VictoriaMetrics/docs/VictoriaLogs/querying/vlogscli.md

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vlogsqcli is an interactive command-line tool for querying VictoriaLogs. This tool can be obtained from the linked release pages at the changelog or from docker images.

By default vlogscli sends queries to http://localhost:8429/select/logsql/query. The url to query can be changed via -datasource.url command-line flag. For example, the following command instructs vlogsql sending queries to https://victoria-logs.some-domain.com/select/logsql/query:

./vlogsql -datasource.url='https://victoria-logs.some-domain.com/select/logsql/query'

If some HTTP request headers must be passed to the querying API, then set -header command-line flag. For example, the following command starts vlogsql, which queries (AccountID=123, ProjectID=456) tenant:

./vlogsql -header='AccountID: 123' -header='ProjectID: 456'

After the start vlogsql provides a prompt for writing LogsQL queries. The query can be multi-line. The is sent to VictoriaLogs as soon as it contains ; at the end or if a blank line follows the query. For example:

;> _time:1y | count();
executing [_time:1y | stats count(*) as "count(*)"]...
{
  "count(*)": "1923019991"
}
duration: 0.688s

Query execution can be interrupted at any time by pressing Ctrl+C.

Type q, quit or exit and the press Enter for exit from vlogsql.

If the query response exceeds vertical screen space, the vlogsql pipes query response to less utility, so you can scroll the response as needed. This allows executing queries, which potentially may return billions of rows, without any problems at both VictoriaMetrics and vlogsql sides, thanks to the way how less interacts with /select/logsql/query:

• less reads the response when needed, e.g. when you scroll it down. less pauses reading the response when you stop scrolling. VictoriaLogs pauses processing the query when less stops reading the response, and automatically resumes processing the response when less continues reading it.
• less closes the response stream after exit from scroll mode (e.g. by typing q). VictoriaLogs stops query processing and frees up all the associated resources after the response stream is closed.

See also less docs and command-line integration docs for VictoriaMetrics.

Query history

vlogsql supports query history - press up and down keys for navigating the history. By default the history is stored in the vlogsql-history file at the directory where vlogsql runs, so the history is available between vlogsql runs. The path to the file can be changed via -historyFile command-line flag.

Quick tip: type some text and then press Ctrl+R for searching queries with the given text in the history. Press Ctrl+R multiple times for searching other matching queries in the history. Press Enter when the needed query is found in order to execute it. Press Ctrl+C for exit from the search history mode. See also other available shortcuts.