Node.js package configuration options
The following list includes all configuration options with the name of the environment variable and the name of the key in the configuration file.
For more information on how to configure AppSignal with a configuration file or system environment variables, see our Configuration topic.
Available options
- Required options
- Options
- additionalInstrumentations
- bindAddress
- caFilePath
- cpuCount
- debug
- disableDefaultInstrumentations
- dnsServers
- enableHostMetrics
- enableMinutelyProbes
- enableNginxMetrics
- enableOpentelemetryHttp
- enableStatsd
- filesWorldAccessible
- filterParameters
- filterSessionData
- hostname
- hostRole
- httpProxy
- ignoreActions
- ignoreErrors
- ignoreLogs
- ignoreNamespaces
- log
- logLevel
- logPath
- opentelemetry_port
- requestHeaders
- revision
- runningInContainer
- sendEnvironmentMetadata
- sendParams
- sendSessionData
- statsdPort
- workingDirectoryPath
active
Config file key | active |
---|---|
System environment key | APPSIGNAL_ACTIVE |
Required | yes |
Type | Boolean (true / false ) |
Default value | false |
Description
Configure AppSignal to be active or not for a given environment. Most commonly used in the file configuration per environment.
environment
Config file key | environment |
---|---|
System environment key | APPSIGNAL_APP_ENV |
Required | yes |
Type | String |
Default value |
|
Description
The environment of the app to be reported to AppSignal.
name
Config file key | name |
---|---|
System environment key | APPSIGNAL_APP_NAME |
Required | yes |
Type | String |
Default value | nil |
Description
Name of your application as it should be displayed on AppSignal.com.
pushApiKey
Config file key | pushApiKey |
---|---|
System environment key | APPSIGNAL_PUSH_API_KEY |
Required | yes |
Type | String |
Default value | nil (This is unset by default) |
Available since version | 2.2.5 |
|
Description
The organization-level authentication key to authenticate with our Push API.
Read more about the AppSignal Push API key.
additionalInstrumentations
Config file key | additionalInstrumentations |
---|---|
Required | no |
Type | list(String) |
Default value | [] |
Available since version | 3.0.0 |
Description
List of additional OpenTelemetry instrumentations to use with AppSignal, via third-party libraries or your own integrations.
bindAddress
Config file key | bindAddress |
---|---|
System environment key | APPSIGNAL_BIND_ADDRESS |
Required | no |
Type | String |
Default value | 127.0.0.1 |
Available since version | 3.0.15 |
Description
A valid IPv4 address the AppSignal agent uses as a binding for its TCP and UDP servers. Use a specific address if you only want the agent to listen to requests made to that address. Set this option to 0.0.0.0
to allow to receive requests from hosts using any IP address. By default it only listens to requests made on the same host. This option is applied to all the agent servers (StatsD, OpenTelemetry and NGINX).
caFilePath
Config file key | caFilePath |
---|---|
System environment key | APPSIGNAL_CA_FILE_PATH |
Required | no |
Type | String |
Default value | Packaged cacert.pem file path. |
Description
- Use this option to point to another certificate file if there's a problem connecting to our API.
cpuCount
Config file key | cpuCount |
---|---|
System environment key | APPSIGNAL_CPU_COUNT |
Required | no |
Type | Float |
Default value | undefined |
Available since version | 3.3.2 |
Description
The available CPU capacity of the host, in number of CPUs. This is used to calculate the CPU usage percentage in the host metrics. If not set, the agent will attempt to automatically detect this from cgroups.
debug
Config file key | debug |
---|---|
System environment key | APPSIGNAL_DEBUG |
Required | no |
Type | Boolean (true / false ) |
Default value | false |
Available since version | 1.0.0 |
|
Description
Enable debug logging, this is usually only needed on request from support. With this option enabled AppSignal will log a lot more information about decisions that are made during metrics collection and when data is sent to AppSignal.com servers.
Enabling debug logging could have a slight impact on the disk usage and IO, especially on high-traffic sites. CPU overhead is minimal with the debug option enabled.
