nacos address中postCluster的原理及作用是什么

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序

本文主要研究一下nacos address的postCluster

AddressServerClusterController

nacos-1.1.3/address/src/main/java/com/alibaba/nacos/address/controller/AddressServerClusterController.java

@RestController
@RequestMapping({AddressServerConstants.ADDRESS_SERVER_REQUEST_URL + "/nodes"})
public class AddressServerClusterController {

    @Autowired
    private ServiceManager serviceManager;

    @Autowired
    private AddressServerManager addressServerManager;

    @Autowired
    private AddressServerGeneratorManager addressServerGeneratorManager;

    /**
     * @param product Ip list of products to be associated
     * @param cluster Ip list of product cluster to be associated
     * @param ips     will post ip list.
     * @return
     */
    @RequestMapping(value = "", method = RequestMethod.POST)
    public ResponseEntity postCluster(@RequestParam(required = false) String product,
                                      @RequestParam(required = false) String cluster,
                                      @RequestParam(name = "ips") String ips) {

        //1. prepare the storage name for product and cluster
        String productName = addressServerGeneratorManager.generateProductName(product);
        String clusterName = addressServerManager.getDefaultClusterNameIfEmpty(cluster);

        //2. prepare the response name for product and cluster to client
        String rawProductName = addressServerManager.getRawProductName(product);
        String rawClusterName = addressServerManager.getRawClusterName(cluster);
        Loggers.addressLogger.info("put cluster node,the cluster name is " + cluster + "; the product name=" + product + "; the ip list=" + ips);
        ResponseEntity responseEntity;
        try {
            String serviceName = addressServerGeneratorManager.generateNacosServiceName(productName);

            Cluster clusterObj = new Cluster();
            clusterObj.setName(clusterName);
            clusterObj.setHealthChecker(new AbstractHealthChecker.None());
            serviceManager.createServiceIfAbsent(Constants.DEFAULT_NAMESPACE_ID, serviceName, false, clusterObj);
            String[] ipArray = addressServerManager.splitIps(ips);
            String checkResult = AddressServerParamCheckUtil.checkIps(ipArray);
            if (AddressServerParamCheckUtil.CHECK_OK.equals(checkResult)) {
                List<Instance> instanceList = addressServerGeneratorManager.generateInstancesByIps(serviceName, rawProductName, clusterName, ipArray);
                for (Instance instance : instanceList) {
                    serviceManager.registerInstance(Constants.DEFAULT_NAMESPACE_ID, serviceName, instance);
                }
                responseEntity = ResponseEntity.ok("product=" + rawProductName + ",cluster=" + rawClusterName + "; put success with size=" + instanceList.size());
            } else {
                responseEntity = ResponseEntity.status(HttpStatus.BAD_REQUEST).body(checkResult);
            }
        } catch (Exception e) {
            responseEntity = ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(e.getMessage());
        }

        return responseEntity;
    }

    //......
}

• postCluster方法接收product、cluster、ips參數；其中productName通過addressServerGeneratorManager.generateProductName(product)生成；clusterName通過addressServerManager.getDefaultClusterNameIfEmpty(cluster)生成

• 之后通過通過addressServerGeneratorManager.generateNacosServiceName(productName)生成serviceName，然后通過serviceManager.createServiceIfAbsent創建service

• 之后校驗下ip地址，校驗通過的話，會通過addressServerGeneratorManager.generateInstancesByIps(serviceName, rawProductName, clusterName, ipArray)生成instanceList，然后遍歷instanceList執行naming模塊中的serviceManager的registerInstance方法

AddressServerGeneratorManager

nacos-1.1.3/address/src/main/java/com/alibaba/nacos/address/component/AddressServerGeneratorManager.java

@Component
public class AddressServerGeneratorManager {

    public String generateProductName(String name) {

        if (StringUtils.isBlank(name) || AddressServerConstants.DEFAULT_PRODUCT.equals(name)) {

            return AddressServerConstants.ALIWARE_NACOS_DEFAULT_PRODUCT_NAME;
        }

        return String.format(AddressServerConstants.ALIWARE_NACOS_PRODUCT_DOM_TEMPLATE, name);
    }

