I am developing an application with microservice-based arhitecture using Spring Cloud.
I have four applications currently in project:
config-server, eureka-server, gateway-service(zuul) and eureka-client which I am using just to test that the project works as intended.
But I have a problem fetching properties from the config-server.
I have a git repository in which I have one file, eureka-client.yml.
This file has one property message: test message.
I can see that the property is loaded into the config-server if I go to http://localhost:8888/eureka-client/default.
But when I access the property in my eureka-client it returns null.
environment.getProperty("message");
Could someone tell me what am I doing wrong? I'm probably just missing a configuration or .yml property but can't find out which one.
Also the clients are supposed to fetch the properties from the config-server through Eureka.
EDIT:
eureka-server - application.yml
server:
port: 8761
eureka:
instance:
hostname: localhost
client:
register-with-eureka: false
fetch-registry: false
service-url:
default-zone: http://${eureka.instance.hostname}:${server.port}/eureka/
eureka-client - application.yml
server:
port: 8082
And annotated with #EnableDiscoveryClient
config-server - application.yml
server:
port: 8888
spring:
cloud:
config:
server:
git:
uri: https://github.com/bpuscasu/config-server
And annotated with #EnableConfigServer and #EnableDiscoveryClient
Related
I am using turbine to aggregate data from hystrix. Everything goes well when I try to get data with hystrix(localhost:23002/hystrix.strean). However,when I try to use turbine to get data, it shows nothing.
Here's my configuration.
server:
port: 23002
spring:
application:
name: hystrix-1
eureka:
client:
serviceUrl:
defaultZone: http://t2.dcfservice.com:23001/eureka/
instance:
hostname: localhost
metadataMap:
cluster : MAIN
spring:
application.name: microservice-hystrix-turbine
server:
port: 23111
security.basic.enabled: false
turbine:
aggregator:
clusterConfig: MAIN
appConfig: hystrix-1
clusterNameExpression: metadata['cluster']
eureka:
client:
serviceUrl:
defaultZone: http://t2.dcfservice.com:23001/eureka/
I can get data with URL:localhost:23002/hystrix.stream
My goal is to get data with URL localhost:23111/turbine.stream?cluster=MAIN
If you posted your yml with exact indentation that is being used in your server, the indentation of below are wrong.
turbine:
aggregator:
clusterConfig: MAIN
appConfig: hystrix-1
clusterNameExpression: metadata['cluster']
appConfig and clusterNameExpression must be a child of turbine, not aggregator
I spent all day trying to make Zuul + Eureka work together, but I hasn't been lucky with that. Zuul alone, without Eureka, works fine. I've tried a lot of different configurations like this one, which says that all I have to do is turn Zull in an Eureka client (by using #EnableDiscoveryClient at root application class).
My setup is very simple: it consists of a service:8080 (service 1), Zuul:9000 and Eureka:8761.
All the approaches I've tried using Eureka gave me the same error when I tried to access service 1 using Zull (http://localhost:9000/service1 in this case):
com.netflix.zuul.exception.ZuulException: Forwarding error
(...)
com.netflix.client.ClientException: Load balancer does not have available server for client: service1
Service 1 is working fine (I can access it directly from the browser address bar http://localhost:8080) and Eureka shows both Zull and Service 1 correctly registered:
The apps are configured like:
Service 1 (bootstrap.yml):
spring:
application:
name: service1
Service 1 (application.yml):
eureka:
instance:
leaseRenewalIntervalInSeconds: 1
leaseExpirationDurationInSeconds: 2
client:
serviceUrl:
defaultZone: http://127.0.0.1:8761/eureka/
Zuul:
ribbon:
eureka:
enabled: false
eureka:
instance:
leaseRenewalIntervalInSeconds: 1
leaseExpirationDurationInSeconds: 2
client:
serviceUrl:
defaultZone: http://127.0.0.1:8761/eureka/
healthcheck:
enabled: true
server:
port: 9000
Eureka:
server:
port: 8761
eureka:
client:
register-with-eureka: false
fetch-registry: false
logging:
level:
com:
netflix:
eureka: OFF
discovery: OFF
Zuul Annotations at root application class:
#EnableZuulProxy
#EnableDiscoveryClient
Am I missing any important point?
