ThingsBoard初始化数据库Postgres+Cassandra

本章将介绍ThingsBoard初始化数据Postgres+Cassandra，两种数据库结合使用，以及源码的编译安装。本机环境：Centos7、Docker、Postgres、Cassandra

环境安装

开发环境要求：

docker ；
Docker；
Postgres:
Cassandra

Postgres数据库的安装以及使用，可查看👇文章

https://xulushi.blog.csdn.net/article/details/136784786?spm=1001.2014.3001.5502https://xulushi.blog.csdn.net/article/details/136784786?spm=1001.2014.3001.5502

1、使用Docker创建Cassandra容器化创建

docker run -p 9042:9042 --name cassandra  -e CASSANDRA_USERNAME=cassandra -e CASSANDRA_PASSWORD=cassandra  -d cassandra:lastest

docker run ：运行容器

name ：容器到名称为cassandra

-e CASSANDRA_USERNAME=cassandra ：数据库账号

-e CASSANDRA_PASSWORD=cassandra ：数据库密码
9042:9042 ：将容器的9042端口映射到主机9042上
-d ：程序后台执行

cassandra:lastest ：cassandra最新版本号

docker logs postgres

2、使用DBeaverEE链接数据库，（你们也可以用你们自己的根据自己情况）

填入：服务器地址+端口+账号+密码

测试连接是否正常

3、将初始化数据库工程，移动到对应的目录下

4、打开application目录下的thingsboard.yml，更改datasource链接地址

localhost：修改成你们自己的地址以及数据库名称

username：Cassandra数据库用户名

password：Cassandra数据库密码

cassandra:# Thingsboard cluster namecluster_name: "${CASSANDRA_CLUSTER_NAME:Thingsboard Cluster}"# Thingsboard keyspace namekeyspace_name: "${CASSANDRA_KEYSPACE_NAME:thingsboard}"# Specify node listurl: "${CASSANDRA_URL:47.104.235.15:9042}"# Specify the local data center namelocal_datacenter: "${CASSANDRA_LOCAL_DATACENTER:datacenter1}"ssl:# Enable/disable secure connectionenabled: "${CASSANDRA_USE_SSL:false}"# Enable/disable validation of Cassandra server hostname# If enabled, the hostname of the Cassandra server must match the CN of the server certificatehostname_validation: "${CASSANDRA_SSL_HOSTNAME_VALIDATION:true}"# Set trust store for client authentication of the server (optional, uses trust store from default SSLContext if not set)trust_store: "${CASSANDRA_SSL_TRUST_STORE:}"# The password for Cassandra trust store keytrust_store_password: "${CASSANDRA_SSL_TRUST_STORE_PASSWORD:}"# Set key store for server authentication of the client (optional, uses key store from default SSLContext if not set)# A key store is only needed if the Cassandra server requires client authenticationkey_store: "${CASSANDRA_SSL_KEY_STORE:}"# The password for the Cassandra key storekey_store_password: "${CASSANDRA_SSL_KEY_STORE_PASSWORD:}"# Comma-separated list of cipher suites (optional, uses Java default cipher suites if not set)cipher_suites: "${CASSANDRA_SSL_CIPHER_SUITES:}"# Enable/disable JMXjmx: "${CASSANDRA_USE_JMX:false}"# Enable/disable metrics collection.metrics: "${CASSANDRA_USE_METRICS:false}"# NONE SNAPPY LZ4compression: "${CASSANDRA_COMPRESSION:none}"# Specify cassandra cluster initialization timeout in milliseconds (if no hosts are available during startup)init_timeout_ms: "${CASSANDRA_CLUSTER_INIT_TIMEOUT_MS:300000}"# Specify cassandra cluster initialization retry interval (if no hosts available during startup)init_retry_interval_ms: "${CASSANDRA_CLUSTER_INIT_RETRY_INTERVAL_MS:3000}"# Cassandra max local requests per connectionmax_requests_per_connection_local: "${CASSANDRA_MAX_REQUESTS_PER_CONNECTION_LOCAL:32768}"# Cassandra max remote requests per connectionmax_requests_per_connection_remote: "${CASSANDRA_MAX_REQUESTS_PER_CONNECTION_REMOTE:32768}"# Credential parameterscredentials: "${CASSANDRA_USE_CREDENTIALS:false}"# Specify your usernameusername: "${CASSANDRA_USERNAME:cassandra}"# Specify your passwordpassword: "${CASSANDRA_PASSWORD:cassandra}"# Astra DB connect https://astra.datastax.com/

将遥测数据以及最新数据存放入cassandra中，来较少DB数据库的压力，当在生产环境的情况下，如果说遥测数据未存放到cassandra中，就会给DB造成巨大的压力

# Database telemetry parameters
database:ts_max_intervals: "${DATABASE_TS_MAX_INTERVALS:700}" # Max number of DB queries generated by a single API call to fetch telemetry recordsts:type: "${DATABASE_TS_TYPE:cassandra}" # cassandra, sql, or timescale (for hybrid mode, DATABASE_TS_TYPE value should be cassandra, or timescale)ts_latest:type: "${DATABASE_TS_LATEST_TYPE:cassandra}" # cassandra, sql, or timescale (for hybrid mode, DATABASE_TS_TYPE value should be cassandra, or timescale)