I searched most of the articles, but not found my expected solutions. I am new to Prometheus. I need to get the Prometheus metrics to collect by my java program. So, need help to read or get the Prometheus metrics by my java program.
Any help or suggestion would be helpful.
Thanks
If you are using Spring boot 2.1.5.RELEASE then
add dependencies actuator and micrometer-prometheus
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-prometheus</artifactId>
</dependency>
add config to enable access to endpoint /actuator/prometheus
management:
endpoints:
web:
exposure:
include: '*'
try to request http://domain:port/actuator/prometheus
EDIT
For kubernetes im using kind deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
name: myAppName
spec:
replicas: 1
selector:
matchLabels:
app: myAppName
template:
metadata:
labels:
app: myAppName
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: "8091"
prometheus.io/path: "/actuator/prometheus"
spec:
containers:
- name: myAppName
image: images.com/app-service:master
imagePullPolicy: Always
ports:
- containerPort: 8091
env:
- name: INSTANCE_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: SPRING_PROFILES_ACTIVE
value: "prod"
- name: CONFIG_SERVER_ADDRESS
value: "http://config-server:8888"
livenessProbe:
failureThreshold: 3
httpGet:
path: /actuator/health
port: 8091
scheme: HTTP
initialDelaySeconds: 45
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 5
readinessProbe:
failureThreshold: 5
httpGet:
path: /actuator/health
port: 8091
scheme: HTTP
initialDelaySeconds: 30
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 5
nodeSelector:
servicetype: mvp-cluster
There are bunch of ways you can do it Please refer this https://github.com/prometheus/client_java
Related
I'm trying to deploy kafka on local k8s, then I need to connect to it by application and using offset explorer
so, using kubectl I created zookeeper service and deployment using this yml file
apiVersion: v1
kind: Service
metadata:
labels:
app: zookeeper-service
name: zookeeper-service
spec:
type: NodePort
ports:
- name: zookeeper-port
port: 2181
nodePort: 30181
targetPort: 2181
selector:
app: zookeeper
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: zookeeper
name: zookeeper
spec:
replicas: 1
selector:
matchLabels:
app: zookeeper
template:
metadata:
labels:
app: zookeeper
spec:
containers:
- image: wurstmeister/zookeeper
imagePullPolicy: IfNotPresent
name: zookeeper
ports:
- containerPort: 2181
Then, I created kafka service and deployment using this yml
apiVersion: v1
kind: Service
metadata:
labels:
app: kafka-service
name: kafka-service
spec:
type: NodePort
ports:
- name: kafka-port
port: 9092
nodePort: 30182
targetPort: 9092
selector:
app: kafka-broker
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: kafka-broker
name: kafka-broker
spec:
replicas: 1
selector:
matchLabels:
app: kafka-broker
template:
metadata:
labels:
app: kafka-broker
spec:
hostname: kafka-broker
containers:
- env:
- name: KAFKA_BROKER_ID
value: "1"
- name: KAFKA_ZOOKEEPER_CONNECT
value: 10.97.29.226:2181
- name: KAFKA_LISTENERS
value: PLAINTEXT://:9092
- name: KAFKA_ADVERTISED_LISTENERS
value: PLAINTEXT://kafka-broker:9092
image: wurstmeister/kafka
imagePullPolicy: IfNotPresent
name: kafka-broker
ports:
- containerPort: 9092
And both services and deployment created and running
but, when I try to connect to this kafka using offset key tool, there is error connection.
If I define only this page , there is success connection, but error when try to view kafka topic
error message
then I add borker description on advanced page like this
But there is error message Error connecting to the cluster, Fail to create new KafkaAdminClient
I have a problem about running Spring Boot Microservices on Kubernetes. After I installed minikube, I started it and open its dashboard.
Here is the commands to open dashboards.
1 ) minikube start
2 ) minikube dashboard
Next, I run all services through this command.
kubectl apply -f k8s
After waiting for a certain amount of time, I got this issue shown below.