*****Config Server- Application Service Setup*****
Below is the configuration from application.yml
server:
port: 8882
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
spring:
cloud:
config:
server:
git:uri: https://github.com/appleman/config
Below is the configuration from boostrap.yml
spring:
application:
name: configserver
Starting of this plain spring boot application registers config-server to Eureka.
**General Eureka Server is running on 8761 port
********Below is the Application Client configuration*****
Below is the Application Client configuration in my bootstrap.yml
spring:
application:
name: contractService,envDEV13
cloud:
config:
enabled: true
discovery:
enabled: true
serviceId: configserver
eureka:
instance:
nonSecurePort: ${server.port:8080}
client:
serviceUrl:
defaultZone: http://${eureka.host:localhost}:${eureka.port:8761}/eureka/
Injection of properties in Spring Controller like the below snippet is not working.
#Value("${creditService.eppDbUrl}")
String bar;
Please suggest us if we are doing anything wrong.
I am now trying to set up using spring config server / spring config client and eureka server to do service discovery together. when I was using local file system to save configuration, everything is fine, but as soon as I change to gitHub to save configuration, I can not start spring config client, and I got this error message:
com.netflix.discovery.DiscoveryClient : Can't get a response from http://user:{cipher}AQBdTe9vjgOqANyfi+Ke5HYmhFJnuvsGJ+8FOqLgdMdFInJkVRzy9XngylNp9KlX2lwPI13jT7ceDjBs9w4B6A15akQTHHP1q9rWwMcLtVCCKGFgvXSgQF+WWIItxBmIDGG4bSgDYZ6XQWl66T84PxjTBygErpmAjn+X2BWdtWtVmjXzpMQMaHGpiyLPoGIQYF4j9ZGpl16Jx79+j6et6LStksrT3WxQuanhZwIkqZ827+2mlUB3kd5ocW7R0vC3JMGVZlGNfqYQwJIhSJ19lrq4gxm/zbGroYonW3QSHTiRlhlvOdovEua/0dCl6+s0iEHYZCBllr7jikEWmS5Px7U2TG8/eQkjR8pUbSN6OE+OI2ZZUCNOT+mi75ZeeN1OtdQ=#localhost:8761/eureka/null
Can't contact any eureka nodes - possibly a security group issue?
java.lang.IllegalArgumentException: Illegal character in authority at index 7: http://user:{cipher}AQBdTe9vjgOqANyfi+Ke5HYmhFJnuvsGJ+8FOqLgdMdFInJkVRzy9XngylNp9KlX2lwPI13jT7ceDjBs9w4B6A15akQTHHP1q9rWwMcLtVCCKGFgvXSgQF+WWIItxBmIDGG4bSgDYZ6XQWl66T84PxjTBygErpmAjn+X2BWdtWtVmjXzpMQMaHGpiyLPoGIQYF4j9ZGpl16Jx79+j6et6LStksrT3WxQuanhZwIkqZ827+2mlUB3kd5ocW7R0vC3JMGVZlGNfqYQwJIhSJ19lrq4gxm/zbGroYonW3QSHTiRlhlvOdovEua/0dCl6+s0iEHYZCBllr7jikEWmS5Px7U2TG8/eQkjR8pUbSN6OE+OI2ZZUCNOT+mi75ZeeN1OtdQ=#localhost:8761/eureka/
at java.net.URI.create(URI.java:852)
This is what I have:
In cofig server application.yml:
spring:
application:
name: spirent-config-server
cloud:
config:
server:
git:
uri: https://github.com/spring-cloud-samples/config-repo
#searchPaths: foo,bar*
server:
port: 8888
in config client:
bootstrap.properties:
spring.application.name= foo
spring.profiles.active= development
spring.cloud.config.uri= http://localhost:8888
and application.yml
eureka:
instance:
hostname: ${host.instance.name:frank1}
nonSecurePort: ${host.instance.port:8080}
metadataMap:
instanceId: ${host.instance.instanceid:frank_123}
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
server:
port: ${host.instance.port:8080}
Eureka Server:
application.yml
server:
port: 8761
eureka:
client:
registerWithEureka: false
fetchRegistry: false
server:
waitTimeInMsWhenSyncEmpty: 0
bootstrap.yml:
spring:
application:
name: eureka
cloud:
config:
uri: ${CONFIG_SERVER_URL:http://localhost:8888}
From the exception, it seemed it is because discoverClient is not working, anything special for the configuration?
But if I change from gitHub to local file storage for configuration, everything is fine.
Thanks for your suggestion in advance.
