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kandi has reviewed eureka and discovered the below as its top functions. This is intended to give you an instant insight into eureka implemented functionality, and help decide if they suit your requirements.
For aiding Netflix Asgard - an open source service which makes cloud deployments easier, in + Fast rollback of versions in case of problems avoiding the re-launch of 100’s of instances which could take a long time. + In rolling pushes, for avoiding propagation of a new version to all instances in case of problems.
For our cassandra deployments to take instances out of traffic for maintenance.
For our memcached caching services to identify the list of nodes in the ring.
For carrying other additional application specific metadata about services for various other reasons.
default
The build requires `java8` because of some required libraries that are `java8` (`servo`), but the source and target compatibility are still set to `1.7`.
Note that tags should be checked out to perform a build.
Support
Spring Cloud Gateway; Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway Issue
mvn dependency:tree
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
-----------------------
mvn dependency:tree
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
-----------------------
spring.main.web-application-type=reactive
Use main Gradle project to define all dependencies versions
dependencyResolutionManagement {
versionCatalogs {
libs {
library('spring-cloud-bom', 'org.springframework.cloud:spring-cloud-dependencies:2021.0.1')
library('spring-cloud-starter', 'org.springframework.cloud', 'spring-cloud-starter-netflix-eureka-client').withoutVersion()
library('spring-boot-starter-validation', 'org.springframework.boot', 'spring-boot-starter-validation').withoutVersion()
library('spring-boot-starter-test', 'org.springframework.boot', 'spring-boot-starter-test').withoutVersion()
library('threetenbp', 'org.threeten:threetenbp:1.5.1')
library('spring-boot-starter-actuator', 'org.springframework.boot', 'spring-boot-starter-actuator').withoutVersion()
library('lombok', 'org.projectlombok:lombok:1.18.22')
library('springfox-boot-starter', 'io.springfox:springfox-boot-starter:3.0.0')
library('spring-boot-starter-hateoas', 'org.springframework.boot:spring-boot-starter-hateoas:2.6.3')
library('hysterix-core', 'com.netflix.hystrix:hystrix-core:1.5.18')
library('spring-security-core', 'org.springframework.security:spring-security-core:5.6.1')
library('junit-jupiter-api', 'org.junit.jupiter:junit-jupiter-api:5.8.2')
library('junit-jupiter-engine', 'org.junit.jupiter:junit-jupiter-engine:5.8.2')
}
}
}
dependencies {
implementation libs.spring.cloud.starter
implementation libs.spring.boot.starter.validation
testImplementation libs.spring.boot.starter.test
implementation libs.threetenbp
implementation libs.spring.boot.starter.actuator
// Lombok
compileOnly libs.lombok
annotationProcessor libs.lombok
testCompileOnly libs.lombok
testAnnotationProcessor libs.lombok
// Swagger
implementation libs.springfox.boot.starter
implementation libs.spring.boot.starter.hateoas
implementation libs.hysterix.core
implementation libs.spring.security.core
testImplementation libs.junit.jupiter.api
testRuntimeOnly libs.junit.jupiter.engine
}
dependencyManagement {
imports {
mavenBom libs.spring.cloud.bom.get().toString()
}
resolutionStrategy {
cacheDynamicVersionsFor 0, "seconds"
cacheChangingModulesFor 0, "seconds"
}
}
-----------------------
dependencyResolutionManagement {
versionCatalogs {
libs {
library('spring-cloud-bom', 'org.springframework.cloud:spring-cloud-dependencies:2021.0.1')
