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Assorted log config documentation
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Summary of changes:

- remove the deprecation notice about the default log file config.
  We've decided not to deprecate it after all.
- document the new TELEMETRY channel.
- document the new HTTP sink.
- document the new channel-file mappings.
- fix the missing `auditable` flag in the 21.1/21.2 default config.
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knz committed Sep 20, 2021
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6 changes: 2 additions & 4 deletions v21.1/configure-logs.md
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Expand Up @@ -447,10 +447,6 @@ When `capture-stray-errors` is disabled, [`redactable`](#redact-logs) cannot be

The YAML payload below represents the default logging behavior of [`cockroach start`](cockroach-start.html) and [`cockroach start-single-node`](cockroach-start-single-node.html). To retain backward compatibility with v20.2 and earlier, these settings match the [log filenames used in previous versions](logging-overview.html#changes-to-logging-system).

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These `file-groups` defaults will be removed in v21.2.
{{site.data.alerts.end}}

~~~ yaml
file-defaults:
max-file-size: 10MiB
Expand All @@ -477,8 +473,10 @@ sinks:
channels: [STORAGE]
sql-audit:
channels: [SENSITIVE_ACCESS]
auditable: true
sql-auth:
channels: [SESSIONS]
auditable: true
sql-exec:
channels: [SQL_EXEC]
sql-slow:
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6 changes: 1 addition & 5 deletions v21.1/logging-overview.md
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Expand Up @@ -50,7 +50,7 @@ Logging channels are analogous to [logging facilities in Syslog](https://en.wiki

Prior to v21.1, logs were separated into a general CockroachDB log and secondary SQL and storage logs. These were output to correspondingly named log files.

The events collected by those logs are now directed into the following [logging channels](#logging-channels):
The events collected by [logging channels](#logging-channels) are now redirected to file sinks as follows:

| Filename (legacy) | Description | Channel |
|---------------------------|-------------------------|--------------------|
Expand All @@ -61,10 +61,6 @@ The events collected by those logs are now directed into the following [logging
| `cockroach-auth.log` | SQL authentication log | `SESSIONS` |
| `cockroach-sql-slow.log` | Slow query log | `SQL_PERF` |

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In v21.1, the [default logging configuration](configure-logs.html#default-logging-configuration) keeps the legacy filenames for these channels. Starting in v21.2, you will need to explicitly map the channels to the legacy filenames in order to preserve this configuration. For details on this, see [Configure Logs](configure-logs.html#configure-log-sinks).
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Notable events that were previously collected in the general CockroachDB log are now directed into several new logging channels:

- `OPS`
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160 changes: 136 additions & 24 deletions v21.2/configure-logs.md
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Expand Up @@ -13,10 +13,6 @@ This page describes how to configure CockroachDB logs with the [`--log` or `log-

For examples of how these settings can be used in practice, see [Logging Use Cases](logging-use-cases.html).

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The logging flags previously used with `cockroach` commands are now deprecated. Instead, use the YAML definitions as described below. The [default logging configuration](#default-logging-configuration) uses YAML settings that are backward-compatible with the log files used in v20.2 and earlier.
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## Flag

To configure the logging behavior of a `cockroach` command, include one of these flags with the command:
Expand Down Expand Up @@ -60,7 +56,8 @@ file-defaults: ... # defaults inherited by file sinks
fluent-defaults: ... # defaults inherited by network sinks
sinks:
file-groups: ... # file sink definitions
fluent-servers: ... # network sink definitions
fluent-servers: ... # Fluent sink definitions
http-servers: ... # HTTP sink definitions
stderr: ... # stderr sink definitions
capture-stray-errors: ... # parameters for the stray error capture system
~~~
Expand Down Expand Up @@ -91,6 +88,10 @@ sinks:
{server name}:
channels: {channels}
...
http-servers:
{server name}:
channels: {channels}
...
stderr:
channels: {channels}
...
Expand Down Expand Up @@ -170,7 +171,7 @@ cockroach-health.log
The files generated for a group named `default` are named after the pattern `cockroach.{metadata}.log`.
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### Output to network
### Output to Fluent-compatible network collectors
CockroachDB can send logs over the network to a [Fluentd](https://www.fluentd.org/)-compatible log collector (e.g., [Elasticsearch](https://www.elastic.co/elastic-stack), [Splunk](https://www.splunk.com/)). `fluent-servers` specifies the channels that output to a server, along with its configuration details. For example:
Expand Down Expand Up @@ -201,6 +202,44 @@ A Fluentd sink buffers at most one log entry and retries sending the event at mo

For an example network logging configuration, see [Logging use cases](logging-use-cases.html#network-logging).

