xintongsong commented on a change in pull request #13255:
URL: https://github.com/apache/flink/pull/13255#discussion_r491805839
##########
File path:
flink-kubernetes/src/main/java/org/apache/flink/kubernetes/configuration/KubernetesConfigOptions.java
##########
@@ -220,6 +220,13 @@
.withDescription("The user-specified annotations that
are set to the rest Service. The value should be " +
"in the form of a1:v1,a2:v2");
+ public static final ConfigOption<String> KERBEROS_KRB5_PATH =
+ key("kubernetes.kerberos.krb5-conf.path")
+ .stringType()
+ .noDefaultValue()
+ .withDescription("Specify the local location of the
krb5.conf file to be mounted on the JobManager and " +
+ "TaskManager for Kerberos. Note: The KDC
defined needs to be visible from inside the containers.");
Review comment:
Why is this configuration option only needed for the Kubernetes
deployment? My gut feeling is that this should be a common feature for all the
deployments. Why does the Kubernetes deployment needs a configuration option
that other deployments don't need?
##########
File path:
flink-kubernetes/src/test/java/org/apache/flink/kubernetes/kubeclient/decorators/KerberosMountDecoratorTest.java
##########
@@ -0,0 +1,147 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.kubernetes.kubeclient.decorators;
+
+import org.apache.flink.configuration.SecurityOptions;
+import org.apache.flink.kubernetes.configuration.KubernetesConfigOptions;
+import org.apache.flink.kubernetes.kubeclient.FlinkPod;
+import org.apache.flink.kubernetes.kubeclient.KubernetesJobManagerTestBase;
+import org.apache.flink.kubernetes.utils.Constants;
+
+import io.fabric8.kubernetes.api.model.ConfigMap;
+import io.fabric8.kubernetes.api.model.Container;
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.kubernetes.api.model.KeyToPathBuilder;
+import io.fabric8.kubernetes.api.model.Volume;
+import io.fabric8.kubernetes.api.model.VolumeBuilder;
+import io.fabric8.kubernetes.api.model.VolumeMount;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThat;
+
+/**
+ * General tests for the {@link KerberosMountDecoratorTest}.
+ */
+public class KerberosMountDecoratorTest extends KubernetesJobManagerTestBase {
Review comment:
Why is this class extends `KubernetesJobManagerTestBase`? It seems this
test class can extends either `KubernetesJobManagerTestBase` or
`KubernetesTaskManagerTestBase`, but cannot extends `KubernetesTestBase`. I
think this is an indicator of bad abstraction. We may have another common base
class for jobmanager/taskmanager test bases.
##########
File path:
flink-kubernetes/src/main/java/org/apache/flink/kubernetes/kubeclient/decorators/KerberosMountDecorator.java
##########
@@ -0,0 +1,160 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.kubernetes.kubeclient.decorators;
+
+import org.apache.flink.kubernetes.configuration.KubernetesConfigOptions;
+import org.apache.flink.kubernetes.kubeclient.FlinkPod;
+import
org.apache.flink.kubernetes.kubeclient.parameters.AbstractKubernetesParameters;
+import org.apache.flink.kubernetes.utils.Constants;
+import org.apache.flink.runtime.security.SecurityConfiguration;
+import org.apache.flink.util.StringUtils;
+
+import org.apache.flink.shaded.guava18.com.google.common.io.Files;
+
+import io.fabric8.kubernetes.api.model.ConfigMapBuilder;
+import io.fabric8.kubernetes.api.model.ContainerBuilder;
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.kubernetes.api.model.KeyToPathBuilder;
+import io.fabric8.kubernetes.api.model.PodBuilder;
+import io.fabric8.kubernetes.api.model.SecretBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.List;
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+
+/**
+ * Mount the custom Kerberos Configuration and Credential to the
JobManager(s)/TaskManagers.
