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[FLINK-37515] Basic support for Blue/Green deployments #969
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f6349bf
[FLINK-37515] FLIP-503: Basic support for Blue/Green deployments
schongloo ebab279
Fixing configOption default value management and log message formatting
schongloo 3d91ba4
Optimized/simplified the reconciliation logic for first deployments. …
schongloo 9f099ae
Added Blue/Green Deployments E2E test
schongloo 853547f
- Refactoring (splitting) the Blue/Green controller logic from the Co…
schongloo ee47067
Refactoring for clarity (added BlueGreenTransitionContext)
schongloo 05e9425
Introducing a Blue/Green State Machine
schongloo 79d75bb
Optimizing the State Handling
schongloo d1098bb
Triggering a full transition only when needed, otherwise just patch t…
schongloo 5a3b802
Optimized the B/G unit tests
schongloo c178eae
Adding support for Savepointing before transItion in the case of Upgr…
schongloo a3ab6d6
Updated unit test to assert Savepointing. Checkstyle fixes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| ################################################################################ | ||
| # 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. | ||
| ################################################################################ | ||
|
|
||
| apiVersion: flink.apache.org/v1beta1 | ||
| kind: FlinkBlueGreenDeployment | ||
| metadata: | ||
| name: basic-bluegreen-example | ||
| spec: | ||
| template: | ||
| configuration: | ||
| kubernetes.operator.bluegreen.deployment-deletion.delay: "1s" | ||
| spec: | ||
| image: flink:1.20 | ||
| flinkVersion: v1_20 | ||
| flinkConfiguration: | ||
| rest.port: "8081" | ||
| execution.checkpointing.interval: "1 min" | ||
| execution.checkpointing.storage: "filesystem" | ||
| state.backend.incremental: "true" | ||
| state.checkpoints.dir: "file:///flink-data/checkpoints" | ||
| state.checkpoints.num-retained: "50" | ||
| taskmanager.numberOfTaskSlots: "1" | ||
| serviceAccount: flink | ||
| jobManager: | ||
| resource: | ||
| memory: "2048m" | ||
| cpu: 1 | ||
| podTemplate: | ||
| spec: | ||
| containers: | ||
| - name: flink-main-container | ||
| volumeMounts: | ||
| - mountPath: /flink-data | ||
| name: flink-volume | ||
| volumes: | ||
| - name: flink-volume | ||
| hostPath: | ||
| path: /tmp/flink | ||
| type: Directory | ||
| taskManager: | ||
| resource: | ||
| memory: "2048m" | ||
| cpu: 1 | ||
| job: | ||
| jarURI: local:///opt/flink/examples/streaming/StateMachineExample.jar | ||
| parallelism: 1 | ||
| upgradeMode: stateless |
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|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| #!/usr/bin/env bash | ||
| ################################################################################ | ||
| # 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. | ||
| ################################################################################ | ||
|
|
||
| # This script tests the Flink Blue/Green Deployments support as follows: | ||
| # - Create a FlinkBlueGreenDeployment which automatically starts a "Blue" FlinkDeployment | ||
| # - Once this setup is stable, we trigger a transition which will create the "Green" FlinkDeployment | ||
| # - Once it's stable, verify the "Blue" FlinkDeployment is torn down | ||
| # - Perform additional validation(s) before exiting | ||
|
|
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| SCRIPT_DIR=$(dirname "$(readlink -f "$0")") | ||
| source "${SCRIPT_DIR}/utils.sh" | ||
|
|
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| CLUSTER_ID="basic-bluegreen-example" | ||
| BG_CLUSTER_ID=$CLUSTER_ID | ||
| BLUE_CLUSTER_ID="basic-bluegreen-example-blue" | ||
| GREEN_CLUSTER_ID="basic-bluegreen-example-green" | ||
|
|
||
| APPLICATION_YAML="${SCRIPT_DIR}/data/bluegreen.yaml" | ||
| APPLICATION_IDENTIFIER="flinkbgdep/$CLUSTER_ID" | ||
| BLUE_APPLICATION_IDENTIFIER="flinkdep/$BLUE_CLUSTER_ID" | ||
| GREEN_APPLICATION_IDENTIFIER="flinkdep/$GREEN_CLUSTER_ID" | ||
| TIMEOUT=300 | ||
|
|
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| #echo "BG_CLUSTER_ID " $BG_CLUSTER_ID | ||
| #echo "BLUE_CLUSTER_ID " $BLUE_CLUSTER_ID | ||
| #echo "APPLICATION_IDENTIFIER " $APPLICATION_IDENTIFIER | ||
| #echo "BLUE_APPLICATION_IDENTIFIER " $BLUE_APPLICATION_IDENTIFIER | ||
|
|
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| on_exit cleanup_and_exit "$APPLICATION_YAML" $TIMEOUT $BG_CLUSTER_ID | ||
|
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| retry_times 5 30 "kubectl apply -f $APPLICATION_YAML" || exit 1 | ||
|
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| wait_for_jobmanager_running $BLUE_CLUSTER_ID $TIMEOUT | ||
| wait_for_status $BLUE_APPLICATION_IDENTIFIER '.status.lifecycleState' STABLE ${TIMEOUT} || exit 1 | ||
| wait_for_status $APPLICATION_IDENTIFIER '.status.jobStatus.state' RUNNING ${TIMEOUT} || exit 1 | ||
| wait_for_status $APPLICATION_IDENTIFIER '.status.blueGreenState' ACTIVE_BLUE ${TIMEOUT} || exit 1 | ||
|
|
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| blue_job_id=$(kubectl get -oyaml flinkdep/basic-bluegreen-example-blue | yq '.status.jobStatus.jobId') | ||
|
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| echo "Giving a chance for checkpoints to be generated..." | ||
| sleep 5 | ||
| kubectl patch flinkbgdep ${BG_CLUSTER_ID} --type merge --patch '{"spec":{"template":{"spec":{"flinkConfiguration":{"rest.port":"8082","state.checkpoints.num-retained":"51"}}}}}' | ||
