Currently I am running Spring Boot Services with Discovery First.
Starting the services one after another works just fine, but I am having issues starting the services all at once via docker-compose.
The discovery first bootstrap seems to not work as I expected. I would assume that the service would halt / retry till he receives the configuration from the configuration service, which has been discovered via eureka. But currently it will try to resolve the configuration once and then the service will start immediately after - no matter if a configuration has been brought or not.
The service bootstrap looks as following:
spring:
application:
name: my-service
cloud:
config:
fail-fast: false
discovery:
enabled: true
service-id: configserver
retry:
initialInterval: 2000
multiplier: 1.5
maxInterval: 60000
maxAttempts: 10
server:
port: ${APPLICATION_PORT:16000}
eureka:
client:
serviceUrl:
defaultZone: http://${EUREKA_HOSTNAME:localhost}:15000/eureka/
The eureka config looks as following:
spring:
application:
name: manager
server:
port: 15000
eureka:
client:
registerWithEureka: true
fetchRegistry: false
serviceUrl:
defaultZone: http://${EUREKA_HOSTNAME:localhost}:15000/eureka/
Last but not least - the configserver config looks as following:
spring:
application:
name: configserver
cloud:
config:
fail-fast: true
server:
port: 15001
eureka:
client:
serviceUrl:
defaultZone: http://${EUREKA_HOSTNAME:localhost}:15000/eureka/
Anyone able to give any advice here?
I found the issue:
Actually I found two issues on our side. The first one is not having a suitable lease renewal interval. The client just retried receiving the configuration with the cached services.
Since the cached services did not contain a configuration service, he wasn't able to receive a proper configuration.
The second problem was to not wait for enough time. This has been fixed in raising the maxAttempts higher. So the config and discovery services do have enough time to come up.
The client Configuration looks like the following now:
spring:
application:
name: service
cloud:
config:
fail-fast: true
discovery:
enabled: true
service-id: CONFIGSERVER
retry:
initialInterval: 2000
multiplier: 1.5
maxInterval: 60000
maxAttempts: 100
server:
port: ${APPLICATION_PORT:16000}
eureka:
instance:
lease-renewal-interval-in-seconds: 10
client:
fetch-registry: true
serviceUrl:
defaultZone: http://${EUREKA_HOSTNAME:localhost}:15000/eureka/
Related
I have the following setup:
eureka server
api gateway
auth service
Api gateway yml:
server:
port: 8081
spring:
application:
name: api-gateway
zipkin:
base-url: http://localhost:9411
cloud:
gateway:
discovery:
locator:
enabled: true
lower-case-service-id: true
routes:
- id: auth
uri: lb://auth
predicates:
- Path=/api/user/**
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka
fetch-registry: true
register-with-eureka: true
instance:
prefer-ip-address: true
hostname: localhost
Auth service yml:
server:
port: 8080
spring:
application:
name: auth
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka
fetch-registry: true
register-with-eureka: true
instance:
prefer-ip-address: true
hostname: localhost
On the eureka web dashboard both services are showing correctly. Now, I want to test the auth service with the endpoint /api/user/signup.
If I fire a post request like this:
http://localhost:8081/auth/api/user/signup
or like this:
http://localhost:8081/api/user/signup
Before adding
instance:
prefer-ip-address: true
hostname: localhost
I got an unknown host exception, how I get this:
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection timed out: no further information: /192.168.0.104:8080
I'm currently at home, but router and wifi works. But indeed, if I copy in the browser the 192.168.0.104, then I get connection timeout.
I'm developing this app on a company laptop (which has it's own domain), and which I use at home on my own network. Maybe this can be relevant. Basically I just want to use localhost. But how?
I have a total of 2 Eureka servers. In the dashboard, the other one is also shown to me as an available replica. The registered services are also visible in both Eureka servers and are updated accordingly.
If one Eureka server crashes/goes down, the registration/deregistration of the services should be done directly in the other Eureka server, right? But this is not the case for me. If I shut down Eureka server 1, the restarted incances are no longer displayed in Eureka server 2 (or deregistered services are no longer taken out).
Can someone help me with this?
Thanks in advance!
server:
port: 8761
eureka:
instance:
appname: eureka-cluster
hostname: peer1
lease-expiration-duration-in-seconds: 90
server:
enable-self-preservation: true
expected-client-renewal-interval-seconds: 30
renewal-percent-threshold: 0.85
client:
serviceUrl:
defaultZone: http://peer2:8762/eureka
server:
port: 8762
eureka:
instance:
appname: eureka-cluster
hostname: peer2
lease-expiration-duration-in-seconds: 90
server:
enable-self-preservation: true
expected-client-renewal-interval-seconds: 30
renewal-percent-threshold: 0.85
client:
serviceUrl:
defaultZone: http://peer1:8761/eureka
spring:
application:
name: service
server:
port: 8000
eureka:
client:
service-url:
deaufaultZone: ${EUREKA_URI:{http://peer1:8761/eureka}, ${EUREKA_URI:{http://peer2:8762/eureka}
instance:
hostname: service
lease-renewal-interval-in-seconds: 30
Thanks for taking the time to read my post.
My issue is as such. I have 2 microservices (auth-service and image-service) deployed on Heroku, as well as a server Eureka and a gateway Zuul.
In local, all of this works.
However, when deployed, the same calls give me 404 errors : for example :
zuul is deployed on port 8762 in local,
so http://localhost:8762/images/user/create works, it points to http://localhost:8200/user/create of the image-service.