disableDefaultInstrumentations
Config file key | disableDefaultInstrumentations |
---|---|
System environment key | APPSIGNAL_DISABLE_DEFAULT_INSTRUMENTATIONS |
Required | no |
Type | list(String) or Boolean (true / false ) |
Default value | false |
Available since version | 3.0.0 |
Description
Allows you to disable the automatic instrumentation of default integrations:
- @appsignal/opentelemetry-instrumentation-bullmq
- @opentelemetry/instrumentation-amqplib
- @opentelemetry/instrumentation-express
- @opentelemetry/instrumentation-fastify
- @opentelemetry/instrumentation-graphql
- @opentelemetry/instrumentation-http
- @opentelemetry/instrumentation-ioredis
- @opentelemetry/instrumentation-knex
- @opentelemetry/instrumentation-koa
- @opentelemetry/instrumentation-mongodb
- @opentelemetry/instrumentation-mongoose
- @opentelemetry/instrumentation-mysql2
- @opentelemetry/instrumentation-mysql
- @opentelemetry/instrumentation-nestjs-core
- @opentelemetry/instrumentation-pg
- @opentelemetry/instrumentation-redis
- @opentelemetry/instrumentation-redis-4
- @opentelemetry/instrumentation-restify
- @opentelemetry/instrumentation-undici
- @prisma/instrumentation
To disable all instrumentations, set the value to true
.
dnsServers
Config file key | dnsServers |
---|---|
System environment key | APPSIGNAL_DNS_SERVERS |
Required | no |
Type | list(String) |
Default value | [] |
Description
Configure DNS servers for the AppSignal agent to use.
# In the host environment export APPSIGNAL_DNS_SERVERS="8.8.8.8,8.8.4.4"
If you're affected by our DNS timeouts, try setting a DNS server manually using this option that doesn't use more than 4 dots in the server name.
- Acceptable values:
8.8.8.8
,my.custom.local.server
. - Not acceptable values:
foo
,my.awesome.custom.local.dns.server
.
If the DNS server cannot be reached the agent will fall back on the host's DNS configuration and output a message in the appsignal.log
file: A problem occurred while setting DNS servers
.
enableHostMetrics
Config file key | enableHostMetrics |
---|---|
System environment key | APPSIGNAL_ENABLE_HOST_METRICS |
Required | no |
Type | Boolean (true / false ) |
Default value | `true / detected by system` |
Description
Set this option to false
to disable host metrics collection.
On Heroku and Dokku host metrics are disabled by default. This is done because these systems will report inaccurate metrics from within the containers. Host metrics collection on these systems cannot be enabled. For Heroku, use the Heroku log drain instead.
enableMinutelyProbes
Config file key | enableMinutelyProbes |
---|---|
System environment key | APPSIGNAL_ENABLE_MINUTELY_PROBES |
Required | no |
Type | Boolean (true / false ) |
Default value | true |
Available since version | 0.4.0 |
|
Description
Enables the minutely probes system.
enableNginxMetrics
Config file key | enableNginxMetrics |
---|---|
System environment key | APPSIGNAL_ENABLE_NGINX_METRICS |
Required | no |
Type | Boolean (true / false ) |
Default value | false |
Available since version | 3.0.8 |
Description
Set to true
to enable the NGINX metrics server. See the NGINX metrics documentation for details.
When enabled, the AppSignal agent will listen to a localhost
-bound server on port 27649. If you're running several AppSignal-instrumented applications in the same server, this configuration option can only be enabled in one of them.
enableOpentelemetryHttp
Config file key | enableOpentelemetryHttp |
---|---|
System environment key | APPSIGNAL_ENABLE_OPENTELEMETRY_HTTP |
Required | no |
Type | Boolean (true / false ) |
Default value | true |
Available since version | 3.1.0 |
Description
Set this option to true
to enable the OpenTelemetry HTTP server.
When enabled, the AppSignal agent will listen to a localhost
-bound server on port 8099. If you're running several AppSignal-instrumented applications in the same server, this configuration option can only be enabled in one of them.
This is required for apps using the OpenTelemetry HTTP exporter to report data to AppSignal.
enableStatsd
Config file key | enableStatsd |
---|---|
System environment key | APPSIGNAL_ENABLE_STATSD |
Required | no |
Type | Boolean (true / false ) |
Default value | false |
Available since version | 2.2.2 |
Description
Enables the StatsD server in the AppSignal agent.
When enabled, the AppSignal agent will listen to a localhost
-bound server on port 8125. If you're running several AppSignal-instrumented applications in the same server, this configuration option can only be enabled in one of them.
filesWorldAccessible
Config file key | filesWorldAccessible |
---|---|
System environment key | APPSIGNAL_FILES_WORLD_ACCESSIBLE |
Required | no |
Type | Boolean (true / false ) |
Default value | true |
Available since version | 2.2.4 |
Description
If this is set to true
the AppSignal working directory that is created is accessible for all users (Unix permissions 0666
). This is often necessary because processes for the same app run under a different user. Set to false
to disable this behaviour (Unix permissions 0644
).
filterParameters
Config file key | filterParameters |
---|---|
System environment key | APPSIGNAL_FILTER_PARAMETERS |
Required | no |
Type | list(String) |
Default value | [] |
Available since version | 2.2.5 |
Description
List of parameter keys that should be ignored using AppSignal filtering. Their values will be replaced with [FILTERED]
when transmitted to AppSignal.