library('spring-cloud-starter', 'org.springframework.cloud', 'spring-cloud-starter-netflix-eureka-client').withoutVersion()
library('spring-boot-starter-validation', 'org.springframework.boot', 'spring-boot-starter-validation').withoutVersion()
library('spring-boot-starter-test', 'org.springframework.boot', 'spring-boot-starter-test').withoutVersion()
library('threetenbp', 'org.threeten:threetenbp:1.5.1')
library('spring-boot-starter-actuator', 'org.springframework.boot', 'spring-boot-starter-actuator').withoutVersion()
library('lombok', 'org.projectlombok:lombok:1.18.22')
library('springfox-boot-starter', 'io.springfox:springfox-boot-starter:3.0.0')
library('spring-boot-starter-hateoas', 'org.springframework.boot:spring-boot-starter-hateoas:2.6.3')
library('hysterix-core', 'com.netflix.hystrix:hystrix-core:1.5.18')
library('spring-security-core', 'org.springframework.security:spring-security-core:5.6.1')
library('junit-jupiter-api', 'org.junit.jupiter:junit-jupiter-api:5.8.2')
library('junit-jupiter-engine', 'org.junit.jupiter:junit-jupiter-engine:5.8.2')
}
}
}
dependencies {
implementation libs.spring.cloud.starter
implementation libs.spring.boot.starter.validation
testImplementation libs.spring.boot.starter.test
implementation libs.threetenbp
implementation libs.spring.boot.starter.actuator
// Lombok
compileOnly libs.lombok
annotationProcessor libs.lombok
testCompileOnly libs.lombok
testAnnotationProcessor libs.lombok
// Swagger
implementation libs.springfox.boot.starter
implementation libs.spring.boot.starter.hateoas
implementation libs.hysterix.core
implementation libs.spring.security.core
testImplementation libs.junit.jupiter.api
testRuntimeOnly libs.junit.jupiter.engine
}
dependencyManagement {
imports {
mavenBom libs.spring.cloud.bom.get().toString()
}
resolutionStrategy {
cacheDynamicVersionsFor 0, "seconds"
cacheChangingModulesFor 0, "seconds"
}
}
-----------------------
dependencyResolutionManagement {
versionCatalogs {
libs {
library('spring-cloud-bom', 'org.springframework.cloud:spring-cloud-dependencies:2021.0.1')
library('spring-cloud-starter', 'org.springframework.cloud', 'spring-cloud-starter-netflix-eureka-client').withoutVersion()
library('spring-boot-starter-validation', 'org.springframework.boot', 'spring-boot-starter-validation').withoutVersion()
library('spring-boot-starter-test', 'org.springframework.boot', 'spring-boot-starter-test').withoutVersion()
library('threetenbp', 'org.threeten:threetenbp:1.5.1')
library('spring-boot-starter-actuator', 'org.springframework.boot', 'spring-boot-starter-actuator').withoutVersion()
library('lombok', 'org.projectlombok:lombok:1.18.22')
library('springfox-boot-starter', 'io.springfox:springfox-boot-starter:3.0.0')
library('spring-boot-starter-hateoas', 'org.springframework.boot:spring-boot-starter-hateoas:2.6.3')
library('hysterix-core', 'com.netflix.hystrix:hystrix-core:1.5.18')
library('spring-security-core', 'org.springframework.security:spring-security-core:5.6.1')
library('junit-jupiter-api', 'org.junit.jupiter:junit-jupiter-api:5.8.2')
library('junit-jupiter-engine', 'org.junit.jupiter:junit-jupiter-engine:5.8.2')
}
}
}
dependencies {
implementation libs.spring.cloud.starter
implementation libs.spring.boot.starter.validation
testImplementation libs.spring.boot.starter.test
implementation libs.threetenbp
implementation libs.spring.boot.starter.actuator
// Lombok
compileOnly libs.lombok
annotationProcessor libs.lombok
testCompileOnly libs.lombok
testAnnotationProcessor libs.lombok
// Swagger
implementation libs.springfox.boot.starter
implementation libs.spring.boot.starter.hateoas
implementation libs.hysterix.core
