mirror of https://github.com/hashicorp/consul
124 lines
7.1 KiB
Markdown
124 lines
7.1 KiB
Markdown
---
|
|
layout: commands
|
|
page_title: 'Commands: Debug'
|
|
description: >-
|
|
The `consul debug` command monitors an agent to capture a record its actions according to defined durations and intervals.
|
|
---
|
|
|
|
# Consul Debug
|
|
|
|
Command: `consul debug`
|
|
|
|
The `consul debug` command monitors a Consul agent for the specified period of
|
|
time, recording information about the agent, cluster membership, and environment to an archive
|
|
written to the current directory.
|
|
|
|
Providing support for complex issues encountered by Consul operators often
|
|
requires a large amount of debugging information to be retrieved. This command
|
|
aims to shortcut that coordination and provide a simple workflow for accessing
|
|
data about Consul agent, cluster membership, and environment to enable faster
|
|
isolation and debugging of issues.
|
|
|
|
This command requires an `operator:read` ACL token in order to retrieve the
|
|
data from the target agent, if ACLs are enabled.
|
|
|
|
If the command is interrupted, as it could be given a long duration but
|
|
require less time than expected, it will attempt to archive the current
|
|
captured data.
|
|
|
|
## Security and Privacy
|
|
|
|
By default, ACL tokens, private keys, and other sensitive material related
|
|
to Consul is sanitized and not available in this archive. However, other
|
|
information about the environment the target agent is running in is available
|
|
in plain text within the archive.
|
|
|
|
It is recommended to validate the contents of the archive and redact any
|
|
material classified as sensitive to the target environment, or use the `-capture`
|
|
flag to not retrieve it initially.
|
|
|
|
Additionally, we recommend securely transmitting this archive via encryption
|
|
or otherwise.
|
|
|
|
## Usage
|
|
|
|
`Usage: consul debug [options]`
|
|
|
|
By default, the debug command will capture an archive at the current path for
|
|
all targets for 5 minutes.
|
|
|
|
#### Command Options
|
|
|
|
- `-duration` - Optional, the total time to capture data for from the target agent. Must
|
|
be greater than the interval and longer than 10 seconds. Defaults to 5 minutes.
|
|
|
|
- `-interval` - Optional, the interval at which to capture dynamic data, such as heap
|
|
and metrics. Must be longer than 5 seconds. Defaults to 30 seconds.
|
|
|
|
- `-capture` - Optional, can be specified multiple times for each [capture target](#capture-targets)
|
|
and will only record that information in the archive.
|
|
|
|
- `-output` - Optional, the full path of where to write the directory of data and
|
|
resulting archive. Defaults to the current directory.
|
|
|
|
- `-archive` - Optional, if the tool show archive the directory of data into a
|
|
compressed tar file. Defaults to true.
|
|
|
|
#### API Options
|
|
|
|
@include 'http_api_options_client.mdx'
|
|
|
|
## Capture Targets
|
|
|
|
The `-capture` flag can be specified multiple times to capture specific
|
|
information when `debug` is running. By default, it captures all information.
|
|
|
|
| Target | Description |
|
|
| --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
|
| `agent` | Version and configuration information about the agent. |
|
|
| `host` | Information about resources on the host running the target agent such as CPU, memory, and disk. |
|
|
| `members` | A list of all the WAN and LAN members in the cluster. |
|
|
| `metrics` | Metrics from the in-memory metrics endpoint in the target, captured at the interval. |
|
|
| `logs` | `TRACE` level logs for the target agent, captured for the duration. |
|
|
| `pprof` | Golang heap, CPU, goroutine, and trace profiling. CPU and traces are captured for `duration` in a single file while heap and goroutine are separate snapshots for each `interval`. This information is not retrieved unless [`enable_debug`](/consul/docs/agent/config/config-files#enable_debug) is set to `true` on the target agent or ACLs are enable and an ACL token with `operator:read` is provided. |
|
|
|
|
## Examples
|
|
|
|
This command can be run from any host with the Consul binary, but requires
|
|
network access to the target agent in order to retrieve data. Once retrieved,
|
|
the data is written to the the specified path (defaulting to the current
|
|
directory) on the host where the command runs.
|
|
|
|
By default the command will capture all available data from the default
|
|
agent address on loopback for 2 minutes at 30 second intervals.
|
|
|
|
```shell-session
|
|
$ consul debug
|
|
...
|
|
```
|
|
|
|
In this example, the archive is collected from a different agent on the
|
|
network using the standard Consul CLI flag to change the API address.
|
|
|
|
```shell-session
|
|
$ consul debug -http-addr=10.0.1.10:8500
|
|
...
|
|
```
|
|
|
|
The capture flag can be specified to only record a subset of data
|
|
about the agent and environment.
|
|
|
|
```shell-session
|
|
$ consul debug -capture agent -capture host -capture logs
|
|
...
|
|
```
|
|
|
|
The duration of the command and interval of capturing dynamic
|
|
information (such as metrics) can be specified with the `-interval`
|
|
and `-duration` flags.
|
|
|
|
```shell-session
|
|
$ consul debug -interval=15s -duration=1m
|
|
...
|
|
```
|