OpenTSDB installation and use

OpenTSDB (Open Time Series Database) is a powerful distributed temporal database used to store and analyze massive amounts of temporal data. It is built based on Hadoop and HBase and can quickly process large-scale temporal data, suitable for storing and querying various monitoring, logging, alarm and other temporal data. The following is the installation process of OpenTSDB: 1. Install Hadoop and HBase OpenTSDB relies on Hadoop and HBase, so they need to be installed first. You can install according to the official document's instructions. 2. Download OpenTSDB Accessing the GitHub page of OpenTSDB（ https://github.com/OpenTSDB/opentsdb ）Download and extract the latest version of the source code. 3. Compile and Build OpenTSDB In the root directory of the OpenTSDB source code, execute the following command to compile and build OpenTSDB: shell ./build.sh 4. Configure OpenTSDB In the root directory of the OpenTSDB source code, there is an example configuration file called opentsdbconf. You can copy the file and make corresponding modifications as needed: shell cp opentsdb.conf.example opentsdb.conf 5. Start HBase Execute the following command to start HBase: shell <hbase-installation-dir>/bin/start-hbase.sh 6. Create HBase table Create an HBase table using the command line tool provided by OpenTSDB: shell ./src/create_table.sh 7. Start OpenTSDB In the root directory of the OpenTSDB source code, execute the following command to start the OpenTSDB service: shell ./build/tsdb tsd --port=4242 --staticroot=build/staticroot --cachedir=/tmp --auto-metric At this point, OpenTSDB has been successfully installed and started. The following is the implementation of database creation and data addition, deletion, modification, and query: 1. Create a database The OpenTSDB database is dynamically created by writing corresponding data points. Data points refer to structures that contain timestamps, metric names, and corresponding values. By sending HTTP requests to write data points to OpenTSDB, a new database can be created. 2. Increase of data To add data to the database in OpenTSDB, you can send an HTTP request to send the data point as a payload to the write gateway of OpenTSDB ('/api/put'). The format of data points is as follows: json { "metric": "cpu_usage", "timestamp": 1620573640, "value": 75.6, "tags": { "host": "server1", "region": "us-west" } } 3. Data deletion To delete data in OpenTSDB, you can send an HTTP request, which sends the deletion condition as a payload to the OpenTSDB deletion gateway ('/api/query'). The deletion criteria can be specified based on time range, indicator name, and label. 4. Data modification The data in OpenTSDB is immutable and cannot be directly modified. If data needs to be modified, the original data needs to be deleted first, and then new data needs to be added. 5. Data Query To query data in OpenTSDB, you can send an HTTP request and send the query criteria as payloads to the OpenTSDB query gateway ('/api/query'). The query criteria can be specified based on time range, indicator name, and label. The query result will return a JSON array containing qualified data points. The above is the installation process of OpenTSDB, as well as the implementation of database creation and data addition, deletion, and modification. Through OpenTSDB, temporal data can be efficiently stored and queried, providing strong support for temporal data analysis.