucket`.
      string bucket = 1;

      // Name of the Cloud Storage object.
      // As specified [here]
      // (https://cloud.google.com/storage/docs/naming#objectnames)
      // Given an example URL:
      // `https://storage.googleapis.com/my-bucket/foo/bar#1234567`
      // this value would be `foo/bar`.
      string object = 2;

      // Must be provided if allow_insecure is false.
      // Generation number of the Cloud Storage object.
      // `https://storage.googleapis.com/my-bucket/foo/bar#1234567`
      // this value would be `1234567`.
      int64 generation = 3;
    }

    // Id of the artifact, which the installation and update steps of this
    // recipe can reference. Artifacts in a recipe cannot have the same id.
    string id = 1;

    // A specific type of artifact.
    oneof artifact {
      // A generic remote artifact.
      Remote remote = 2;

      // A Cloud Storage artifact.
      Gcs gcs = 3;
    }

    // Defaults to false. When false, recipes are subject to validations
    // based on the artifact type:
    //
    // Remote: A checksum must be specified, and only protocols with
    //         transport-layer security are permitted.
    // GCS:    An object generation number must be specified.
    bool allow_insecure = 4;
  }

  // An action that can be taken as part of installing or updating a recipe.
  message Step {
    // Copies the artifact to the specified path on the instance.
    message CopyFile {
      // The id of the relevant artifact in the recipe.
      string artifact_id = 1;

      // The absolute path on the instance to put the file.
      string destination = 2;

      // Whether to allow this step to overwrite existing files. If this is
      // false and the file already exists the file is not overwritten
      // and the step is considered a success. Defaults to false.
      bool overwrite = 3;

      // Consists of three octal digits which represent, in
      // order, the permissions of the owner, group, and other users for the
      // file (similarly to the numeric mode used in the linux chmod utility).
      // Each digit represents a three bit number with the 4 bit
      // corresponding to the read permissions, the 2 bit corresponds to the
      // write bit, and the one bit corresponds to the execute permission.
      // Default behavior is 755.
      //
      // Below are some examples of permissions and their associated values:
      // read, write, and execute: 7
      // read and execute: 5
      // read and write: 6
      // read only: 4
      string permissions = 4;
    }

    // Extracts an archive of the type specified in the specified directory.
    message ExtractArchive {
      // Specifying the type of archive.
      enum ArchiveType {
        // Indicates that the archive type isn't specified.
        ARCHIVE_TYPE_UNSPECIFIED = 0;

        // Indicates that the archive is a tar archive with no encryption.
        TAR = 1;

        // Indicates that the archive is a tar archive with gzip encryption.
        TAR_GZIP = 2;

        // Indicates that the archive is a tar archive with bzip encryption.
        TAR_BZIP = 3;

        // Indicates that the archive is a tar archive with lzma encryption.
        TAR_LZMA = 4;

        // Indicates that the archive is a tar archive with xz encryption.
        TAR_XZ = 5;

        // Indicates that the archive is a zip archive.
        ZIP = 11;
      }

      // The id of the relevant artifact in the recipe.
      string artifact_id = 1;

      // Directory to extract archive to.
      // Defaults to `/` on Linux or `C:\` on Windows.
      string destination = 2;

      // The type of the archive to extract.
      ArchiveType type = 3;
    }

    // Installs an MSI file.
    message InstallMsi {
      // The id of the relevant artifact in the recipe.
      string artifact_id = 1;

      // The flags to use when installing the MSI
      // defaults to ["/i"] (i.e. the install flag).
      repeated string flags = 2;

      // Return codes that indicate that the software installed or updated
      // successfully. Behaviour defaults to [0]
      repeated int32 allowed_exit_codes = 3;
    }

    // Installs a deb via dpkg.
    message InstallDpkg {
      // The id of the relevant artifact in the recipe.
      string artifact_id = 1;
    }

    // Installs an rpm file via the rpm utility.
    message InstallRpm {
      // The id of the relevant artifact in the recipe.
      string artifact_id = 1;
    }

    // Executes an artifact or local file.
    message ExecFile {
      // Location of the file to execute.
      oneof location_type {
        // The id of the relevant artifact in the recipe.
        string artifact_id = 1;

        // The absolute path of the file on the local filesystem.
        string local_path = 2;
      }

      // Arguments to be passed to the provided executable.
      repeated string args = 3;

      // Defaults to [0]. A list of possible return values that the program
      // can return to indicate a success.
      repeated int32 allowed_exit_codes = 4;
    }

    // Runs a script through an interpreter.
    message RunScript {
      // The interpreter used to execute a script.
      enum Interpreter {
        // Default value for ScriptType.
        INTERPRETER_UNSPECIFIED = 0;

        // Indicates that the script is run with `/bin/sh` on Linux and `cmd`
        // on windows.
        SHELL = 1;

