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Simplify evaluation.

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This commit is contained in:
Michael Lipp 2023-08-14 15:45:16 +02:00
parent 04535a0e72
commit e7f572a954
1 changed files with 26 additions and 33 deletions
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49
org.jdrupes.vmoperator.manager/src/org/jdrupes/vmoperator/manager/StsReconciler.java
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@ -18,7 +18,6 @@
package org.jdrupes.vmoperator.manager;
import com.google.gson.JsonObject;
import freemarker.template.Configuration;
import freemarker.template.TemplateException;
import io.kubernetes.client.custom.V1Patch;
@ -65,45 +64,24 @@ import org.jdrupes.vmoperator.manager.VmDefChanged.Type;
throws IOException, TemplateException, ApiException {
DynamicKubernetesApi stsApi = new DynamicKubernetesApi("apps", "v1",
"statefulsets", channel.client());
// If exists, adjust replicas
var metadata = event.object().getMetadata();
var existing = K8s.get(stsApi, metadata);
if (existing.isPresent()) {
var current = GsonPtr.to(existing.get().getRaw())
.to("spec").getAsInt("replicas").orElse(1);
int desired;
// Maybe delete
if (event.type() == Type.DELETED) {
desired = 0;
} else {
var state = GsonPtr.to((JsonObject) model.get("cr"))
.to("spec", "vm").getAsString("state").orElse("Stopped");
desired = "Running".equals(state) ? 1 : 0;
}
if (desired != current) {
// First set replicas to 0 ...
PatchOptions opts = new PatchOptions();
opts.setFieldManager("kubernetes-java-kubectl-apply");
stsApi.patch(metadata.getNamespace(), metadata.getName(),
V1Patch.PATCH_FORMAT_JSON_PATCH,
new V1Patch("[{\"op\": \"replace\", \"path\": "
+ "\"/spec/replicas\", \"value\": " + desired + "}]"),
+ "\"/spec/replicas\", \"value\": 0}]"),
opts).throwsApiException();
}
}
// Maybe delete (replicas have been set to 0)
if (event.type() == Type.DELETED) {
// ... then delete
stsApi.delete(metadata.getNamespace(), metadata.getName())
.throwsApiException();
return;
}
// Apart from replicas, only properties that are of no interest
// may be changed for an existing stateful set.
if (existing.isPresent()) {
return;
}
// Combine template and data and parse result
var fmTemplate = fmConfig.getTemplate("runnerSts.ftl.yaml");
StringWriter out = new StringWriter();
@ -111,8 +89,23 @@ import org.jdrupes.vmoperator.manager.VmDefChanged.Type;
// Avoid Yaml.load due to
// https://github.com/kubernetes-client/java/issues/2741
var stsDef = Dynamics.newFromYaml(out.toString());
// If exists apply changes only when transitioning state
// or not running.
var existing = K8s.get(stsApi, metadata);
if (existing.isPresent()) {
var current = GsonPtr.to(existing.get().getRaw())
.to("spec").getAsInt("replicas").orElse(1);
var desired = GsonPtr.to(stsDef.getRaw())
.to("spec").getAsInt("replicas").orElse(1);
if (current == 1 && desired == 1) {
return;
}
}
// Do apply changes
PatchOptions opts = new PatchOptions();
opts.setForce(false);
opts.setForce(true);
opts.setFieldManager("kubernetes-java-kubectl-apply");
stsApi.patch(stsDef.getMetadata().getNamespace(),
stsDef.getMetadata().getName(), V1Patch.PATCH_FORMAT_APPLY_YAML,