Read more about parameter filtering.
filterSessionData
Config file key | filterSessionData |
---|---|
System environment key | APPSIGNAL_FILTER_SESSION_DATA |
Required | no |
Type | list(String) |
Default value | [] |
Available since version | 2.2.5 |
Description
List of session data keys that should be ignored using AppSignal filtering. Their values will be replaced with [FILTERED]
when transmitted to AppSignal.
Read more about session data filtering.
hostname
Config file key | hostname |
---|---|
System environment key | APPSIGNAL_HOSTNAME |
Required | no |
Type | String |
Default value | detected from system |
Description
This overrides the server's hostname. Useful for when you're unable to set a custom hostname or when a nondescript id is generated for you on hosting services.
hostRole
Config file key | hostRole |
---|---|
System environment key | APPSIGNAL_HOST_ROLE |
Required | no |
Type | String |
Default value | nil (This is unset by default) |
Available since version | 3.0.19 |
Description
Group hosts by role and generate metrics based on this role. One such metric is the reporting_hosts
counter metric. A good role indicates what the main role of the server is, like "webserver", "processor", "api", "database", "loadbalancer", etc.
httpProxy
Config file key | httpProxy |
---|---|
System environment key | APPSIGNAL_HTTP_PROXY |
Required | no |
Type | String |
Default value | nil (This is unset by default) |
Description
If you require the agent to connect to the Internet via a proxy set the complete proxy URL in this configuration key.
ignoreActions
Config file key | ignoreActions |
---|---|
System environment key | APPSIGNAL_IGNORE_ACTIONS |
Required | no |
Type | list(String) |
Default value | [] |
Description
List of actions that will be ignored, everything that happens including exceptions will not be transmitted to AppSignal.
Read more about ignoring actions.
ignoreErrors
Config file key | ignoreErrors |
---|---|
System environment key | APPSIGNAL_IGNORE_ERRORS |
Required | no |
Type | list(String) |
Default value | [] |
Description
List of error classes that will be ignored. Any exception raised with this error class will not be transmitted to AppSignal. Read more about ignoring errors.
ignoreLogs
Config file key | ignoreLogs |
---|---|
System environment key | APPSIGNAL_IGNORE_LOGS |
Required | no |
Type | list(String) |
Default value | [] |
Available since version | 3.4.0 |
Description
List of log messages that will be ignored. Any log message containing any of the elements of the list will not be transmitted to AppSignal. A small subset of regex syntax is supported, read more about it in our Ignore Logs guide.
ignoreNamespaces
Config file key | ignoreNamespaces |
---|---|
System environment key | APPSIGNAL_IGNORE_NAMESPACES |
Required | no |
Type | list(String) |
Default value | [] |
Description
List of namespaces that will be ignored. Any error raised or slow request that occurs in this namespace will not be send to AppSignal. Read more about namespaces.
log
Config file key | log |
---|---|
System environment key | APPSIGNAL_LOG |
Required | no |
Type | String |
Default value | file |
Description
Select which logger the AppSignal integration will use. Accepted values are
file
and stdout
. See also the log_path
configuration.
file
(default)- Write all AppSignal logs to the file system.
stdout
(default on Heroku)- Print AppSignal logs in the parent process' STDOUT instead of to a file. Useful with hosting solutions such as container systems and Heroku.
logLevel
Config file key | logLevel |
---|---|
System environment key | APPSIGNAL_LOG_LEVEL |
Required | no |
Type | String |
Default value | info |
Available since version | 2.2.6 |
Description
Set the severity level of AppSignal's internal logger. If it is configured to "info" it will log all error, warning and info messages, but not log the debug messages.
Setting it to the levels "debug" or "trace" is usually only needed on request from support. Setting the level to "debug"/"trace" could have a slight impact on the disk usage and IO, especially on high-traffic sites. CPU overhead is minimal with the debug option enabled.
