# Copyright 2019 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.

# NOTE: This file is auto generated by the elixir code generator program.
# Do not edit this file manually.

defmodule GoogleApi.Container.V1.Model.UpgradeSettings do
  @moduledoc """
  These upgrade settings control the level of parallelism and the level of disruption caused by an upgrade. maxUnavailable controls the number of nodes that can be simultaneously unavailable. maxSurge controls the number of additional nodes that can be added to the node pool temporarily for the time of the upgrade to increase the number of available nodes. (maxUnavailable + maxSurge) determines the level of parallelism (how many nodes are being upgraded at the same time). Note: upgrades inevitably introduce some disruption since workloads need to be moved from old nodes to new, upgraded ones. Even if maxUnavailable=0, this holds true. (Disruption stays within the limits of PodDisruptionBudget, if it is configured.) Consider a hypothetical node pool with 5 nodes having maxSurge=2, maxUnavailable=1. This means the upgrade process upgrades 3 nodes simultaneously. It creates 2 additional (upgraded) nodes, then it brings down 3 old (not yet upgraded) nodes at the same time. This ensures that there are always at least 4 nodes available.

  ## Attributes

  *   `maxSurge` (*type:* `integer()`, *default:* `nil`) - The maximum number of nodes that can be created beyond the current size of the node pool during the upgrade process.
  *   `maxUnavailable` (*type:* `integer()`, *default:* `nil`) - The maximum number of nodes that can be simultaneously unavailable during the upgrade process. A node is considered available if its status is Ready.
  """

  use GoogleApi.Gax.ModelBase

  @type t :: %__MODULE__{
          :maxSurge => integer() | nil,
          :maxUnavailable => integer() | nil
        }

  field(:maxSurge)
  field(:maxUnavailable)
end

defimpl Poison.Decoder, for: GoogleApi.Container.V1.Model.UpgradeSettings do
  def decode(value, options) do
    GoogleApi.Container.V1.Model.UpgradeSettings.decode(value, options)
  end
end

defimpl Poison.Encoder, for: GoogleApi.Container.V1.Model.UpgradeSettings do
  def encode(value, options) do
    GoogleApi.Gax.ModelBase.encode(value, options)
  end
end