15:22:37.395 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.cloud.config.client.ConfigClientFailFastException: Could not locate PropertySource and the resource is not optional, failing
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.doLoad(ConfigServerConfigDataLoader.java:197)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.load(ConfigServerConfigDataLoader.java:102)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.load(ConfigServerConfigDataLoader.java:61)
at org.springframework.boot.context.config.ConfigDataLoaders.load(ConfigDataLoaders.java:107)
at org.springframework.boot.context.config.ConfigDataImporter.load(ConfigDataImporter.java:128)
at org.springframework.boot.context.config.ConfigDataImporter.resolveAndLoad(ConfigDataImporter.java:86)
at org.springframework.boot.context.config.ConfigDataEnvironmentContributors.withProcessedImports(ConfigDataEnvironmentContributors.java:116)
at org.springframework.boot.context.config.ConfigDataEnvironment.processWithProfiles(ConfigDataEnvironment.java:311)
at org.springframework.boot.context.config.ConfigDataEnvironment.processAndApply(ConfigDataEnvironment.java:232)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:102)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:94)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:102)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:87)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:344)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:302)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295)
at com.microservice.orderservice.OrderServiceApplication.main(OrderServiceApplication.java:15)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65)
Caused by: org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://config-server-svc:9296/ORDER-SERVICE/default": connect timed out; nested exception is java.net.SocketTimeoutException: connect timed out
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:785)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:602)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.getRemoteEnvironment(ConfigServerConfigDataLoader.java:303)
at org.springframework.cloud.config.client.ConfigServerConfigDataLoader.doLoad(ConfigServerConfigDataLoader.java:118)
... 35 common frames omitted
Caused by: java.net.SocketTimeoutException: connect timed out
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
at java.base/java.net.Socket.connect(Socket.java:609)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:508)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:603)
at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:276)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:375)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:396)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1253)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015)
at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:76)
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:776)
... 39 common frames omitted
Here is my deployment.yaml file shown below.
apiVersion: apps/v1
kind: Deployment
metadata:
name: auth-service-app
spec:
selector:
matchLabels:
app: auth-service-app
template:
metadata:
labels:
app: auth-service-app
spec:
containers:
- name: auth-service-app
image: noyandocker/authservice
imagePullPolicy: IfNotPresent
ports:
- containerPort: 7777
env:
- name: CONFIG_SERVER_URL
valueFrom:
configMapKeyRef:
name: config-cm
key: config_url
- name: EUREKA_SERVER_ADDRESS
valueFrom:
configMapKeyRef:
name: eureka-cm
key: eureka_service_address
- name: DB_HOST
valueFrom:
configMapKeyRef:
name: mysql-cm
key: hostname
---
apiVersion: v1
kind: Service
metadata:
name: auth-service-svc
spec:
selector:
app: auth-service-app
ports:
- port: 80
targetPort: 7777
Here is the configmap yaml file shown below
apiVersion: v1
kind: ConfigMap
metadata:
name: config-cm
data:
config_url: "config-server-svc"
---
apiVersion: v1
kind: ConfigMap
metadata:
name: eureka-cm
data:
eureka_service_address: "http://eureka-0.eureka:8761/eureka"
---
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql-cm
data:
hostname: "mysql-0.mysql"
Here is the config server yaml file shown below
apiVersion: apps/v1
kind: Deployment
metadata:
name: config-server-app
spec:
selector:
matchLabels:
app: config-server-app
template:
metadata:
labels:
app: config-server-app
spec:
containers:
- name: config-server-app
image: noyandocker/configserver
imagePullPolicy: IfNotPresent
ports:
- containerPort: 9296
readinessProbe:
httpGet:
path: /actuator/health
port: 9296
initialDelaySeconds: 20
timeoutSeconds: 10
periodSeconds: 3
failureThreshold: 10
livenessProbe:
httpGet:
path: /actuator/health
port: 9296
initialDelaySeconds: 30
timeoutSeconds: 2
periodSeconds: 8
failureThreshold: 10
env:
- name: EUREKA_SERVER_ADDRESS
valueFrom:
configMapKeyRef:
name: eureka-cm
key: eureka_service_address
---
apiVersion: v1
kind: Service
metadata:
name: config-server-svc
spec:
selector:
app: config-server-app
ports:
- port: 80
targetPort: 9296
I thought all the services will start simultaneously. Config Server is the Dependent Service for all other Serivces like auth service and this Auth service should not start until Config Server service is up and running.
Editted
I added this code snippets shown below in cloud_gateway_deployment.yaml file but it didn't work.
initContainers:
- name: init-configserver
image: noyandocker/configserver
command: [ 'sh', '-c', "until nslookup config-server-svc.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).svc.cluster.local; do echo waiting for config server; sleep 2; done" ]
How can I do that?