implementation libs.spring.security.core
testImplementation libs.junit.jupiter.api
testRuntimeOnly libs.junit.jupiter.engine
}
dependencyManagement {
imports {
mavenBom libs.spring.cloud.bom.get().toString()
}
resolutionStrategy {
cacheDynamicVersionsFor 0, "seconds"
cacheChangingModulesFor 0, "seconds"
}
}
parsing error in yml file for microservices
server:
port: 9190
spring:
application:
name: API-Gateway
cloud:
gateway:
routes:
- id: user-service
uri: lb://DEPT-SERVICE
predicates:
- path=/user/**
- id: dept-service
uri: lb://USER-SERVICE
predicates:
- path=/departments/**
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka
instance:
preferIpAddress: true
Spring RestTemplate and getForObject for Microservices issues
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
org.thymeleaf.exceptions.TemplateInputException:
Error resolving template [<viewname>], template might not
exist or might not be accessible by any of the configured Template Resolvers
-----------------------
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
org.thymeleaf.exceptions.TemplateInputException:
Error resolving template [<viewname>], template might not
exist or might not be accessible by any of the configured Template Resolvers
How to install nc in mysql container
FROM mysql:8
RUN apt-get -q update && apt-get -qy install netcat
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
-----------------------
#!/bin/sh
# ./entrypoint.sh
# Set defaults for common environment variables
: ${MYSQL_PORT:=3306}
: ${MYSQL_DATABASE:=usermanagementappdp}
# Wait for the database to be ready
./wait-for.sh "$MYSQL_HOST:$MYSQL_PORT"
# Dynamically set the Spring database URL
export SPRING_DATASOURCE_URL="jdbc:mysql://$MYSQL_HOST:$MYSQL_PORT/$MYSQL_DATABASE?allowPublicKeyRetrieval=true&autoReconnect=true&useSSL=false"
# Run the main container command
exec "$@"
FROM openjdk:8
# Install OS-level dependencies before COPYing anything in
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive \
apt-get install --no-install-recommends --assume-yes \
netcat
# COPY in the actual application (don't usually ADD things)
WORKDIR /app
COPY target/User-Management-App-0.0.1-SNAPSHOT.jar app.jar
COPY wait-for.sh entrypoint.sh .
# Set metadata for how to run the application
EXPOSE 8089
ENTRYPOINT ["./entrypoint.sh"] # must be JSON-array syntax
CMD ["java", "-jar", "app.jar"]
version: "3.8"
services:
mysql-standalone:
image: mysql:8.0.25
environment:
- MYSQL_ROOT_PASSWORD=********
- MYSQL_DATABASE=usermanagementappdp
ports:
- 3306:3306
phpmyadmin: { image: phpmyadmin/phpmyadmin, ... }
eureka-server:
build: ../Eureka-Server-For-User-Management-App
usermanagementapp-docker:
ports:
- 8089:8089
environment:
EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://eureka-server:8761/eureka
MYSQL_HOST: mysql-standalone
build: .
restart: on-failure
depends_on: [mysql-standalone, eureka-server]
docker pull mysql:8.0.25
#!/bin/sh
# my-entrypoint.sh
...
exec docker-entrypoint.sh "$@" # running the original entrypoint
FROM mysql:8.0.27
...
COPY wait-for.sh my-entrypoint.sh /usr/local/bin
ENTRYPOINT ["my-entrypoint.sh"]
CMD ["mysqld"]
services:
mysql-standalone:
build: ./mysql
# no image:
How to make a proper reactive extension on Eureka SelectableSection
extension Reactive {
func selectedValue<Row, T>() -> Observable<T?> where Base: SelectableSection<Row>, Row: SelectableRowType, T == Row.Cell.Value {
Observable.create { [base] observer in
base.onSelectSelectableRow = { cell, row in
observer.onNext(row.value) // this is problematic. See below.
}
return Disposables.create {
observer.onCompleted() // this is wrong. See below.