### Output to HTTP network collectors

CockroachDB can send logs over the network to a HTTP server. `http-servers` specifies the channels that output to a server, along with its configuration details. For example:

~~~ yaml
file-defaults: ...
fluent-defaults: ...
sinks:
http-servers:
health:
channels: [HEALTH]
address: 127.0.0.1:5170
method: POST
unsafe-tls: false
timeout: 2s
disable-keep-alives: false
...
~~~

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A network sink can be listed more than once with different `address` values. This routes the same logs to different HTTP servers.
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Along with the [common sink parameters](#common-sink-parameters), each HTTP server accepts the following parameters:

| Parameter | Description |
|-----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `channels` | List of channels that output to this sink. Use a YAML array or string of [channel names](logging-overview.html#logging-channels), `ALL` to include all channels, or `ALL EXCEPT {channels}` to include all channels except the specified channel names.<br><br>For more details on acceptable syntax, see [Logging channel selection](#logging-channel-selection). |
| `address` | Network address and port of the log collector. |
| `method` | HTTP method to use. Can be `GET` or `POST`.<br><br>**Default:** `POST` |
| `unsafe-tls` | Whether to bypass TLS server validation.<br><br>**Default:** `false` |
| `timeout` | Timeout before requests are abandoned.<br><br>**Default:** `0` (no timeout) |
| `disable-keep-alives` | Whether to disallow reuse of the server connection across requests.<br><br>**Default:** `false` (reuses connections) |

A HTTP sink buffers at most one log entry and retries sending the event at most one time if a network error is encountered. This is just sufficient to tolerate a restart of the HTTP collector after a configuration change under light logging activity. If the server is unavailable for too long, or if more than one error is encountered, an error is reported to the process's standard error output with a copy of the logging event, and the logging event is dropped.
For an example network logging configuration, see [Logging use cases](logging-use-cases.html#network-logging).
### Output to `stderr`
CockroachDB can output messages to the [standard error stream (`stderr`)](https://en.wikipedia.org/wiki/Standard_streams#Standard_error_(stderr)), which prints them to the machine's terminal but does not store them. `stderr` specifies the channels that output to the stream. For example:
Expand Down Expand Up @@ -236,13 +275,23 @@ Each sink can select multiple channels. The names of selected channels can be sp

~~~ yaml
# Select just these two channels. Space is important.
# This uses the severity filter set by the separate 'filter' attribute
# in the sink configuration.
channels: [OPS, HEALTH]

# Selection is case-insensitive.
# Select PERF at severity INFO, and HEALTH and OPS at severity WARNING.
# The 'filter' attribute in the sink configuration is ignored.
channels: {INFO: [PERF], WARNING: [HEALTH, OPS]}

# The brackets are optional when selecting a single channel.
channels: OPS
channels: {INFO: PERF}

# The selection is case-insensitive.
channels: [ops, HeAlTh]

# Same configuration, as a YAML string.
# Avoid space around commas when using the YAML inline format.
# Same configuration, as a YAML string. Avoid space around comma
# if using the YAML "inline" format.
channels: OPS,HEALTH

# Same configuration, as a quoted string.
Expand All @@ -252,6 +301,13 @@ channels: 'OPS, HEALTH'
channels:
- OPS
- HEALTH

channels:
INFO:
- PERF
WARNING:
- OPS
- HEALTH
~~~

To select all channels, using the `all` keyword:
Expand Down Expand Up @@ -320,9 +376,9 @@ file-defaults:
`format` refers to the envelope of the log message, which contains the event metadata. This is separate from the event payload, which corresponds to its [event type](eventlog.html).
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### Set network defaults
### Set Fluent defaults

Defaults for network sinks are set in `fluent-defaults`, which accepts all [common sink parameters](#common-sink-parameters).
Defaults for Fluent-compatible network sinks are set in `fluent-defaults`, which accepts all [common sink parameters](#common-sink-parameters).

Note that the [server parameters](#output-to-network) `address` and `net` are *not* specified in `fluent-defaults`:

Expand All @@ -342,14 +398,42 @@ fluent-defaults:
`format` refers to the envelope of the log message. This is separate from the event payload, which is structured according to [event type](eventlog.html).
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### Set HTTP defaults

Defaults for HTTP sinks are set in `http-defaults`, which accepts all [common sink parameters](#common-sink-parameters).

Note that the [server parameters](#output-to-network) `address` and `method` are *not* specified in `fluent-defaults`:

- `address` must be specified for each sink under `http-servers`.
- `method` is not required and defaults to `POST`.

