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CENTRALIZED CONFIGURATION USING CONSUL AND SPRING CLOUD

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CENTRALIZED CONFIGURATION EKO KURNIAWAN KHANNEDY ▸ Principal R&D Engineer at Blibli.com ▸ Part of R&D Team at Blibli.com ▸ eko.k.khannedy@gdn-commerce.com

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CENTRALIZED CONFIGURATION AGENDA ▸ Consul ▸ Spring Cloud ▸ Demo

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CONSUL CENTRALIZED CONFIGURATION

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CENTRALIZED CONFIGURATION WHAT IS CONSUL? ▸ Service Discovery (via DNS or HTTP) ▸ Failure Detection (health checking) ▸ Key-Value Storage (for dynamic configuration) ▸ Multi Datacenter

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CENTRALIZED CONFIGURATION CONSUL CLUSTER ARCHITECTURE ▸ Datacenter ▸ Agent, a the long running daemon on every member of the Consul cluster ▸ Server, an agent with an expanded set of responsibilities ▸ Client, an agent that forwards all RPCs to a server

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CENTRALIZED CONFIGURATION SETUP CONSUL CLUSTER IP Address Role 192.0.0.1 Bootstrap Consul Server 192.0.0.2 Consul Server 192.0.0.3 Consul Server

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CENTRALIZED CONFIGURATION SETUP CONSUL SERVER 1 (BOOTSTRAP) {
 “bootstrap”: true,
 “server”: true,
 “datacenter”: “blibli",
 “data_dir”: “/opt/var/consul”,
 “log_level”: “INFO”,
 “bind_addr” : “192.0.0.1”,
 “client_addr” : “192.0.0.1”
 }

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CENTRALIZED CONFIGURATION SETUP CONSUL SERVER 2 {
 “bootstrap”: false,
 “server”: true,
 “datacenter”: “blibli",
 “data_dir”: “/opt/var/consul”,
 “log_level”: “INFO”,
 “bind_addr” : “192.0.0.2”,
 “client_addr” : “192.0.0.2”,
 “start_join” : [ “192.0.0.1”, “192.0.0.3” ]
 }

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CENTRALIZED CONFIGURATION SETUP CONSUL SERVER 3 {
 “bootstrap”: false,
 “server”: true,
 “datacenter”: “blibli",
 “data_dir”: “/opt/var/consul”,
 “log_level”: “INFO”,
 “bind_addr” : “192.0.0.3”,
 “client_addr” : “192.0.0.3”,
 “start_join” : [ “192.0.0.1”, “192.0.0.2” ]
 }

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CENTRALIZED CONFIGURATION SETUP CONSUL CLIENT {
 “server”: false,
 “datacenter”: “blibli",
 “data_dir”: “/opt/var/consul”,
 “log_level”: “INFO”,
 “bind_addr” : “192.0.1.1”,
 “client_addr” : “192.0.1.1”,
 “start_join” : [ “192.0.0.1”, “192.0.0.2”, “192.0.0.3” ]
 }

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CENTRALIZED CONFIGURATION START CONSUL AGENT consul agent -ui -config-dir /opt/consul/config ▸ All consul configuration saved as json file in a directory. ▸ Consul automatically read all json file in config directory.

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CENTRALIZED CONFIGURATION

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SPRING CLOUD CENTRALIZED CONFIGURATION

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CENTRALIZED CONFIGURATION ADD CONSUL DEPENDENCY org.springframework.cloud spring-cloud-starter-consul-config

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CENTRALIZED CONFIGURATION ADD CONSUL CONFIGURATION (BOOTSTRAP.PROPERTIES) spring.application.name=blibli-demo spring.cloud.consul.config.fail-fast=true spring.cloud.consul.host=localhost spring.cloud.consul.port=8500

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DEMO

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CENTRALIZED CONFIGURATION REFERENCES ▸ https://www.consul.io/ ▸ https://cloud.spring.io/spring-cloud-config/ ▸ https://cloud.spring.io/spring-cloud-consul/ ▸ https://spring.io/guides/gs/centralized-configuration/