        // Indicates that the script is run with powershell.
        POWERSHELL = 3;
      }

      // The shell script to be executed.
      string script = 1;

      // Return codes that indicate that the software installed or updated
      // successfully. Behaviour defaults to [0]
      repeated int32 allowed_exit_codes = 2;

      // The script interpreter to use to run the script. If no interpreter is
      // specified the script is executed directly, which likely
      // only succeed for scripts with
      // [shebang lines](https://en.wikipedia.org/wiki/Shebang_(Unix)).
      Interpreter interpreter = 3;
    }

    // A specific type of step.
    oneof step {
      // Copies a file onto the instance.
      CopyFile file_copy = 1;

      // Extracts an archive into the specified directory.
      ExtractArchive archive_extraction = 2;

      // Installs an MSI file.
      InstallMsi msi_installation = 3;

      // Installs a deb file via dpkg.
      InstallDpkg dpkg_installation = 4;

      // Installs an rpm file via the rpm utility.
      InstallRpm rpm_installation = 5;

      // Executes an artifact or local file.
      ExecFile file_exec = 6;

      // Runs commands in a shell.
      RunScript script_run = 7;
    }
  }

  // Unique identifier for the recipe. Only one recipe with a given name is
  // installed on an instance.
  //
  // Names are also used to identify resources which helps to determine whether
  // guest policies have conflicts. This means that requests to create multiple
  // recipes with the same name and version are rejected since they
  // could potentially have conflicting assignments.
  string name = 1;

  // The version of this software recipe. Version can be up to 4 period
  // separated numbers (e.g. 12.34.56.78).
  string version = 2;

  // Resources available to be used in the steps in the recipe.
  repeated Artifact artifacts = 3;

  // Actions to be taken for installing this recipe. On failure it stops
  // executing steps and does not attempt another installation. Any steps taken
  // (including partially completed steps) are not rolled back.  Install steps
  // must be specified and are used on first installation.
  repeated Step install_steps = 4;

  // Actions to be taken for updating this recipe. On failure it stops
  // executing steps and  does not attempt another update for this recipe. Any
  // steps taken (including partially completed steps) are not rolled back.
  // Upgrade steps are not mandatory and are only used when upgrading.
  repeated Step update_steps = 5;

  // Default is INSTALLED. The desired state the agent should maintain for this
  // recipe.
  //
  // INSTALLED: The software recipe is installed on the instance but won't be
  //                         updated to new versions.
  // UPDATED: The software recipe is installed on the instance. The recipe is
  //                         updated to a higher version, if a higher version of
  //                         the recipe is assigned to this instance.
  // REMOVE: Remove is unsupported for software recipes and attempts to
  //         create or update a recipe to the REMOVE state is rejected.
  DesiredState desired_state = 6;
}

// A request message for getting effective policy assigned to the instance.
message LookupEffectiveGuestPolicyRequest {
  // Required. This is the GCE instance identity token described in
  // https://cloud.google.com/compute/docs/instances/verifying-instance-identity
  // where the audience is 'osconfig.googleapis.com' and the format is 'full'.
  string instance_id_token = 1 [(google.api.field_behavior) = REQUIRED];

  // Short name of the OS running on the instance. The OS Config agent only
  // provideS this field for targeting if OS Inventory is enabled for that
  // instance.
  string os_short_name = 2;

  // Version of the OS running on the instance. The OS Config agent only
  // provide this field for targeting if OS Inventory is enabled for that
  // VM instance.
  string os_version = 3;

  // Architecture of OS running on the instance. The OS Config agent only
  // provide this field for targeting if OS Inventory is enabled for that
  // instance.
  string os_architecture = 4;
}

// The effective guest policy assigned to the instance.
message EffectiveGuestPolicy {
  // A guest policy package including its source.
  message SourcedPackage {
    // Name of the guest policy providing this config.
    string source = 1;

    // A software package to configure on the VM instance.
    Package package = 2;
  }

  // A guest policy package repository including its source.
  message SourcedPackageRepository {
    // Name of the guest policy providing this config.
    string source = 1;

    // A software package repository to configure on the VM instance.
    PackageRepository package_repository = 2;
  }

  // A guest policy recipe including its source.
  message SourcedSoftwareRecipe {
    // Name of the guest policy providing this config.
    string source = 1;

    // A software recipe to configure on the VM instance.
    SoftwareRecipe software_recipe = 2;
  }

  // List of package configurations assigned to the VM instance.
  repeated SourcedPackage packages = 1;

  // List of package repository configurations assigned to the VM instance.
  repeated SourcedPackageRepository package_repositories = 2;

  // List of recipes assigned to the VM instance.
  repeated SourcedSoftwareRecipe software_recipes = 3;
}