+ */
+public class KerberosMountDecorator extends AbstractKubernetesStepDecorator {
+ private static final Logger LOG =
LoggerFactory.getLogger(KerberosMountDecorator.class);
+
+ private final AbstractKubernetesParameters kubernetesParameters;
+ private final SecurityConfiguration securityConfig;
+
+ public KerberosMountDecorator(AbstractKubernetesParameters
kubernetesParameters) {
+ this.kubernetesParameters = checkNotNull(kubernetesParameters);
+ this.securityConfig = new
SecurityConfiguration(kubernetesParameters.getFlinkConfiguration());
+ }
+
+ @Override
+ public FlinkPod decorateFlinkPod(FlinkPod flinkPod) {
+ PodBuilder podBuilder = new PodBuilder(flinkPod.getPod());
+ ContainerBuilder containerBuilder = new
ContainerBuilder(flinkPod.getMainContainer());
+
+ if
(!StringUtils.isNullOrWhitespaceOnly(securityConfig.getKeytab()) &&
!StringUtils.isNullOrWhitespaceOnly(securityConfig.getPrincipal())) {
+ final File keytab = new
File(securityConfig.getKeytab());
+ podBuilder = podBuilder
+ .editOrNewSpec()
+ .addNewVolume()
+
.withName(Constants.KERBEROS_KEYTAB_VOLUME)
+ .withNewSecret()
+
.withSecretName(getKerberosKeytabSecretName(kubernetesParameters.getClusterId()))
+ .endSecret()
+ .endVolume()
+ .endSpec();
+
+ containerBuilder = containerBuilder
+ .addNewVolumeMount()
+
.withName(Constants.KERBEROS_KEYTAB_VOLUME)
+
.withMountPath(Constants.KERBEROS_KEYTAB_MOUNT_POINT)
+ .endVolumeMount()
+ .addNewEnv()
+
.withName(Constants.ENV_KERBEROS_KEYTAB_PATH)
+ .withValue(String.format("%s/%s",
Constants.KERBEROS_KEYTAB_MOUNT_POINT, keytab.getName()))
+ .endEnv();
+ }
+
+ if
(!StringUtils.isNullOrWhitespaceOnly(kubernetesParameters.getFlinkConfiguration().get(KubernetesConfigOptions.KERBEROS_KRB5_PATH)))
{
+ final File krb5Conf = new
File(kubernetesParameters.getFlinkConfiguration().get(KubernetesConfigOptions.KERBEROS_KRB5_PATH));
+ podBuilder = podBuilder
+ .editOrNewSpec()
+ .addNewVolume()
+
.withName(Constants.KERBEROS_KRB5CONF_VOLUME)
+ .withNewConfigMap()
+
.withName(getKerberosKrb5confConfigMapName(kubernetesParameters.getClusterId()))
+ .withItems(new KeyToPathBuilder()
+ .withKey(krb5Conf.getName())
+ .withPath(krb5Conf.getName())
+ .build())
+ .endConfigMap()
Review comment:
minor: indention
##########
File path:
flink-kubernetes/src/main/java/org/apache/flink/kubernetes/kubeclient/decorators/KerberosMountDecorator.java
##########
@@ -0,0 +1,160 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.kubernetes.kubeclient.decorators;
+
+import org.apache.flink.kubernetes.configuration.KubernetesConfigOptions;
+import org.apache.flink.kubernetes.kubeclient.FlinkPod;
+import
org.apache.flink.kubernetes.kubeclient.parameters.AbstractKubernetesParameters;
+import org.apache.flink.kubernetes.utils.Constants;
+import org.apache.flink.runtime.security.SecurityConfiguration;
+import org.apache.flink.util.StringUtils;
+
+import org.apache.flink.shaded.guava18.com.google.common.io.Files;
+
+import io.fabric8.kubernetes.api.model.ConfigMapBuilder;
+import io.fabric8.kubernetes.api.model.ContainerBuilder;
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.kubernetes.api.model.KeyToPathBuilder;
+import io.fabric8.kubernetes.api.model.PodBuilder;
+import io.fabric8.kubernetes.api.model.SecretBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.List;
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+
+/**
+ * Mount the custom Kerberos Configuration and Credential to the
JobManager(s)/TaskManagers.
+ */
+public class KerberosMountDecorator extends AbstractKubernetesStepDecorator {
+ private static final Logger LOG =
LoggerFactory.getLogger(KerberosMountDecorator.class);
+
+ private final AbstractKubernetesParameters kubernetesParameters;
+ private final SecurityConfiguration securityConfig;
+
+ public KerberosMountDecorator(AbstractKubernetesParameters
kubernetesParameters) {
+ this.kubernetesParameters = checkNotNull(kubernetesParameters);
+ this.securityConfig = new
SecurityConfiguration(kubernetesParameters.getFlinkConfiguration());
+ }
+
+ @Override
+ public FlinkPod decorateFlinkPod(FlinkPod flinkPod) {
+ PodBuilder podBuilder = new PodBuilder(flinkPod.getPod());
+ ContainerBuilder containerBuilder = new
ContainerBuilder(flinkPod.getMainContainer());
+
+ if
(!StringUtils.isNullOrWhitespaceOnly(securityConfig.getKeytab()) &&
!StringUtils.isNullOrWhitespaceOnly(securityConfig.getPrincipal())) {
+ final File keytab = new
File(securityConfig.getKeytab());
+ podBuilder = podBuilder
+ .editOrNewSpec()
+ .addNewVolume()
+
.withName(Constants.KERBEROS_KEYTAB_VOLUME)
+ .withNewSecret()
+
.withSecretName(getKerberosKeytabSecretName(kubernetesParameters.getClusterId()))
+ .endSecret()
+ .endVolume()
+ .endSpec();
+
+ containerBuilder = containerBuilder
+ .addNewVolumeMount()
+
.withName(Constants.KERBEROS_KEYTAB_VOLUME)
+
.withMountPath(Constants.KERBEROS_KEYTAB_MOUNT_POINT)
+ .endVolumeMount()
+ .addNewEnv()
+
.withName(Constants.ENV_KERBEROS_KEYTAB_PATH)
+ .withValue(String.format("%s/%s",
Constants.KERBEROS_KEYTAB_MOUNT_POINT, keytab.getName()))
Review comment:
Instead of decorating the keytab path as an environment variable, I
think we can write it to the configuration directly.
