java - AppEngine 标准 — 无法在 appengine-web.xml 中将 设置为 0

Question

有了新的rollout AppEngine 的自动缩放器，新的 configuration选项如 min-instances和max-instances添加了自动缩放配置，表示可以，例如将最小实例数设置为 0 以降低成本:

<min-instances>

Optional. The minimum number of instances for App Engine to create for this module version. These instances serve traffic when requests arrive, and continue to serve traffic even when additional instances are started up as required to handle traffic.

Specify a value from 0 to 1000. You can set the parameter to the value 0 to allow scaling to 0 instances to lower costs when no requests are being served. Note that you are charged for the number of instances specified whether they are receiving traffic or not.

但是，关于 xsd仅随 AppEngine 云 SDK 提供的架构 positive-integer可以设置在 min-instances 范围内或max-instances标签:

<xs:complexType name="automatic-scaling-type">
    <xs:all>
      <xs:element type="xs:string" name="min-pending-latency" minOccurs="0"/>
      <xs:element type="xs:string" name="max-pending-latency" minOccurs="0"/>
      <xs:element type="xs:string" name="min-idle-instances" minOccurs="0"/>
      <xs:element type="xs:string" name="max-idle-instances" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="min-instances" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="max-instances" minOccurs="0"/>
      <xs:element type="xs:double" name="target-cpu-utilization" minOccurs="0"/>
      <xs:element type="xs:double" name="target-throughput-utilization" minOccurs="0"/>
      <xs:element type="xs:string" name="max-concurrent-requests" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="min-num-instances" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="max-num-instances" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="cool-down-period-sec" minOccurs="0"/>
      <xs:element type="ns:cpu-utilization-type" name="cpu-utilization" minOccurs="0" xmlns:ns="http://appengine.google.com/ns/1.0"/>
      <xs:element type="xs:positiveInteger" name="target-network-sent-bytes-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-network-sent-packets-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-network-received-bytes-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-network-received-packets-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-disk-write-bytes-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-disk-write-ops-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-disk-read-bytes-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-disk-read-ops-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-request-count-per-sec" minOccurs="0"/>
      <xs:element type="xs:positiveInteger" name="target-concurrent-requests" minOccurs="0"/>
      <xs:element type="ns:flex-custom-metrics-array" name="custom-metrics" minOccurs="0"/>
    </xs:all>
  </xs:complexType>

我确实同意将其设置为正整数对于 max-instances 是有意义的但是min-instances呢？ ？这是文档中的错误或打印错误吗？

Answer 1

这是一个 bug在 Java AppEngine SDK 中，现已使用新的 SDK 版本解决:1.9.64 .