    /**
     * @param rawServiceName the raw service name will not contains the {@Constans.DEFAULT_GROUP}
     * @return the nacos service name
     */
    public String generateNacosServiceName(String rawServiceName) {

        if (rawServiceName.indexOf(Constants.DEFAULT_GROUP) != -1) {
            return rawServiceName;
        }

        return Constants.DEFAULT_GROUP + AddressServerConstants.GROUP_SERVICE_NAME_SEP + rawServiceName;
    }

    public List<Instance> generateInstancesByIps(String serviceName, String rawProductName, String clusterName, String[] ipArray) {
        if (StringUtils.isEmpty(serviceName)
            || StringUtils.isEmpty(clusterName)
            || ipArray == null || ipArray.length == 0) {
            return Collections.emptyList();
        }

        List<Instance> instanceList = new ArrayList<>(ipArray.length);
        for (String ip : ipArray) {
            String[] ipAndPort = generateIpAndPort(ip);
            Instance instance = new Instance();
            instance.setIp(ipAndPort[0]);
            instance.setPort(Integer.valueOf(ipAndPort[1]));
            instance.setClusterName(clusterName);
            instance.setServiceName(serviceName);
            instance.setTenant(Constants.DEFAULT_NAMESPACE_ID);
            instance.setApp(rawProductName);
            instance.setEphemeral(false);
            instanceList.add(instance);
        }

        return instanceList;
    }

    //......
}

• AddressServerGeneratorManager的generateProductName方法對于name為空或者是nacos的，返回nacos.as.default，否則返回nacos.as.前綴加name

• generateNacosServiceName會返回DEFAULT_GROUP@@加rawServiceName，默認rawServiceName是不包含DEFAULT_GROUP的

• generateInstancesByIps方法遍歷ipArray，挨個創建instance，注意這里設置了ephemeral為false

AddressServerManager

nacos-1.1.3/address/src/main/java/com/alibaba/nacos/address/component/AddressServerManager.java

@Component
public class AddressServerManager {

    public String getRawProductName(String name) {

        if (StringUtils.isBlank(name) || AddressServerConstants.DEFAULT_PRODUCT.equals(name)) {

            return AddressServerConstants.DEFAULT_PRODUCT;
        }

        return name;
    }

    public String getRawClusterName(String name) {

        return getDefaultClusterNameIfEmpty(name);
    }

    public String getDefaultClusterNameIfEmpty(String name) {

        if (StringUtils.isEmpty(name) || AddressServerConstants.DEFAULT_GET_CLUSTER.equals(name)) {
            return AddressServerConstants.DEFAULT_GET_CLUSTER;
        }

        return name;
    }

    public String[] splitIps(String ips) {

        if (StringUtils.isBlank(ips)) {

            return new String[0];
        }

        return ips.split(AddressServerConstants.MULTI_IPS_SEPARATOR);
    }
       
    //......
}

• getRawProductName方法對于name為空或者是name已經是nacos的返回nacos，否則返回原值；getRawClusterName內部調用的是getDefaultClusterNameIfEmpty方法，它對于name是空或者name已經是serverlist的返回serverlist，否則返回原值；splitIps方法根據AddressServerConstants.MULTI_IPS_SEPARATOR來分割字符串為數組

小結

• postCluster方法接收product、cluster、ips參數；其中productName通過addressServerGeneratorManager.generateProductName(product)生成；clusterName通過addressServerManager.getDefaultClusterNameIfEmpty(cluster)生成

• 之后通過通過addressServerGeneratorManager.generateNacosServiceName(productName)生成serviceName，然后通過serviceManager.createServiceIfAbsent創建service

• 之后校驗下ip地址，校驗通過的話，會通過addressServerGeneratorManager.generateInstancesByIps(serviceName, rawProductName, clusterName, ipArray)生成instanceList，然后遍歷instanceList執行naming模塊中的serviceManager的registerInstance方法

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