}
}
}
}
extension Reactive {
func selectedValue<Row, T>() -> Observable<T?> where Base: SelectableSection<Row>, Row: SelectableRowType, T == Row.Cell.Value {
Observable.create { [base] observer in
if let block = selectableSections.first(where: { $0.section === base }) {
let subject = block.subject as! PublishSubject<T?>
return Disposables.create(
block.disposable.retain(),
subject.subscribe(observer)
)
}
else {
let subject = PublishSubject<T?>()
let block = SelectableSectionBlock(
section: base,
subject: subject,
disposable: RefCountDisposable(disposable: Disposables.create {
selectableSections.removeAll(where: { $0.section === base })
})
)
base.onSelectSelectableRow = { cell, row in
subject.onNext(row.value)
}
selectableSections.append(block)
return Disposables.create(
block.disposable,
subject.subscribe(observer)
)
}
}
}
}
private struct SelectableSectionBlock {
let section: Section
let subject: Any
let disposable: RefCountDisposable
}
private var selectableSections = [SelectableSectionBlock]()
-----------------------
extension Reactive {
func selectedValue<Row, T>() -> Observable<T?> where Base: SelectableSection<Row>, Row: SelectableRowType, T == Row.Cell.Value {
Observable.create { [base] observer in
base.onSelectSelectableRow = { cell, row in
observer.onNext(row.value) // this is problematic. See below.
}
return Disposables.create {
observer.onCompleted() // this is wrong. See below.
}
}
}
}
extension Reactive {
func selectedValue<Row, T>() -> Observable<T?> where Base: SelectableSection<Row>, Row: SelectableRowType, T == Row.Cell.Value {
Observable.create { [base] observer in
if let block = selectableSections.first(where: { $0.section === base }) {
let subject = block.subject as! PublishSubject<T?>
return Disposables.create(
block.disposable.retain(),
subject.subscribe(observer)
)
}
else {
let subject = PublishSubject<T?>()
let block = SelectableSectionBlock(
section: base,
subject: subject,
disposable: RefCountDisposable(disposable: Disposables.create {
selectableSections.removeAll(where: { $0.section === base })
})
)
base.onSelectSelectableRow = { cell, row in
subject.onNext(row.value)
}
selectableSections.append(block)
return Disposables.create(
block.disposable,
subject.subscribe(observer)
)
}
}
}
}
private struct SelectableSectionBlock {
let section: Section
let subject: Any
let disposable: RefCountDisposable
}
private var selectableSections = [SelectableSectionBlock]()
Issue selecting multiple inputs using selectInput
server <- function(input, output, session){
observeEvent(input$data1, {
if (input$data1 != "All") {
updateSelectInput(session, "data2", "Select County", choices = c("All", unique(df$County[df$State %in% input$data1])))
} else {
updateSelectInput(session, "data2", "Select County", choices = c("All", unique(df$County)))
}
}, priority = 2)
observeEvent(c(input$data1, input$data2), {
req(input$data2)
if (input$data2 != "All") {
updateSelectInput(session, "data3", "Select City", choices = c("All", unique(df$City[df$County %in% input$data2])))
} else {
if (input$data1 != "All") {
updateSelectInput(session, "data3", "Select City", choices = c("All", unique(df$City[df$State %in% input$data1])))
} else {
updateSelectInput(session, "data3", "Select City", choices = c("All", unique(df$City)))
