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129 lines
5.7 KiB
Markdown
129 lines
5.7 KiB
Markdown
---
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weight:
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title: vlogscli
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disableToc: true
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menu:
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docs:
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parent: "victorialogs-querying"
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weight: 1
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---
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`vlogsqcli` is an interactive command-line tool for querying [VictoriaLogs](https://docs.victoriametrics.com/victorialogs/).
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This tool can be obtained from the linked release pages at the [changelog](https://docs.victoriametrics.com/victorialogs/changelog/)
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or from [docker images](https://hub.docker.com/r/victoriametrics/vlogscli/tags):
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### Running `vlogscli` from release binary
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```sh
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curl -L -O https://github.com/VictoriaMetrics/VictoriaMetrics/releases/download/v0.34.0-victorialogs/vlogscli-linux-amd64-v0.34.0-victorialogs.tar.gz
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tar xzf vlogscli-linux-amd64-v0.34.0-victorialogs.tar.gz
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./vlogscli-prod
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```
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### Running `vlogscli` from Docker image
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```sh
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docker run --rm -it docker.io/victoriametrics/vlogscli:v0.34.0-victorialogs
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```
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## Configuration
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By default `vlogscli` sends queries to [`http://localhost:8429/select/logsql/query`](https://docs.victoriametrics.com/victorialogs/querying/#querying-logs).
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The url to query can be changed via `-datasource.url` command-line flag. For example, the following command instructs
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`vlogsql` sending queries to `https://victoria-logs.some-domain.com/select/logsql/query`:
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```sh
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./vlogsql -datasource.url='https://victoria-logs.some-domain.com/select/logsql/query'
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```
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If some HTTP request headers must be passed to the querying API, then set `-header` command-line flag.
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For example, the following command starts `vlogsql`,
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which queries `(AccountID=123, ProjectID=456)` [tenant](https://docs.victoriametrics.com/victorialogs/#multitenancy):
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```sh
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./vlogsql -header='AccountID: 123' -header='ProjectID: 456'
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```
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`AccountID` and `ProjectID` values can be also set via `-accountID` and `-projectID` command-line flags:
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```sh
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./vlogsql -accountID=123 -projectID=456
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```
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## Querying
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After the start `vlogsql` provides a prompt for writing [LogsQL](https://docs.victoriametrics.com/victorialogs/logsql/) queries.
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The query can be multi-line. It is sent to VictoriaLogs as soon as it contains `;` at the end or if a blank line follows the query.
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For example:
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```sh
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;> _time:1y | count();
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executing [_time:1y | stats count(*) as "count(*)"]...
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{
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"count(*)": "1923019991"
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}
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duration: 0.688s
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```
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Query execution can be interrupted at any time by pressing `Ctrl+C`.
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Type `q` and then press `Enter` for exit from `vlogsql` (if you want to search for `q` [word](https://docs.victoriametrics.com/victorialogs/logsql/#word),
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then just wrap it into quotes: `"q"` or `'q'`).
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If the query response exceeds vertical screen space, `vlogsql` pipes query response to `less` utility,
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so you can scroll the response as needed. This allows executing queries, which potentially
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may return billions of rows, without any problems at both VictoriaMetrics and `vlogsql` sides,
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thanks to the way how `less` interacts with [`/select/logsql/query`](https://docs.victoriametrics.com/victorialogs/querying/#querying-logs):
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- `less` reads the response when needed, e.g. when you scroll it down.
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`less` pauses reading the response when you stop scrolling. VictoriaLogs pauses processing the query
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when `less` stops reading the response, and automatically resumes processing the response
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when `less` continues reading it.
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- `less` closes the response stream after exit from scroll mode (e.g. by typing `q`).
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VictoriaLogs stops query processing and frees up all the associated resources
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after the response stream is closed.
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See also [`less` docs](https://man7.org/linux/man-pages/man1/less.1.html) and
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[command-line integration docs for VictoriaMetrics](https://docs.victoriametrics.com/victorialogs/querying/#command-line).
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## Live tailing
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`vlogsql` enters live tailing mode when the query is prepended with `\tail ` command. For example:
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```
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;> \tail {kubernetes_container_name="vmagent"};
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```
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By default `vlogscli` derives [the URL for live tailing](https://docs.victoriametrics.com/victorialogs/querying/#live-tailing) from the `-datasource.url` command-line flag
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by replacing `/query` with `/tail` at the end of `-datasource.url`. The URL for live tailing can be specified explicitly via `-tail.url` command-line flag.
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## Query history
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`vlogsql` supports query history - press `up` and `down` keys for navigating the history.
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By default the history is stored in the `vlogsql-history` file at the directory where `vlogsql` runs,
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so the history is available between `vlogsql` runs.
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The path to the file can be changed via `-historyFile` command-line flag.
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Quick tip: type some text and then press `Ctrl+R` for searching queries with the given text in the history.
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Press `Ctrl+R` multiple times for searching other matching queries in the history.
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Press `Enter` when the needed query is found in order to execute it.
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Press `Ctrl+C` for exit from the `search history` mode.
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See also [other available shortcuts](https://github.com/chzyer/readline/blob/f533ef1caae91a1fcc90875ff9a5a030f0237c6a/doc/shortcut.md).
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## Output modes
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By default `vlogscli` displays query results as prettified JSON object with every field on a separate line.
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Fields in every JSON object are sorted in alphabetical order. This simplifies locating the needed fields.
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`vlogscli` supports the following output modes:
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* A single JSON line per every result. Type `\s` and press `enter` for this mode.
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* Multline JSON per every result. Type `\m` and press `enter` for this mode.
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* Compact output. Type `\c` and press `enter` for this mode.
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This mode shows field values as is if the response contains a single field
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(for example if [`fields _msg` pipe](https://docs.victoriametrics.com/victorialogs/logsql/#fields-pipe) is used)
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plus optional [`_time` field](https://docs.victoriametrics.com/victorialogs/keyconcepts/#time-field).
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* [Logfmt output](https://brandur.org/logfmt). Type `\logfmt` and press `enter` for this mode.
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