#### Network logging format

The default message format for HTTP output is [`json-compact`](log-formats.html#format-json-compact). Each log message is structured as a JSON payload that can be read programmatically. For details, see [Log formats](log-formats.html#format-json-fluent-compact).

~~~ yaml
http-defaults:
format: json
~~~

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`format` refers to the envelope of the log message. This is separate from the event payload, which is structured according to [event type](eventlog.html).
{{site.data.alerts.end}}

### Set logging levels

Log messages are associated with a [severity level](logging.html#logging-levels-severities) when they are generated. Each logging sink is configured to output messages that meet a minimum severity level, specified with `filter`. Messages with severity levels below the `filter` threshold do not enter logging channels and are discarded.
Log messages are associated with a [severity level](logging.html#logging-levels-severities) when they are generated.

Each logging sink accepts messages from each logging channel at a minimum severity level.
This minimum severity level can be specified per channel, or by default using the `filter` attribute.

Messages with severity levels below the configured threshold do not enter logging channels and are discarded.

The [default configuration](#default-logging-configuration) uses the following severity levels for [`cockroach start`](cockroach-start.html) and [`cockroach start-single-node`](cockroach-start-single-node.html):

- `file-defaults` and `fluent-defaults` each use `filter: INFO`. Since `INFO` is the lowest severity level, file and network sinks will emit all log messages.
- `stderr` uses `filter: NONE` and does not emit log messages.
- The `default` file sink includes a copy of the events from all the non-`DEV`, non-`OPS` channels at severity `WARNING` or higher.

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All other `cockroach` commands use `filter: WARNING` and log to `stderr` by default, with these exceptions:
Expand All @@ -358,16 +442,26 @@ All other `cockroach` commands use `filter: WARNING` and log to `stderr` by defa
- [`cockroach demo`](cockroach-demo.html#logging) uses `filter: NONE` (discards all log messages).
{{site.data.alerts.end}}

You can also override the `file-defaults` and `fluent-defaults` severity levels on a per-sink basis. For example, use `filter: NONE` to disable logging for certain channels:
You can also override the `file-defaults` and `fluent-defaults` severity levels on a per-sink basis.

For example, this includes `DEV` at severity `INFO`, and `OPS` at severity `ERROR`:

~~~ yaml
file-defaults: ...
fluent-defaults: ...
sinks:
file-groups:
dev:
channels: [DEV]
filter: NONE
channels: {INFO: DEV, ERROR: OPS}
~~~

The `filter` attribute is used when `channels` does not specify a severity threshold.
For example, the following includes `DEV` at severity `WARNING`:

~~~ yaml
sinks:
file-groups:
dev:
channels: DEV
filter: WARNING
~~~

### Redact logs
Expand Down Expand Up @@ -414,8 +508,6 @@ sinks:
channels: [DEV]
dir: /custom/dir/path/
...
fluent-servers:
...
~~~
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Expand Down Expand Up @@ -447,10 +539,6 @@ When `capture-stray-errors` is disabled, [`redactable`](#redact-logs) cannot be
The YAML payload below represents the default logging behavior of [`cockroach start`](cockroach-start.html) and [`cockroach start-single-node`](cockroach-start-single-node.html). To retain backward compatibility with v20.2 and earlier, these settings match the [log filenames used in previous versions](logging-overview.html#changes-to-logging-system).
{{site.data.alerts.callout_danger}}
These `file-groups` defaults will be removed in v21.2.
{{site.data.alerts.end}}

~~~ yaml
file-defaults:
max-file-size: 10MiB
Expand All @@ -469,22 +557,46 @@ fluent-defaults:
redactable: true
exit-on-error: false
auditable: false
http-defaults:
method: POST
unsafe-tls: false
timeout: 0s
disable-keep-alives: false
filter: INFO
format: json-compact
redact: false
redactable: true
exit-on-error: false
auditable: false
sinks:
file-groups:
default:
channels: [DEV, OPS, HEALTH, SQL_SCHEMA, USER_ADMIN, PRIVILEGES]
channels:
INFO: [DEV, OPS]
WARNING: all except [DEV, OPS]
health:
channels: [HEALTH]
pebble:
channels: [STORAGE]
security:
channels: [PRIVILEGES, USER_ADMIN]
auditable: true
sql-audit:
channels: [SENSITIVE_ACCESS]
auditable: true
sql-auth:
channels: [SESSIONS]
auditable: true
sql-exec:
channels: [SQL_EXEC]
sql-slow:
channels: [SQL_PERF]
sql-slow-internal-only:
channels: [SQL_INTERNAL_PERF]
telemetry:
channels: [TELEMETRY]
max-file-size: 100KiB
max-group-size: 1.0MiB
stderr:
channels: all
filter: NONE
Expand Down
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