Here is my repo : Link
Here is my docker hub : Link
Here is git backend system : Link
If you have a dependency you need other services to wait on, I'd suggest implementing an init container, which will allow you to program the k8s deployment to wait for some dependency to exist or finish starting up. We've done something similar for a database, since many of our spring boot services in k8s need a database to be up.
https://kubernetes.io/docs/concepts/workloads/pods/init-containers/
Also, make sure you familiarize yourself with the way the k8s network routing works, and DNS for other pods, which uses their name.
https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/
I wanted to try and deploy my spring boot application on kubernetes. I setted up a test environment with microk8s (dns,storage,ingress enabled) which consists of a pod running the application itself and a pod with the MySQL database. Each pod has its own service and is running on the same default namespace. The yaml files can be seen bellow:
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deployment
spec:
replicas: 1
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: test-app
image: myImage
ports:
- containerPort: 8080
imagePullPolicy: Always
env:
- name: SPRING_APPLICATION_JSON
valueFrom:
configMapKeyRef:
name: spring-config
key: app-config.json
Application Service:
apiVersion: v1
kind: Service
metadata:
name: myapp-service
spec:
selector:
app: myapp
ports:
- port: 8080
targetPort: 8080
Mysql Deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql-server
labels:
# app: mysql
app: mysql
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
volumes:
- name: mysql-persistent-volume-storage
persistentVolumeClaim:
claimName: mysql-pvc-claim
containers:
- name: mysql
image: mysql
volumeMounts:
- name: mysql-persistent-volume-storage
mountPath: /var/lib/mysql
subPath: mysql-server
env:
- name: MYSQL_ROOT_PASSWORD
value: pass_root
- name: MYSQL_USER
value: user
- name: MYSQL_PASSWORD
value: pass
- name: MYSQL_DATABASE
value: test
ports:
- containerPort: 3306
Mysql Service:
apiVersion: v1
kind: Service
metadata:
name: db-service
spec:
selector:
app: mysql
ports:
- port: 3306
targetPort: 3306
For some reason my application can't use the database. It throws this error:
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:833) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:453) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:121) ~[HikariCP-4.0.3.jar!/:na]
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364) ~[HikariCP-4.0.3.jar!/:na]
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561) ~[HikariCP-4.0.3.jar!/:na]
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-4.0.3.jar!/:na]
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-4.0.3.jar!/:na]
.......
The application.yml:
db:
datasource:
url: jdbc:mysql://ip/test
user: user
password: pass
---
spring:
datasource:
url: ${db.datasource.url}
username: ${db.datasource.user}
password: ${db.datasource.password}
driver-class-name: com.mysql.cj.jdbc.Driver
jpa:
database-platform: org.hibernate.dialect.MySQLDialect
mvc:
view:
suffix: .html
thymeleaf:
cache: false
allowPublicKeyRetrieval: true
hibernate:
show_sql: true
logging:
level:
org:
hibernate:
SQL: debug
I tried accessing the service from another pod on the namespace running mysql, since it has the mysql-client pre installed, and from the host. Both had access to database. I also tring ping on the pod running the application. It found the service withoyt any problem.
Then I tried using NodePort instead of ClusterIP. Nothing changed.
I made sure the credentials are correct.
Finally, I tried removing and adding the port in the application.yml.
I am completely stuck and I have no idea what's the problem. Any help would be appreciated.
I spot two problems in your configuration: The username/password in your mysql deployment does not match the values in your application.yaml.
The other one is that you use a property that spring boot does not use by default and I assume you have no special logic to handle that: "spring.data.url" should be "spring.datasource.url".
Note that it should be "spring.datasource.username" , not "user" as well.
Referring to your 'db' section in the YAML: In general I would not recommend to have a separate section for the database credentials and reference it using variables as well.
I created yaml files and deployed the service on kubernetes and istio. Everything looks fine but when I test the service it gives a 404 NOT FOUND. I am not sure if I missed something. Does anyone have any solutions for this or where I might be wrong? Here are the yaml files:
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: login-register-vs
spec:
hosts:
- "*"
gateways:
- webapp-gateway
http:
- match:
- uri:
prefix: /loginregister
route:
- destination:
port:
number: 8080
host: login-register-service
The above code is virtual-service code.