}
}
}, priority = 1)
filtered_data <- reactive({
temp_data <- df
req(input$data2,input$data3)
if (input$data1 != "All") {
temp_data <- temp_data[temp_data$State %in% input$data1, ]
}
if (input$data2 != "All") {
temp_data <- temp_data[temp_data$County %in% input$data2, ]
}
if (input$data3 != "All") {
temp_data <- temp_data[temp_data$City %in% input$data3, ]
}
temp_data
})
output$table <- renderDT(
filtered_data()
)
}
whitelabel error page 404 spring boot microservices Rest Controller
package com.example.microservices;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class CitizenDetailServiceApplication {
public static void main(String[] args) {
SpringApplication.run(CitizenDetailServiceApplication.class, args);
}
}
jhipster microservices client springcloud config with authorization header to jhipster registry
jhipster:
xxxxxxxxx
registry:
password: xxxxxxxxxxxxx
jhipster:
registry:
password: <correct_password>
██╗ ██╗ ██╗ ████████╗ ███████╗ ██████╗ ████████╗ ████████╗ ███████╗
██║ ██║ ██║ ╚══██╔══╝ ██╔═══██╗ ██╔════╝ ╚══██╔══╝ ██╔═════╝ ██╔═══██╗
██║ ████████║ ██║ ███████╔╝ ╚█████╗ ██║ ██████╗ ███████╔╝
██╗ ██║ ██╔═══██║ ██║ ██╔════╝ ╚═══██╗ ██║ ██╔═══╝ ██╔══██║
╚██████╔╝ ██║ ██║ ████████╗ ██║ ██████╔╝ ██║ ████████╗ ██║ ╚██╗
╚═════╝ ╚═╝ ╚═╝ ╚═══════╝ ╚═╝ ╚═════╝ ╚═╝ ╚═══════╝ ╚═╝ ╚═╝
:: JHipster 🤓 :: Running Spring Boot 2.5.4 ::
:: https://www.jhipster.tech ::
2021-11-08 11:36:28.507 INFO 3872 --- [ main] com.okta.developer.store.StoreApp : No active profile set, falling back to default profiles: dev,api-docs
2021-11-08 11:36:29.639 DEBUG 3872 --- [ main] i.g.r.utils.RxJava2OnClasspathCondition : RxJava2 related Aspect extensions are not activated, because RxJava2 is not on the classpath.
2021-11-08 11:36:29.641 DEBUG 3872 --- [ main] i.g.r.utils.ReactorOnClasspathCondition : Reactor related Aspect extensions are not activated because Resilience4j Reactor module is not on the classpath.
2021-11-08 11:36:29.656 DEBUG 3872 --- [ main] i.g.r.utils.RxJava2OnClasspathCondition : RxJava2 related Aspect extensions are not activated, because RxJava2 is not on the classpath.
-----------------------
jhipster:
xxxxxxxxx
registry:
password: xxxxxxxxxxxxx
jhipster:
registry:
password: <correct_password>
██╗ ██╗ ██╗ ████████╗ ███████╗ ██████╗ ████████╗ ████████╗ ███████╗
██║ ██║ ██║ ╚══██╔══╝ ██╔═══██╗ ██╔════╝ ╚══██╔══╝ ██╔═════╝ ██╔═══██╗
██║ ████████║ ██║ ███████╔╝ ╚█████╗ ██║ ██████╗ ███████╔╝
██╗ ██║ ██╔═══██║ ██║ ██╔════╝ ╚═══██╗ ██║ ██╔═══╝ ██╔══██║
╚██████╔╝ ██║ ██║ ████████╗ ██║ ██████╔╝ ██║ ████████╗ ██║ ╚██╗
╚═════╝ ╚═╝ ╚═╝ ╚═══════╝ ╚═╝ ╚═════╝ ╚═╝ ╚═══════╝ ╚═╝ ╚═╝
:: JHipster 🤓 :: Running Spring Boot 2.5.4 ::
:: https://www.jhipster.tech ::
2021-11-08 11:36:28.507 INFO 3872 --- [ main] com.okta.developer.store.StoreApp : No active profile set, falling back to default profiles: dev,api-docs
2021-11-08 11:36:29.639 DEBUG 3872 --- [ main] i.g.r.utils.RxJava2OnClasspathCondition : RxJava2 related Aspect extensions are not activated, because RxJava2 is not on the classpath.
2021-11-08 11:36:29.641 DEBUG 3872 --- [ main] i.g.r.utils.ReactorOnClasspathCondition : Reactor related Aspect extensions are not activated because Resilience4j Reactor module is not on the classpath.
