发布配置分析

1.发布配置

2.controller接口

@PreAuthorize(value = "@permissionValidator.hasReleaseNamespacePermission(#appId, #namespaceName, #env)")
  @PostMapping(value = "/apps/{appId}/envs/{env}/clusters/{clusterName}/namespaces/{namespaceName}/releases")
  public ReleaseDTO createRelease(@PathVariable String appId,
                                  @PathVariable String env, @PathVariable String clusterName,
                                  @PathVariable String namespaceName, @RequestBody NamespaceReleaseModel model) {
    model.setAppId(appId);
    model.setEnv(env);
    model.setClusterName(clusterName);
    model.setNamespaceName(namespaceName);

    if (model.isEmergencyPublish() && !portalConfig.isEmergencyPublishAllowed(Env.valueOf(env))) {
      throw new BadRequestException(String.format("Env: %s is not supported emergency publish now", env));
    }
    // 3.release服务执行publish方法
    ReleaseDTO createdRelease = releaseService.publish(model);

    ConfigPublishEvent event = ConfigPublishEvent.instance();
    event.withAppId(appId)
        .withCluster(clusterName)
        .withNamespace(namespaceName)
        .withReleaseId(createdRelease.getId())
        .setNormalPublishEvent(true)
        .setEnv(Env.valueOf(env));
    // 4.发布事件
    publisher.publishEvent(event);

    return createdRelease;
  }

3.releaseService.publish方法

public ReleaseDTO publish(NamespaceReleaseModel model) {
    Env env = model.getEnv();
    boolean isEmergencyPublish = model.isEmergencyPublish();
    String appId = model.getAppId();
    String clusterName = model.getClusterName();
    String namespaceName = model.getNamespaceName();
    String releaseBy = StringUtils.isEmpty(model.getReleasedBy()) ?
                       userInfoHolder.getUser().getUserId() : model.getReleasedBy();

    ReleaseDTO releaseDTO = releaseAPI.createRelease(appId, env, clusterName, namespaceName,
                                                     model.getReleaseTitle(), model.getReleaseComment(),
                                                     releaseBy, isEmergencyPublish);

    Tracer.logEvent(TracerEventType.RELEASE_NAMESPACE,
                    String.format("%s+%s+%s+%s", appId, env, clusterName, namespaceName));

    return releaseDTO;
  }

3.1 releaseAPI.createRelease创建release

public ReleaseDTO createRelease(String appId, Env env, String clusterName, String namespace,
        String releaseName, String releaseComment, String operator,
        boolean isEmergencyPublish) {
      HttpHeaders headers = new HttpHeaders();
      headers.setContentType(MediaType.parseMediaType(MediaType.APPLICATION_FORM_URLENCODED_VALUE + ";charset=UTF-8"));
      MultiValueMap<String, String> parameters = new LinkedMultiValueMap<>();
      parameters.add("name", releaseName);
      parameters.add("comment", releaseComment);
      parameters.add("operator", operator);
      parameters.add("isEmergencyPublish", String.valueOf(isEmergencyPublish));
      HttpEntity<MultiValueMap<String, String>> entity =
          new HttpEntity<>(parameters, headers);
      ReleaseDTO response = restTemplate.post(
          env, "apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/releases", entity,
          ReleaseDTO.class, appId, clusterName, namespace);
      return response;
    }

发送http请求给adminService模块

3.2 adminService模块接受到请求,处理release逻辑

@Transactional
  @PostMapping("/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/releases")
  public ReleaseDTO publish(@PathVariable("appId") String appId,
                            @PathVariable("clusterName") String clusterName,
                            @PathVariable("namespaceName") String namespaceName,
                            @RequestParam("name") String releaseName,
                            @RequestParam(name = "comment", required = false) String releaseComment,
                            @RequestParam("operator") String operator,
                            @RequestParam(name = "isEmergencyPublish", defaultValue = "false") boolean isEmergencyPublish) {
    Namespace namespace = namespaceService.findOne(appId, clusterName, namespaceName);
    if (namespace == null) {
      throw new NotFoundException(String.format("Could not find namespace for %s %s %s", appId,
                                                clusterName, namespaceName));
    }
    Release release = releaseService.publish(namespace, releaseName, releaseComment, operator, isEmergencyPublish);

    //send release message
    Namespace parentNamespace = namespaceService.findParentNamespace(namespace);
    String messageCluster;
    if (parentNamespace != null) {
      messageCluster = parentNamespace.getClusterName();
    } else {
      messageCluster = clusterName;
    }
    messageSender.sendMessage(ReleaseMessageKeyGenerator.generate(appId, messageCluster, namespaceName),
                              Topics.APOLLO_RELEASE_TOPIC);
    return BeanUtils.transform(ReleaseDTO.class, release);
  }

3.3 releaseService.publish

@Transactional
  public Release publish(Namespace namespace, String releaseName, String releaseComment,
                         String operator, boolean isEmergencyPublish) {

    checkLock(namespace, isEmergencyPublish, operator);

