/*
* Copyright 2013-2014 the original author or authors.
*
* Licensed 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.springframework.cloud.netflix.eureka;
import java.util.HashMap;
import java.util.Map;
import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.cloud.commons.util.InetUtils;
import org.springframework.cloud.commons.util.InetUtils.HostInfo;
import org.springframework.context.EnvironmentAware;
import org.springframework.core.env.Environment;
import org.springframework.util.StringUtils;
import com.netflix.appinfo.DataCenterInfo;
import com.netflix.appinfo.InstanceInfo.InstanceStatus;
import com.netflix.appinfo.MyDataCenterInfo;
import lombok.AccessLevel;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
/**
* @author Dave Syer
* @author Spencer Gibb
* @author Ryan Baxter
*/
@Data
@ConfigurationProperties("eureka.instance")
public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig, EnvironmentAware {
private static final String UNKNOWN = "unknown";
@Getter(AccessLevel.PRIVATE)
@Setter(AccessLevel.PRIVATE)
private HostInfo hostInfo;
@Getter(AccessLevel.PRIVATE)
@Setter(AccessLevel.PRIVATE)
private InetUtils inetUtils;
/**
* Get the name of the application to be registered with eureka.
*/
private String appname = UNKNOWN;
/**
* Get the name of the application group to be registered with eureka.
*/
private String appGroupName;
/**
* Indicates whether the instance should be enabled for taking traffic as soon as it
* is registered with eureka. Sometimes the application might need to do some
* pre-processing before it is ready to take traffic.
*/
private boolean instanceEnabledOnit;
/**
* Get the non-secure port on which the instance should receive traffic.
*/
private int nonSecurePort = 80;
/**
* Get the Secure port on which the instance should receive traffic.
*/
private int securePort = 443;
/**
* Indicates whether the non-secure port should be enabled for traffic or not.
*/
private boolean nonSecurePortEnabled = true;
/**
* Indicates whether the secure port should be enabled for traffic or not.
*/
private boolean securePortEnabled;
/**
* Indicates how often (in seconds) the eureka client needs to send heartbeats to
* eureka server to indicate that it is still alive. If the heartbeats are not
* received for the period specified in leaseExpirationDurationInSeconds, eureka
* server will remove the instance from its view, there by disallowing traffic to this
* instance.
*
* Note that the instance could still not take traffic if it implements
* HealthCheckCallback and then decides to make itself unavailable.
*/
private int leaseRenewalIntervalInSeconds = 30;
/**
* Indicates the time in seconds that the eureka server waits since it received the
* last heartbeat before it can remove this instance from its view and there by
* disallowing traffic to this instance.
*
* Setting this value too long could mean that the traffic could be routed to the
* instance even though the instance is not alive. Setting this value too small could
* mean, the instance may be taken out of traffic because of temporary network
* glitches.This value to be set to atleast higher than the value specified in
* leaseRenewalIntervalInSeconds.
*/
private int leaseExpirationDurationInSeconds = 90;
/**
* Gets the virtual host name defined for this instance.
*
* This is typically the way other instance would find this instance by using the
* virtual host name.Think of this as similar to the fully qualified domain name, that
* the users of your services will need to find this instance.
*/
private String virtualHostName = UNKNOWN;
/**
* Get the unique Id (within the scope of the appName) of this instance to be
* registered with eureka.
*/
private String instanceId;
/**
* Gets the secure virtual host name defined for this instance.
*
* This is typically the way other instance would find this instance by using the
* secure virtual host name.Think of this as similar to the fully qualified domain
* name, that the users of your services will need to find this instance.
*/
private String secureVirtualHostName = UNKNOWN;
/**
* Gets the AWS autoscaling group name associated with this instance. This information
* is specifically used in an AWS environment to automatically put an instance out of
* service after the instance is launched and it has been disabled for traffic..
*/
private String aSGName;
/**
* Gets the metadata name/value pairs associated with this instance. This information
* is sent to eureka server and can be used by other instances.
*/
private Map<String, String> metadataMap = new HashMap<>();
/**
* Returns the data center this instance is deployed. This information is used to get
* some AWS specific instance information if the instance is deployed in AWS.
*/
private DataCenterInfo dataCenterInfo = new MyDataCenterInfo(
DataCenterInfo.Name.MyOwn);
/**
* Get the IPAdress of the instance. This information is for academic purposes only as
* the communication from other instances primarily happen using the information
* supplied in {@link #getHostName(boolean)}.
*/
private String ipAddress;
/**
* Gets the relative status page URL path for this instance. The status page URL is
* then constructed out of the hostName and the type of communication - secure or
* unsecure as specified in securePort and nonSecurePort.
*
* It is normally used for informational purposes for other services to find about the
* status of this instance. Users can provide a simple HTML indicating what is the
* current status of the instance.
*/
private String statusPageUrlPath = "/info";
/**
* Gets the absolute status page URL path for this instance. The users can provide the
* statusPageUrlPath if the status page resides in the same instance talking to
* eureka, else in the cases where the instance is a proxy for some other server,
* users can provide the full URL. If the full URL is provided it takes precedence.
