nielsbasjes commented on a change in pull request #11245:
URL: https://github.com/apache/flink/pull/11245#discussion_r442811725
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File path:
flink-kubernetes/src/main/java/org/apache/flink/kubernetes/configuration/KubernetesConfigOptions.java
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@@ -137,11 +138,17 @@
.withDescription("The cluster-id, which should be no more than
45 characters, is used for identifying " +
"a unique Flink cluster. If not set, the client will
automatically generate it with a random ID.");
+ // The default container image that ties to the exact needed versions
of both Flink and Scala.
+ public static final String DEFAULT_CONTAINER_IMAGE = "flink:" +
EnvironmentInformation.getVersion() + "-scala_" +
EnvironmentInformation.getScalaVersion();
+
public static final ConfigOption<String> CONTAINER_IMAGE =
key("kubernetes.container.image")
.stringType()
- .defaultValue("flink:latest")
- .withDescription("Image to use for Flink containers.");
+ .defaultValue(DEFAULT_CONTAINER_IMAGE)
+ .withDescription("Image to use for Flink containers. " +
+ "The specified image MUST be based upon Apache Flink " +
+ EnvironmentInformation.getVersion() + " that uses Scala
" + EnvironmentInformation.getScalaVersion() + " . " +
Review comment:
By doing this default container image without the scala version would
let the problem exist I intended to solve. Actually the version should "flip
flop" with the scala it was built against, just not in the documentation.
So I thought of a different way to stabilized the version just for the
documentation. It is a bit onorthodox so I'm curious to hear what you think of
this direction.
The alternative direction I had in mind would be extending the ConfigOption
with something like "defaultValueForDocumentation".
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