    Map<String, String> operateNamespaceItems = getNamespaceItems(namespace);

    Namespace parentNamespace = namespaceService.findParentNamespace(namespace);

    //branch release
    if (parentNamespace != null) {
      return publishBranchNamespace(parentNamespace, namespace, operateNamespaceItems,
                                    releaseName, releaseComment, operator, isEmergencyPublish);
    }

    Namespace childNamespace = namespaceService.findChildNamespace(namespace);

    Release previousRelease = null;
    if (childNamespace != null) {
      previousRelease = findLatestActiveRelease(namespace);
    }

    //master release
    Map<String, Object> operationContext = Maps.newHashMap();
    operationContext.put(ReleaseOperationContext.IS_EMERGENCY_PUBLISH, isEmergencyPublish);
    // 将数据写到Release表中
    Release release = masterRelease(namespace, releaseName, releaseComment, operateNamespaceItems,
                                    operator, ReleaseOperation.NORMAL_RELEASE, operationContext);

    //merge to branch and auto release
    if (childNamespace != null) {
      mergeFromMasterAndPublishBranch(namespace, childNamespace, operateNamespaceItems,
                                      releaseName, releaseComment, operator, previousRelease,
                                      release, isEmergencyPublish);
    }

    return release;
  }

看看publishBranchNamespace做了什么

  @Transactional
  public Release publish(Namespace namespace, String releaseName, String releaseComment,
                         String operator, boolean isEmergencyPublish) {

    checkLock(namespace, isEmergencyPublish, operator);

    Map<String, String> operateNamespaceItems = getNamespaceItems(namespace);

    Namespace parentNamespace = namespaceService.findParentNamespace(namespace);

    //branch release
    if (parentNamespace != null) {
      return publishBranchNamespace(parentNamespace, namespace, operateNamespaceItems,
                                    releaseName, releaseComment, operator, isEmergencyPublish);
    }

    Namespace childNamespace = namespaceService.findChildNamespace(namespace);

    Release previousRelease = null;
    if (childNamespace != null) {
      previousRelease = findLatestActiveRelease(namespace);
    }

    //master release
    Map<String, Object> operationContext = Maps.newHashMap();
    operationContext.put(ReleaseOperationContext.IS_EMERGENCY_PUBLISH, isEmergencyPublish);
    // 发布release
    Release release = masterRelease(namespace, releaseName, releaseComment, operateNamespaceItems,
                                    operator, ReleaseOperation.NORMAL_RELEASE, operationContext);

    //merge to branch and auto release
    if (childNamespace != null) {
      mergeFromMasterAndPublishBranch(namespace, childNamespace, operateNamespaceItems,
                                      releaseName, releaseComment, operator, previousRelease,
                                      release, isEmergencyPublish);
    }

    return release;
  }

更新release的逻辑masterRelease

private Release masterRelease(Namespace namespace, String releaseName, String releaseComment,
                                Map<String, String> configurations, String operator,
                                int releaseOperation, Map<String, Object> operationContext) {
    Release lastActiveRelease = findLatestActiveRelease(namespace);
    long previousReleaseId = lastActiveRelease == null ? 0 : lastActiveRelease.getId();
    Release release = createRelease(namespace, releaseName, releaseComment,
                                    configurations, operator);

    releaseHistoryService.createReleaseHistory(namespace.getAppId(), namespace.getClusterName(),
                                               namespace.getNamespaceName(), namespace.getClusterName(),
                                               release.getId(), previousReleaseId, releaseOperation,
                                               operationContext, operator);

    return release;
  }

看看库里,配置已经写进去了

MariaDB [ApolloConfigTestDB]> select * from `Release`;
+----+---------------------------------+------------------------+---------+---------------------+-------------+---------------+--------------------------------------+-------------+-----------+----------------------+------------------------+---------------------------+---------------------+
| Id | ReleaseKey                      | Name                   | Comment | AppId               | ClusterName | NamespaceName | Configurations                       | IsAbandoned | IsDeleted | DataChange_CreatedBy | DataChange_CreatedTime | DataChange_LastModifiedBy | DataChange_LastTime |
+----+---------------------------------+------------------------+---------+---------------------+-------------+---------------+--------------------------------------+-------------+-----------+----------------------+------------------------+---------------------------+---------------------+
|  1 | 20220414194511-f8c63e3dcbc16acd | 20220414194506-release |         | dubbo-demo-service2 | default     | application   | {"dubbo.registry":"zk://zk1.od.com"} |             |           | apollo               | 2022-04-14 19:45:11    | apollo                    | 2022-04-14 19:45:11 |
+----+---------------------------------+------------------------+---------+---------------------+-------------+---------------+--------------------------------------+-------------+-----------+----------------------+------------------------+---------------------------+---------------------+
1 row in set (0.000 sec)

MariaDB [ApolloConfigTestDB]> 

4.发布事件publisher.publishEvent