2021-11-08 11:36:29.656 DEBUG 3872 --- [ main] i.g.r.utils.RxJava2OnClasspathCondition : RxJava2 related Aspect extensions are not activated, because RxJava2 is not on the classpath.
-----------------------
jhipster:
xxxxxxxxx
registry:
password: xxxxxxxxxxxxx
jhipster:
registry:
password: <correct_password>
██╗ ██╗ ██╗ ████████╗ ███████╗ ██████╗ ████████╗ ████████╗ ███████╗
██║ ██║ ██║ ╚══██╔══╝ ██╔═══██╗ ██╔════╝ ╚══██╔══╝ ██╔═════╝ ██╔═══██╗
██║ ████████║ ██║ ███████╔╝ ╚█████╗ ██║ ██████╗ ███████╔╝
██╗ ██║ ██╔═══██║ ██║ ██╔════╝ ╚═══██╗ ██║ ██╔═══╝ ██╔══██║
╚██████╔╝ ██║ ██║ ████████╗ ██║ ██████╔╝ ██║ ████████╗ ██║ ╚██╗
╚═════╝ ╚═╝ ╚═╝ ╚═══════╝ ╚═╝ ╚═════╝ ╚═╝ ╚═══════╝ ╚═╝ ╚═╝
:: JHipster 🤓 :: Running Spring Boot 2.5.4 ::
:: https://www.jhipster.tech ::
2021-11-08 11:36:28.507 INFO 3872 --- [ main] com.okta.developer.store.StoreApp : No active profile set, falling back to default profiles: dev,api-docs
2021-11-08 11:36:29.639 DEBUG 3872 --- [ main] i.g.r.utils.RxJava2OnClasspathCondition : RxJava2 related Aspect extensions are not activated, because RxJava2 is not on the classpath.
2021-11-08 11:36:29.641 DEBUG 3872 --- [ main] i.g.r.utils.ReactorOnClasspathCondition : Reactor related Aspect extensions are not activated because Resilience4j Reactor module is not on the classpath.
2021-11-08 11:36:29.656 DEBUG 3872 --- [ main] i.g.r.utils.RxJava2OnClasspathCondition : RxJava2 related Aspect extensions are not activated, because RxJava2 is not on the classpath.
Ansible - nested loop over object without knowing object/key name
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- - - - -1
- - 100
- - - - 100
- - 100
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) | flatten }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- -1
- 100
- 100
- 100
-----------------------
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- - - - -1
- - 100
- - - - 100
- - 100
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) | flatten }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- -1
- 100
- 100
- 100
-----------------------
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- - - - -1
- - 100
- - - - 100
- - 100
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) | flatten }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- -1
- 100
- 100
- 100
-----------------------
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- - - - -1
- - 100
- - - - 100
- - 100
- name: Get the value of the key 1h
debug:
msg: "{{ etat_ms_rep.results | json_query(jmesquery) | flatten }}"
vars:
jmesquery: '[].*.*.["1h"]'
msg:
- -1
- 100
- 100
- 100
QUESTION
Building Docker image from spring maven project for arm64 platform
Asked 2022-Mar-24 at 00:10I'm in a Spring course, and I have a maven application (downloaded from the course resources) built from spring initializr. I can build a local Docker image with mvn spring-boot:build-image
(no Dockerfile in the project). By default a Docker image is built as linux/amd64, but I am working with a M1 Apple Silicon chip (arm64). I've been looking many workarounds but with no success. Lastly, I found that maybe adding a Dockerfile and specifying the platform it would build the image accordingly.
My goal is to build a docker image for arm64 architecture.