Deployed, https://croquis-time-image.herokuapp.com/user/create works, but https://croquis-time-zuul.herokuapp.com/images/user/create throws a 404 error.
On eureka however, all my services are registered, so the trouble doesn't come from there. I thought perhaps zuul didn't manage to get all the services from Eureka, but I'm not sure how to check.
More information :
application.yml of zuul deployed :
server:
port: 8762
eureka:
client:
serviceUrl:
defaultZone: https://croquis-time-eureka.herokuapp.com/eureka/
instance:
hostName: croquis-time-eureka.herokuapp.com
zuul:
#Service will be mapped under the /api URI
prefix: /api
# Uncomment to disable auto-registering all services read from Eureka
# ignoredServices: '*'
routes:
image-service:
path: /images/**
serviceId: image-service
auth-service:
path: /auth/**
serviceId: auth-service
stripPrefix: false
sensitiveHeaders: Cookie,Set-Cookie
spring:
application:
name: zuul-server
security:
jwt:
uri: /auth/**
prefix: Bearer
expiration: 86400
header: Authorization
secret: *****************
The application.yml of eureka deployed
server:
port: 8761
eureka:
instance:
hostname: croquis-time-eureka.herokuapp.com
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: https://croquis-time-eureka.herokuapp.com/eureka/
spring:
application:
name: eureka-server
The image service I'm trying to call :
server:
port: 8200
eureka:
client:
serviceUrl:
defaultZone: https://croquis-time-eureka.herokuapp.com/eureka/
instance:
hostName: croquis-time-eureka.herokuapp.com
spring:
application:
name: image-service
jpa:
showSql: true
hibernate:
ddlAuto: update
datasource:
url: jdbc:mysql://***********:3306/croquis-time
username: ******************
password: ****************
I have tried removing and adding the "ignored-services" from zuul to see if that was the problem, but it didn't change anything.
I'm very willing to edit my question with more information if you require more, I'm not sure where is the origin of the problem, so I'm a bit at a loss as to what to add.
Thanks !
you have an issue with the configuration of .yml in zuul server
Your .yml of zuul server must be:
instance:
hostName: croquis-time-zuul.herokuapp.com
And your .yml of image must be:
instance:
hostName: croquis-time-image.herokuapp.com
because instance.hostname is the host of your application acting as the eureka client. if you need more information please visit: https://blog.heroku.com/managing_your_microservices_on_heroku_with_netflix_s_eureka
I am introducing in microservices with spring and kubernetes.
I have gateway services made with spring-cloud-starter-netflix-zuul that works like an apigateway
I define Zull gateway like this:
server:
port: 8080
use-forward-headers: true
security:
basic:
enabled: false
oauth2:
resource:
jwk.key-set-uri: ${OAUTH_KEYSETURI}
spring:
config:
name: proxy-service
application:
name: proxy-service
zuul:
routes:
service-one:
path: /service-one/**
url: http://service-one:8080
serviceId: service-one
service-two:
path: /service-two/**
url: http://service-two:8080
serviceId: service-two
ribbon:
eureka:
enabled: false
eureka:
client:
enabled: false
error:
whitelabel:
enabled: false
But I found some problems, for example, that the requests have a limit per service, so I added the following lines:
zuul:
host:
max-per-route-connections: 100000
max-total-connections: 100000
I want to know. What is the most performant way to integrate spring-zuul with Kubernetes? I have read that it can also be integrated with spring-kubernetes-config, ribbon, and eureka. But doing it is more performant?
Recently I also read about spring-cloud-gateway. What is the difference with this project? Why spring has two gateway projects very similar? Are there differences in performance? Will both be supported in the future? What do you recommend to use?
I have a couple of microservices on Heroku - eureka-server, Zuul server and some app services.
While I am trying to reach any of my services, for example, "service1" via Zuul gateway, Zuul is unable to forward the request to the respective service (when I'm trying to run them locally everything works fine).
I've found the following errors in Zuul logs:
com.netflix.zuul.exception.ZuulException: Forwarding error
Caused by: com.netflix.client.ClientException: Load balancer does not have the available server for the client: service1
Below are configurations of my services:
1) "zuul server" application.yml
server:
port: ${PORT:8000}
zuul:
prefix: /api
ignoredServices: '*'
routes:
service1:
path: /path_for_service1/**
serviceId: service1
strip-prefix: false
...
management:
endpoints:
web:
exposure:
include: "*"
eureka:
client:
serviceUrl:
defaultZone: ${EUREKA_URL:http://localhost:5000}/eureka/
2) "eureka server" application.yml
server:
port: ${PORT:5000}
eureka:
instance:
hostname: localhost
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
3.1) "service1" application.yml
server.port=${PORT:8081}
eureka.client.service-url.defaultZone=${EUREKA_URL:http://localhost:5000}/eureka/
3.2) "service1" bootstrap.yml
spring:
application:
name: service1
All microservices are visible in eureka dashboard.
If I change zuul routes to hard-coded url it works well but it is not what I'm looking for.
zuul:
prefix: /api
ignoredServices: '*'
routes:
service1:
path: /path_for_service1/**
url: http://url_of_service_1
strip-prefix: false
Could you please help me with this issue?
Finally, I've found root cause :)
All services are registered in eureka using heroku hostname by default (like "085930c7-b893-4b34-88a7-6e37fbe7fa0f") which is not accessible outside.
But services are accessible by domain names.
So I just added domain name settings to application.properties of each service (https://blog.heroku.com/managing_your_microservices_on_heroku_with_netflix_s_eureka)
eureka:
instance:
non-secure-port: 80
hostname: ${DOMAIN_NAME}
and now it works.