|
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| wait_for_status $GREEN_APPLICATION_IDENTIFIER '.status.lifecycleState' STABLE ${TIMEOUT} || exit 1 | ||
| kubectl wait --for=delete deployment --timeout=${TIMEOUT}s --selector="app=${BLUE_CLUSTER_ID}" | ||
| wait_for_status $APPLICATION_IDENTIFIER '.status.jobStatus.state' RUNNING ${TIMEOUT} || exit 1 | ||
| wait_for_status $APPLICATION_IDENTIFIER '.status.blueGreenState' ACTIVE_GREEN ${TIMEOUT} || exit 1 | ||
|
|
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| green_initialSavepointPath=$(kubectl get -oyaml $GREEN_APPLICATION_IDENTIFIER | yq '.spec.job.initialSavepointPath') | ||
|
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| if [[ $green_initialSavepointPath == '/flink-data/checkpoints/'$blue_job_id* ]]; then | ||
| echo 'Green deployment started from the expected initialSavepointPath: ' $green_initialSavepointPath | ||
| else | ||
| echo 'Unexpected initialSavepointPath: ' $green_initialSavepointPath | ||
| exit 1 | ||
| fi; | ||
|
|
||
| echo "Successfully run the Flink Blue/Green Deployments test" |
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41 changes: 41 additions & 0 deletions
41
...-api/src/main/java/org/apache/flink/kubernetes/operator/api/FlinkBlueGreenDeployment.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * 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.operator.api; | ||
|
|
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| import org.apache.flink.annotation.Experimental; | ||
| import org.apache.flink.kubernetes.operator.api.spec.FlinkBlueGreenDeploymentSpec; | ||
| import org.apache.flink.kubernetes.operator.api.status.FlinkBlueGreenDeploymentStatus; | ||
|
|
||
| import com.fasterxml.jackson.annotation.JsonInclude; | ||
| import com.fasterxml.jackson.databind.annotation.JsonDeserialize; | ||
| import io.fabric8.kubernetes.api.model.Namespaced; | ||
| import io.fabric8.kubernetes.client.CustomResource; | ||
| import io.fabric8.kubernetes.model.annotation.Group; | ||
| import io.fabric8.kubernetes.model.annotation.ShortNames; | ||
| import io.fabric8.kubernetes.model.annotation.Version; | ||
|
|
||
| /** Custom resource definition that represents a deployments with Blue/Green rollout capability. */ | ||
| @Experimental | ||
| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| @JsonDeserialize() | ||
| @Group(CrdConstants.API_GROUP) | ||
| @Version(CrdConstants.API_VERSION) | ||
| @ShortNames({"flinkbgdep"}) | ||
| public class FlinkBlueGreenDeployment | ||
| extends CustomResource<FlinkBlueGreenDeploymentSpec, FlinkBlueGreenDeploymentStatus> | ||
| implements Namespaced {} |
38 changes: 38 additions & 0 deletions
38
...i/src/main/java/org/apache/flink/kubernetes/operator/api/bluegreen/BlueGreenDiffType.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| /* | ||
| * 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.operator.api.bluegreen; | ||
|
|
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| /** | ||
| * Enum representing different types of differences found in Blue/Green deployment specifications. | ||
| */ | ||
| public enum BlueGreenDiffType { | ||
| /** No differences found between specifications. */ | ||
| IGNORE, | ||
|
|
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| /** Only top-level properties (metadata, configuration) have differences. */ | ||
| PATCH_TOP_LEVEL, | ||
|
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| /** Only the nested FlinkDeploymentSpec has differences. */ | ||
| PATCH_CHILD, | ||
|
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| /** Both top-level and nested specifications have differences. */ | ||
| PATCH_BOTH, | ||
|
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| /** The nested spec has SCALE or UPGRADE differences, requiring a blue/green transition. */ | ||
| TRANSITION | ||
| } | ||
39 changes: 39 additions & 0 deletions
39
...-api/src/main/java/org/apache/flink/kubernetes/operator/api/bluegreen/DeploymentType.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.flink.kubernetes.operator.api.bluegreen; | ||
|
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| import org.apache.flink.kubernetes.operator.api.FlinkDeployment; | ||
|
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| /** | ||
| * Enumeration of the two possible Flink Blue/Green deployment types. Only one of each type will be | ||
| * present at all times for a particular job. | ||
| */ | ||
| public enum DeploymentType { | ||
| /** Identifier for the first or "Blue" deployment type. */ | ||
| BLUE, | ||
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| /** Identifier for the second or "Green" deployment type. */ | ||
| GREEN; | ||
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| public static final String LABEL_KEY = "flink/blue-green-deployment-type"; | ||
|
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| public static DeploymentType fromDeployment(FlinkDeployment flinkDeployment) { | ||
| String typeAnnotation = flinkDeployment.getMetadata().getLabels().get(LABEL_KEY); | ||
| return DeploymentType.valueOf(typeAnnotation); | ||
| } | ||
| } | ||
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What's the functional difference between IGNORE the different PATCH diffs and TRANSITION? Feels like we should have only 3:
NO_CHANGE
OPERATOR_CONFIG_ONLY -> Non-upgrade/scale deployment changes
UPGRADE