Based on the spring cloud document, I am doing like this:
In application.yml of config server:
spring:
application:
name: spirent-config-server
cloud:
config:
server:
git:
uri: https://github.com/spring-cloud-samples/config-repo
#searchPaths: foo,bar*
encrypt:
key: abc
server:
port: 8888
In application.yml of Eureka Server:
server:
port: 8761
eureka:
instance:
hostname: localhost
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
server:
waitTimeInMsWhenSyncEmpty: 0
encrypt:
key: abc
And in application.yml of config client:
eureka:
instance:
hostname: ${host.instance.name:frank1}
nonSecurePort: ${host.instance.port:8080}
leaseRenewalIntervalInSeconds: 5 #default is 30, recommended to keep default
metadataMap:
#instanceId: ${host.instance.instanceid:frank_123}
instanceId: ${spring.application.name}:${spring.application.instance_id:${random.value}}
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
server:
port: ${host.instance.port:8080}
encrypt:
key: abc
But, the problem is after I started Eureka an config server, it is fine, no exception, but after I started config client, I got this same exception:
Can't contact any eureka nodes - possibly a security group issue?
java.lang.IllegalArgumentException: Illegal character in authority at index 7: http://user:{cipher}AQBdTe9vjgOqANyfi+Ke5HYmhFJnuvsGJ+8FOqLgdMdFInJkVRzy9XngylNp9KlX2lwPI13jT7ceDjBs9w4B6A15akQTHHP1q9rWwMcLtVCCKGFgvXSgQF+WWIItxBmIDGG4bSgDYZ6XQWl66T84PxjTBygErpmAjn+X2BWdtWtVmjXzpMQMaHGpiyLPoGIQYF4j9ZGpl16Jx79+j6et6LStksrT3WxQuanhZwIkqZ827+2mlUB3kd5ocW7R0vC3JMGVZlGNfqYQwJIhSJ19lrq4gxm/zbGroYonW3QSHTiRlhlvOdovEua/0dCl6+s0iEHYZCBllr7jikEWmS5Px7U2TG8/eQkjR8pUbSN6OE+OI2ZZUCNOT+mi75ZeeN1OtdQ=#localhost:8761/eureka/
at java.net.URI.create(URI.java:852)
at com.sun.jersey.api.client.Client.resource(Client.java:433)
at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1091)
at com.netflix.discovery.DiscoveryClient.makeRemoteCall(DiscoveryClient.java:1060)
at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:835)
Can anyone tell me where is my error? This only happened in using GIT as config server data source, but in local file data source, no error happened.
Thanks
These are my steps to try to resolve the key issues, but failed again:
download the "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files" from Oracle, and follow instructions for installation (essentially replace the 2 policy files in the JRE lib/security directory with the ones that you downloaded).
Now if I run spring encrypt mysecret --key foo, it is successful, this means the JCE is installed correctly;
Creating a Key Store for Testing: using this:
https://github.com/spring-cloud/spring-cloud-config/blob/master/docs/src/main/asciidoc/spring-cloud-config.adoc#creating-a-key-store-for-testing
after updating the application.yml in my config server, the application.yml is this:
spring:
application:
name: spirent-config-server
cloud:
config:
server:
git:
uri: https://github.com/spring-cloud-samples/config-repo
#searchPaths: foo,bar*
encrypt:
keyStore:
location: classpath:/server.jks
password: letmein
alias: abc
secret: changeme
key: abc
server:
port: 8888
adding this to both eureka server and config client application.yml:
encrypt:
key: abc
Run everything:
Result is same nasty error
So what is wrong is my testing? Thanks for your help
It is my fault:
Changing application.yml to this:
spring:
application:
name: configserver
encrypt:
failOnError: false
keyStore:
#location: classpath:keystore.jks
#password: ${KEYSTORE_PASSWORD:foobar} # don't use a default in production
#alias: test
location: classpath:server.jks
password: letmein
alias: mytestkey
secret: changeme
And then using this command to generate the file resolving the issue completely:
keytool -genkeypair -alias mytestkey -keyalg RSA \
-dname "CN=Web Server,OU=Unit,O=Organization,L=City,S=State,C=US" \
-keypass changeme -keystore server.jks -storepass letmein
Thanks
I'm prototyping a set of Spring Cloud + Netflix OSS applications and have run into trouble with Eureka. In our setup, we have a Spring Cloud Config Server + Eureka Server, and then 2 modules that utilize that server component for bootstrapping and service discovery.