*
* It is normally used for informational purposes for other services to find about the
* status of this instance. Users can provide a simple HTML indicating what is the
* current status of the instance.
*/
private String statusPageUrl;
/**
* Gets the relative home page URL Path for this instance. The home page URL is then
* constructed out of the hostName and the type of communication - secure or unsecure.
*
* It is normally used for informational purposes for other services to use it as a
* landing page.
*/
private String homePageUrlPath = "/";
/**
* Gets the absolute home page URL for this instance. The users can provide the
* homePageUrlPath if the home page resides in the same instance talking to eureka,
* else in the cases where the instance is a proxy for some other server, users can
* provide the full URL. If the full URL is provided it takes precedence.
*
* It is normally used for informational purposes for other services to use it as a
* landing page. The full URL should follow the format http://${eureka.hostname}:7001/
* where the value ${eureka.hostname} is replaced at runtime.
*/
private String homePageUrl;
/**
* Gets the relative health check URL path for this instance. The health check page
* URL is then constructed out of the hostname and the type of communication - secure
* or unsecure as specified in securePort and nonSecurePort.
*
* It is normally used for making educated decisions based on the health of the
* instance - for example, it can be used to determine whether to proceed deployments
* to an entire farm or stop the deployments without causing further damage.
*/
private String healthCheckUrlPath = "/health";
/**
* Gets the absolute health check page URL for this instance. The users can provide
* the healthCheckUrlPath if the health check page resides in the same instance
* talking to eureka, else in the cases where the instance is a proxy for some other
* server, users can provide the full URL. If the full URL is provided it takes
* precedence.
*
* <p>
* It is normally used for making educated decisions based on the health of the
* instance - for example, it can be used to determine whether to proceed deployments
* to an entire farm or stop the deployments without causing further damage. The full
* URL should follow the format http://${eureka.hostname}:7001/ where the value
* ${eureka.hostname} is replaced at runtime.
*/
private String healthCheckUrl;
/**
* Gets the absolute secure health check page URL for this instance. The users can
* provide the secureHealthCheckUrl if the health check page resides in the same
* instance talking to eureka, else in the cases where the instance is a proxy for
* some other server, users can provide the full URL. If the full URL is provided it
* takes precedence.
*
* <p>
* It is normally used for making educated decisions based on the health of the
* instance - for example, it can be used to determine whether to proceed deployments
* to an entire farm or stop the deployments without causing further damage. The full
* URL should follow the format http://${eureka.hostname}:7001/ where the value
* ${eureka.hostname} is replaced at runtime.
*/
private String secureHealthCheckUrl;
/**
* Get the namespace used to find properties. Ignored in Spring Cloud.
*/
private String namespace = "eureka";
/**
* The hostname if it can be determined at configuration time (otherwise it will be
* guessed from OS primitives).
*/
private String hostname;
/**
* Flag to say that, when guessing a hostname, the IP address of the server should be
* used in prference to the hostname reported by the OS.
*/
private boolean preferIpAddress = false;
/**
* Initial status to register with rmeote Eureka server.
*/
private InstanceStatus initialStatus = InstanceStatus.UP;
private String[] defaultAddressResolutionOrder = new String[0];
private Environment environment;
public String getHostname() {
return getHostName(false);
}
@SuppressWarnings("unused")
private EurekaInstanceConfigBean() {
}
public EurekaInstanceConfigBean(InetUtils inetUtils) {
this.inetUtils = inetUtils;
this.hostInfo = this.inetUtils.findFirstNonLoopbackHostInfo();
this.ipAddress = this.hostInfo.getIpAddress();
this.hostname = this.hostInfo.getHostname();
}
@Override
public String getInstanceId() {
if (this.instanceId == null && this.metadataMap != null) {
return this.metadataMap.get("instanceId");
}
return this.instanceId;
}
@Override
public boolean getSecurePortEnabled() {
return this.securePortEnabled;
}
public void setHostname(String hostname) {
this.hostname = hostname;
this.hostInfo.override = true;
}
public void setIpAddress(String ipAddress) {
this.ipAddress = ipAddress;
this.hostInfo.override = true;
}
@Override
public String getHostName(boolean refresh) {
if (refresh && !this.hostInfo.override) {
this.ipAddress = this.hostInfo.getIpAddress();
this.hostname = this.hostInfo.getHostname();
}
return this.preferIpAddress ? this.ipAddress : this.hostname;
}
@Override
public void setEnvironment(Environment environment) {
this.environment = environment;
// set some defaults from the environment, but allow the defaults to use relaxed binding
RelaxedPropertyResolver springPropertyResolver = new RelaxedPropertyResolver(this.environment, "spring.application.");
String springAppName = springPropertyResolver.getProperty("name");
if(StringUtils.hasText(springAppName)) {
setAppname(springAppName);
setVirtualHostName(springAppName);
setSecureVirtualHostName(springAppName);
}
}
}