class Google::Apis::ContainerV1::UpgradeSettings

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

max_surge[RW]

The maximum number of nodes that can be created beyond the current size of the node pool during the upgrade process. Corresponds to the JSON property `maxSurge` @return [Fixnum]

max_unavailable[RW]

The maximum number of nodes that can be simultaneously unavailable during the upgrade process. A node is considered available if its status is Ready. Corresponds to the JSON property `maxUnavailable` @return [Fixnum]

Public Class Methods

new(**args) click to toggle source
# File lib/google/apis/container_v1/classes.rb, line 4880
def initialize(**args)
   update!(**args)
end

Public Instance Methods

update!(**args) click to toggle source

Update properties of this object

# File lib/google/apis/container_v1/classes.rb, line 4885
def update!(**args)
  @max_surge = args[:max_surge] if args.key?(:max_surge)
  @max_unavailable = args[:max_unavailable] if args.key?(:max_unavailable)
end