The problem I run into is that if I spin up 2 instances of the Eureka Server and try to pair them (based on the Two Peer Aware Eureka Servers in the docs) they don't synchronize with each other. See configs below and/or the code on GitHub.
Essentially, Peer1 starts up and looks fine. Peer2 will startup and look fine, with both peers showing each other in the services. However, if the "UserService" module spins up and registers itself with Peer1, Peer2 will never see it. If we then spin up the "Web" module pointing to Peer2, it can never resolve the UserService. They basically act in isolation.
I've tried several combinations of setting the serviceUrl both on the server and the instance of the Eureka servers but to no avail. Am I just configuring things wrong?
Peer 1 / default config:
server:
port: 8888
eureka:
dashboard:
path: /dashboard
instance:
hostname: peer1
leaseRenewalIntervalInSeconds: 3
client:
serviceUrl:
defaultZone: ${eureka.server.serviceUrl:http://localhost:${server.port}/eureka/}
server:
serviceUrl:
defaultZone: http://localhost:${server.port}/eureka/
peer2: http://peer2/eureka/
waitTimeInMsWhenSyncEmpty: 0
spring:
application:
name: demo-config-service
profiles:
active: native
# required for Spring Cloud Bus
rabbitmq:
host: ${DOCKER_IP:192.168.59.103}
port: 5672
username: guest
password: guest
virtualHost: /
cloud:
config:
server:
prefix: /configs
native:
searchLocations: /Users/dave/workspace/oss/distributed-spring/modules/config-server/src/main/resources/testConfigs
# git :
# uri: https://github.com/joshlong/microservices-lab-configuration
Peer 2 config:
server:
port: 8889
eureka:
dashboard:
path: /dashboard
instance:
hostname: peer2
leaseRenewalIntervalInSeconds: 3
client:
serviceUrl:
defaultZone: ${eureka.server.serviceUrl:http://localhost:${server.port}/eureka/}
server:
serviceUrl:
defaultZone: http://localhost:8888/eureka/
peer1: http://peer1/eureka/
waitTimeInMsWhenSyncEmpty: 0
spring:
application:
name: demo-config-service
profiles:
active: native
# required for Spring Cloud Bus
rabbitmq:
host: ${DOCKER_IP:192.168.59.103}
port: 5672
username: guest
password: guest
virtualHost: /
cloud:
config:
server:
prefix: /configs
native:
searchLocations: /Users/dave/workspace/oss/distributed-spring/modules/config-server/src/main/resources/testConfigs
# git :
# uri: https://github.com/joshlong/microservices-lab-configuration
There were a few problems. The defaultZone needs to be in the client section as noted in the docs. The defaultZone url needs the port.
/etc/hosts
127.0.0.1 peer1
127.0.0.1 peer2
Peer 1 Config (Partial)
eureka:
instance:
hostname: peer1
leaseRenewalIntervalInSeconds: 3
client:
serviceUrl:
defaultZone: http://peer2:8889/eureka/
Peer 2 Config (Partial)
eureka:
dashboard:
path: /dashboard
instance:
hostname: peer2
leaseRenewalIntervalInSeconds: 3
client:
serviceUrl:
defaultZone: http://peer1:8888/eureka/
server:
waitTimeInMsWhenSyncEmpty: 0
User service config (Partial) Config port was wrong.
spring:
application:
name: user-service
cloud:
config:
uri: http://localhost:8888/configs
You can see user-service replicated to both peer1 and peer2. I can post a PR to your code if you want.
Peer 1
Peer 2
#spencergibb's didn't mention why this hack-ish workaround is required. There is a gotcha with running more than one Eureka server on the same host. Netflix code (com.netflix.eureka.cluster.PeerEurekaNodes.isThisMyUrl) filters out the peer URLs that are on the same host. This may have been done to prevent the server registering as its own peer (I’m guessing here) but because they don’t check for the port, peer awareness doesn’t work unless the Eureka hostnames in the eureka.client.serviceUrl.defaultZone are different. The hacky workaround for this is to define unique hostnames and then map them to 127.0.0.1 in the /etc/hosts file (or its Windows equivalent).
I've created a blog post with the details of Eureka here, that fills in some missing detail from Spring doc or Netflix blog. It is the result of several days of debugging and digging through source code.