See `FlinkConfMountDecorator#buildAccompanyingKubernetesResources` for an
example.
##########
File path:
flink-kubernetes/src/test/java/org/apache/flink/kubernetes/kubeclient/decorators/KerberosMountDecoratorTest.java
##########
@@ -0,0 +1,147 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.kubernetes.kubeclient.decorators;
+
+import org.apache.flink.configuration.SecurityOptions;
+import org.apache.flink.kubernetes.configuration.KubernetesConfigOptions;
+import org.apache.flink.kubernetes.kubeclient.FlinkPod;
+import org.apache.flink.kubernetes.kubeclient.KubernetesJobManagerTestBase;
+import org.apache.flink.kubernetes.utils.Constants;
+
+import io.fabric8.kubernetes.api.model.ConfigMap;
+import io.fabric8.kubernetes.api.model.Container;
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.kubernetes.api.model.KeyToPathBuilder;
+import io.fabric8.kubernetes.api.model.Volume;
+import io.fabric8.kubernetes.api.model.VolumeBuilder;
+import io.fabric8.kubernetes.api.model.VolumeMount;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThat;
+
+/**
+ * General tests for the {@link KerberosMountDecoratorTest}.
+ */
+public class KerberosMountDecoratorTest extends KubernetesJobManagerTestBase {
+
+ private KerberosMountDecorator kerberosMountDecorator;
+
+ @Override
+ protected void setupFlinkConfig() {
+ super.setupFlinkConfig();
+
+ flinkConfig.set(SecurityOptions.KERBEROS_LOGIN_KEYTAB,
kerberosDir.toString() + "/" + KEYTAB_FILE);
+ flinkConfig.set(SecurityOptions.KERBEROS_LOGIN_PRINCIPAL,
"test");
+ flinkConfig.set(KubernetesConfigOptions.KERBEROS_KRB5_PATH,
kerberosDir.toString() + "/" + KRB5_CONF_FILE);
+ }
+
+ @Override
+ protected void onSetup() throws Exception {
+ super.onSetup();
+
+ generateKerberosFileItems();
+
+ this.kerberosMountDecorator = new
KerberosMountDecorator(kubernetesJobManagerParameters);
+ }
+
+ @Test
+ public void testWhetherPodOrContainerIsDecorated() {
+ final FlinkPod resultFlinkPod =
kerberosMountDecorator.decorateFlinkPod(baseFlinkPod);
+ assertNotEquals(baseFlinkPod.getPod(), resultFlinkPod.getPod());
+ assertNotEquals(baseFlinkPod.getMainContainer(),
resultFlinkPod.getMainContainer());
+ }
+
+ @Test
+ public void testConfigMap() throws IOException {
+ final List<HasMetadata> additionalResources =
kerberosMountDecorator.buildAccompanyingKubernetesResources();
+ assertEquals(2, additionalResources.size());
+
+ final ConfigMap resultConfigMap = (ConfigMap)
additionalResources
+ .stream()
+ .filter(x -> x instanceof ConfigMap)
+ .collect(Collectors.toList()).get(0);
+
+ assertEquals(Constants.API_VERSION,
resultConfigMap.getApiVersion());
+
+
assertEquals(KerberosMountDecorator.getKerberosKrb5confConfigMapName(CLUSTER_ID),
+ resultConfigMap.getMetadata().getName());
+
+ Map<String, String> resultDatas = resultConfigMap.getData();
+ assertThat(resultDatas.size(), is(1));
+ assertEquals("some conf", resultDatas.get(KRB5_CONF_FILE));
+ }
+
+ @Test
+ public void testDecoratedFlinkPod() {
+ final FlinkPod resultFlinkPod =
kerberosMountDecorator.decorateFlinkPod(baseFlinkPod);
+ assertEquals(2,
resultFlinkPod.getPod().getSpec().getVolumes().size());
+
+ final List<Volume> expectedVolumes = Arrays.asList(
+ new VolumeBuilder()
+ .withName(Constants.KERBEROS_KEYTAB_VOLUME)
+ .withNewSecret()
+
.withSecretName(KerberosMountDecorator.getKerberosKeytabSecretName(CLUSTER_ID))
+ .endSecret()
+ .build(),
+ new VolumeBuilder()
+ .withName(Constants.KERBEROS_KRB5CONF_VOLUME)
+ .withNewConfigMap()
+
.withName(KerberosMountDecorator.getKerberosKrb5confConfigMapName(CLUSTER_ID))
+ .withItems(new KeyToPathBuilder()
+ .withKey(KRB5_CONF_FILE)
+ .withPath(KRB5_CONF_FILE)
+ .build())
+ .endConfigMap()
+ .build());
+ assertEquals(expectedVolumes,
resultFlinkPod.getPod().getSpec().getVolumes());
+ }
Review comment:
I think this test case is not needed. It is already covered by
`testDecoratedFlinkContainer`. Despite it is required to mount the volumes on
the pods before mounting them on the containers, from the contract we only
cares about accessing the resources in container.
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