So, I created a Dockerfile:
FROM --platform=linux/arm64 maven:3.8.4-jdk-11 AS build
COPY src /home/path_to_app/src
COPY pom.xml /home/path_to_app
RUN mvn -f /home/path_to_app/pom.xml spring-boot:build-image -DskipTests
My project structure is:
In terminal, at same pom.xml directory I run: docker buildx build --platform linux/arm64 --tag <mytag> .
Logs successful until =>Building image 'docker.io/myusername/myimage:mytag', then an exception occurs and build fails.
#8 125.7 [INFO]
#8 125.7 [INFO] <<< spring-boot-maven-plugin:2.5.0:build-image (default-cli) < package @ currency-exchange-service <<<
#8 125.7 [INFO]
#8 125.7 [INFO]
#8 125.7 [INFO] --- spring-boot-maven-plugin:2.5.0:build-image (default-cli) @ currency-exchange-service ---
#8 125.8 [INFO] Building image 'docker.io/myname/myimage:0.0.1-SNAPSHOT'
#8 125.8 [INFO]
#8 125.8 [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [2] No such file or directory
#8 125.8 [INFO] Retrying request to {}->docker://localhost:2376
#8 125.8 [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [2] No such file or directory
#8 125.8 [INFO] Retrying request to {}->docker://localhost:2376
#8 125.8 [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [2] No such file or directory
#8 125.8 [INFO] Retrying request to {}->docker://localhost:2376
#8 125.9 [INFO] ------------------------------------------------------------------------
#8 125.9 [INFO] BUILD FAILURE
#8 125.9 [INFO] ------------------------------------------------------------------------
#8 125.9 [INFO] Total time: 02:04 min
#8 125.9 [INFO] Finished at: 2022-03-22T21:08:20Z
#8 125.9 [INFO] ------------------------------------------------------------------------
#8 125.9 [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.5.0:build-image
(default-cli) on project currency-exchange-service: Execution default-cli
of goal org.springframework.boot:spring-boot-maven-plugin:2.5.0:build-image
failed: Connection to the Docker daemon at 'localhost' failed with error "[2]
No such file or directory"; ensure the Docker daemon is running and accessible:
com.sun.jna.LastErrorException: [2] No such file or directory -> [Help 1]
My pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.0</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.somename.microservices</groupId>
<artifactId>mymicroservice-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mymicroservice-service-docker</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
<spring-cloud.version>2020.0.2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-sleuth-zipkin</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.amqp</groupId>
<artifactId>spring-rabbit</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-spring-boot2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<image>
<name>myusername/myprefix${project.artifactId}:${project.version}</name>
</image>
<pullPolicy>IF_NOT_PRESENT</pullPolicy>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
My docker daemon is running. Can't figure out why it tries to reach localhost:2376 (There is no such port in my project). My DOCKER_HOST is set to unix:///var/run/docker.sock and works fine. Tried to add to daemon.json:
{
"hosts": ["tcp://127.0.0.1:2376", "unix:///var/run/docker.sock"]
}
but docker daemon can't initialize (binding error, port already in use)
I don't know where does com.sun.jna.LastErrorException
come from.
I suspect that maybe Docker in docker (dind) is needed, but I don't know how to set it up in my Dockerfile. Or maybe a port binding configuration.
Thank in advance for any help!!!
Note: I just want to build the image locally. I don't wish pushing to docker registry. I don't want any other stages in the build process.
ANSWER
Answered 2022-Mar-24 at 00:10Building an ARM-based image is not currently possible with mvn spring-boot:build-image
, because the Cloud Native Buildpacks builders that Spring Boot integrates with do not support this. This is one of the possible items of focus on the Paketo buildpacks 2022 roadmap, which you can cast votes for.
CNB documents a work-around for this, but it's not simple to set up and run.
RUN mvn -f /home/path_to_app/pom.xml spring-boot:build-image -DskipTests
You would need Docker-in-Docker to make something like this work, since the CNB builder processes that would run inside the Docker container need to talk to the Docker daemon. Regardless, this would not allow you to build an ARM image for the reasons stated above.
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