This is the web-service code.
apiVersion: v1
kind: Service
metadata:
name: login-register-service
labels:
app: login-register-service
spec:
ports:
- name: http
port: 8080
selector:
app: login-register-service
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: login-register
spec:
replicas: 1
template:
metadata:
labels:
app: login-register-service
version: v1
spec:
containers:
- name: login-register-service
image: {ImageName}
imagePullPolicy: IfNotPresent
ports:
- containerPort: 8080
The error message which I got on postman is
404 NOT FOUND
{
"timestamp": "2020-07-22T18:15:28.206+00:00",
"status": 404,
"error": "Not Found",
"message": "",
"path": "/loginregister/sms/auth"
}
What is the definition of gateway 'webapp-gateway' ?
In kubernetes cluster Spring boot application not able to connect mysql on more than one containers.
Ex. I have Mysql Container Running and i have spring boot application which connect to mysql container, everything works fine if i have one spring boot application
But if i scale the Spring boot component to ex 4 pods then one of them will not be able to connect to mysql container
Please help on this
Logs
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_111]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_111]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_111]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_111]
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
at com.mysql.cj.NativeSession.connect(NativeSession.java:144) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:850) ~[mysql-connector-java-8.0.19.jar!/:8.0.19]
... 58 common frames omitted
Caused by: java.net.UnknownHostException: some-mysql
Kubernetes Mysql Deployment File
apiVersion: v1
kind: PersistentVolume
metadata:
name: mysql-pv
labels:
type: local
spec:
storageClassName: standard
capacity:
storage: 250Mi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
persistentVolumeReclaimPolicy: Retain
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql-pv-claim
labels:
app: practice-app
spec:
storageClassName: standard
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 250Mi
---
apiVersion: v1
kind: Service
metadata:
name: some-mysql
labels:
app: practice-app
spec:
ports:
- port: 3306
selector:
app: practice-app
tier: mysql
clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: some-mysql
labels:
app: practice-app
spec:
selector:
matchLabels:
app: practice-app
tier: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: practice-app
tier: mysql
spec:
containers:
- image: mysql:5.6
name: mysql
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-root-pass
key: password
- name: MYSQL_DATABASE
valueFrom:
secretKeyRef:
name: mysql-db-url
key: database
- name: MYSQL_USER
valueFrom:
secretKeyRef:
name: mysql-user-pass
key: username
- name: MYSQL_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-user-pass
key: password
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql
volumes:
- name: mysql-persistent-storage
persistentVolumeClaim:
claimName: mysql-pv-claim
Kubernetes Spring Boot Deployment file
apiVersion: apps/v1 # API version
kind: Deployment # Type of kubernetes resource
metadata:
name: order-app-server # Name of the kubernetes resource
labels: # Labels that will be applied to this resource
app: order-app-server
spec:
replicas: 1 # No. of replicas/pods to run in this deployment
selector:
matchLabels: # The deployment applies to any pods mayching the specified labels
app: order-app-server
template: # Template for creating the pods in this deployment
metadata:
labels: # Labels that will be applied to each Pod in this deployment
app: order-app-server
spec: # Spec for the containers that will be run in the Pods
imagePullSecrets:
- name: testXxxxxsecret
containers:
- name: order-app-server
image: XXXXXX/order:latest
ports:
- containerPort: 8080 # The port that the container exposes
env: # Environment variables supplied to the Pod
- name: SPRING_DATASOURCE_USERNAME # Name of the environment variable
valueFrom: # Get the value of environment variable from kubernetes secrets
secretKeyRef:
name: mysql-user-pass
key: username
- name: SPRING_DATASOURCE_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-user-pass
key: password
- name: SPRING_DATASOURCE_URL
valueFrom:
secretKeyRef:
name: mysql-db-url
key: url
---
apiVersion: v1 # API version
kind: Service # Type of the kubernetes resource
metadata:
name: order-app-server-service # Name of the kubernetes resource
labels: # Labels that will be applied to this resource
app: order-app-server
spec:
type: LoadBalancer # The service will be exposed by opening a Port on each node and proxying it.
selector:
app: order-app-server # The service exposes Pods with label `app=polling-app-server`
ports: # Forward incoming connections on port 8080 to the target port 8080
- name: http
port: 8080
Spring boot application yml
spring:
application:
name: order-service
datasource:
url: jdbc:mysql://some-mysql:3306/practicecommerce?autoReconnect=true&failOverReadOnly=false&maxReconnects=10&useSSL=false&allowPublicKeyRetrieval=true
username: prac
password: prac
jpa:
hibernate:
naming:
physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
ddl-auto: update
properties:
hibernate.dialect: org.hibernate.dialect.MySQL5InnoDBDialect
show-sql: true
server:
port: 8080