Accepted values:
- error
- warning
- info
- debug
- trace
logPath
Config file key | logPath |
---|---|
System environment key | APPSIGNAL_LOG_PATH |
Required | no |
Type | String |
Default value | /tmp |
Description
Override the location of the path (directory) where the appsignal.log
file can be written to.
opentelemetry_port
Config file key | opentelemetry_port |
---|---|
System environment key | APPSIGNAL_OPENTELEMETRY_PORT |
Required | no |
Type | String |
Default value | 8099 |
Available since version | 3.1.0 |
Description
Set this option to configure the OpenTelemetry HTTP server port of the AppSignal agent process. Configure this port if another process is already running on the machine that is also using this port to avoid conflicts.
requestHeaders
Config file key | requestHeaders |
---|---|
System environment key | APPSIGNAL_REQUEST_HEADERS |
Required | no |
Type | list(String) |
Default value | ["accept", "accept-charset", "accept-encoding", "accept-language", "cache-control", "connection", "content-length", "range"] |
Available since version | 2.2.5 |
Description
The requestHeaders
config option contains a list of HTTP request headers which are read and stored by the AppSignal Node.js package.
This requestHeaders
config option is an allowlist, which means that it will only take headers as specified by this config option. If this config option is unset it will use the AppSignal default.
Following list is the AppSignal package default.
client = Appsignal.new( // ...Other config opts requestHeaders: [ "accept", "accept-charset", "accept-encoding", "accept-language", "cache-control", "connection", "content-length", "range" ] )
To configure AppSignal to not store any HTTP request headers on AppSignal transactions, configure the option with an empty list.
client = Appsignal.new( // ...Other config opts requestHeaders: [] )
revision
Config file key | revision |
---|---|
System environment key | APP_REVISION |
Required | no |
Type | String |
Default value | nil (This is unset by default) |
Available since version | 1.0.0 |
|
Description
Set the app revision to report the currently running version of your app. AppSignal will create a deploy marker when this value changes, and tag all incoming data with the current revision.
When your application is deployed using Kamal, or when it is deployed to Render, or when it is deployed to Heroku and the Heroku Labs: Dyno Metadata feature is enabled, the AppSignal integration will automatically detect the Git commit of the current deployment and use it as the revision.
You can overwrite the automatically detected revisions in Heroku, Render or Kamal by manually setting the revision
config option to a custom value.
Read more about deploy markers on the deploy markers.
runningInContainer
Config file key | runningInContainer |
---|---|
System environment key | APPSIGNAL_RUNNING_IN_CONTAINER |
Required | no |
Type | Boolean (true / false ) |
Default value | detected by agent |
Description
AppSignal expects to be running on the same machine between different deploys. Set this key to true
if the application or agent is running in a container, such as with Docker.
Newer versions of the AppSignal integration automatically detect its container environment, so no manual configuration is necessary. If you're having trouble with the automatic detection, please contact support.
This option is set to true
automatically on Heroku.
sendEnvironmentMetadata
Config file key | sendEnvironmentMetadata |
---|---|
System environment key | APPSIGNAL_SEND_ENVIRONMENT_METADATA |
Required | no |
Type | Boolean (true / false ) |
Default value | true |
Available since version | 2.2.6 |
Description
Send environment metadata about the app.
For more information please read about environment metadata.
sendParams
Config file key | sendParams |
---|---|
System environment key | APPSIGNAL_SEND_PARAMS |
Required | no |
Type | Boolean (true / false ) |
Default value | true |
Available since version | 2.2.8 |
Description
Whether to skip sending request parameters to AppSignal.
For more information please read about send_params in filtering request parameters.
sendSessionData
Config file key | sendSessionData |
---|---|
System environment key | APPSIGNAL_SEND_SESSION_DATA |
Required | no |
Type | Boolean (true / false ) |
Default value | true |
Available since version | 2.2.9 |
Description
Set this option to false
to not send any session data with exception traces and performance issue samples.
statsdPort
Config file key | statsdPort |
---|---|
System environment key | APPSIGNAL_STATSD_PORT |
Required | no |
Type | Integer |
Default value | 8125 |
Available since version | 3.0.16 |
Description
Set this option to configure the StatsD HTTP server port of the AppSignal agent process. Configure this port if another process is already running on the machine that is also using this port to avoid conflicts.
workingDirectoryPath
Config file key | workingDirectoryPath |
---|---|
System environment key | APPSIGNAL_WORKING_DIRECTORY_PATH |
Required | no |
Type | String |
Default value | detected by agent |
Available since version | 1.0.0 |
Description
Override the location where AppSignal for Node.js can store temporary files. Use this option if the default location is not suitable. See our how AppSignal operates page for more information about the purpose of this working directory.
If you are running multiple applications using AppSignal on the same server, use this configuration option to select different working directories for every AppSignal instance, otherwise the two instances could conflict with one another. For more information on this scenario see our running multiple applications on one host documentation.
// Example: appsignal.js const { Appsignal } = require("@appsignal/nodejs"); const appsignal = new Appsignal({ // Other config workingDirectoryPath: "/tmp/project_1" });