Kubernetes ConfigMap Store
The Kubernetes ConfigMap Store extends the Vert.x Configuration Retriever and provides support Kubernetes Config Map and Secrets. So, configuration is retrieved by reading the config map or the secrets.
Using the Kubernetes ConfigMap Store
To use the Kubernetes ConfigMap Store, add the following dependency to the dependencies section of your build descriptor:
-
Maven (in your
pom.xml):
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-config-kubernetes-configmap</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-config</artifactId>
<version>4.0.1</version>
</dependency>
-
Gradle (in your
build.gradlefile):
compile 'io.vertx:vertx-config:4.0.1'
compile 'io.vertx:vertx-config-kubernetes-configmap:4.0.1'
Configuring the store
Once added to your classpath or dependencies, you need to configure the
ConfigRetriever to use this store:
ConfigStoreOptions store = new ConfigStoreOptions()
.setType("configmap")
.setConfig(new JsonObject()
.put("namespace", "my-project-namespace")
.put("name", "configmap-name")
);
ConfigRetriever retriever = ConfigRetriever.create(vertx,
new ConfigRetrieverOptions().addStore(store));
You need to configure the store to find the right configmap. this is done with:
-
namespace- the project namespace,defaultby default. If theKUBERNETES_NAMESPACEENV variable is set, it uses this value. -
name- the name of the config map -
optional- whether or not the config map is optional (trueby default)
If the config map is composed by several element, you can use the key parameter to tell
which key is read
The application must have the permissions to read the config map.
To read data from a secret, just configure the secret property to true:
ConfigStoreOptions store = new ConfigStoreOptions()
.setType("configmap")
.setConfig(new JsonObject()
.put("namespace", "my-project-namespace")
.put("name", "my-secret")
.put("secret", true)
);
ConfigRetriever retriever = ConfigRetriever.create(vertx,
new ConfigRetrieverOptions().addStore(store));
If the config map is not available, an empty JSON object is passed as configuration chunk. To disable this
behavior and explicitly fail, you can set the optional configuration to false.