Reference
Components
The server is made up of several components, responsible for specific tasks, necessary for the service to operate:
| Name | Description |
|---|---|
settings | keeps track of updated runtime properties for the server |
compiler | transforms a pipeline into an executable workload for the worker |
database | integrates with a database provider for storing application data at rest |
queue | integrates with a queue provider for pushing workloads that will be run by a worker |
secret | integrates with a secret provider for storing sensitive application data at rest |
source | integrates with a source control management (SCM) provider for authentication and authorization |
tracing | implements OpenTelemetry tracing instrumentation for the server |
Required
This section contains a list of all variables that must be provided to the server.
Some properties can be updated while the server is running using the settings component.
VELA_ADDR
This variable sets a fully qualified URL to the Vela server address.
The variable should be provided as a string.
VELA_DATABASE_ENCRYPTION_KEY
This configuration variable is used by the database component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets the AES key for encrypting/decrypting values for data stored in the database.
The variable should be provided as an string.
VELA_QUEUE_ADDR
This configuration variable is used by the queue component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets a fully qualified URL to the queue instance for pushing workloads that will be run by a worker.
The variable should be provided as a string.
VELA_QUEUE_DRIVER
This configuration variable is used by the queue component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets the driver to use for the queue functionality for the server.
The variable should be provided as a string.
Note:
This variable should match the VELA_QUEUE_DRIVER variable provided to the worker.
The possible options to provide for this variable are:
redis
VELA_SCM_CLIENT
This configuration variable is used by the SCM component for the server.
This variable sets the client ID from the OAuth application created on the SCM system.
The variable should be provided as a string.
VELA_SCM_SECRET
This configuration variable is used by the SCM component for the server.
This variable sets the client secret from the OAuth application created on the SCM system.
The variable should be provided as a string.
VELA_SERVER_PRIVATE_KEY
This variable sets the private key that will be used to sign all JWT tokens within Vela. Please be sure to follow guidelines related to generating a private key.
The variable should be provided as a string.
Optional
This section contains a list of all variables that can be provided to the server.
Some properties can be updated while the server is running using the settings component.
VELA_CLONE_IMAGE
This configuration variable is used by the compiler component for the server.
The clone image sets the clone image to use for the Vela injected clone step in a pipeline.
By default, Vela will use the latest available release of the clone image at the time of a server release.
This variable should be provided as a string.
This property can be updated while the server is running using the settings component.
VELA_COMPILER_GITHUB
This configuration variable is used by the compiler component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable enables using GitHub or GitHub Enterprise Server as a registry for fetching pipeline templates from.
By default, Vela will use GitHub as a registry for fetching templates.
However, to fetch templates from a private organization or repository on GitHub, you need to provide this configuration.
The variable can be provided as a boolean.
Note:
This variable has a default value offalse.VELA_COMPILER_GITHUB_TOKEN
This configuration variable is used by the compiler component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets a Personal Access Token (PAT) for fetching pipeline templates from GitHub or GitHub Enterprise Server.
By default, Vela will use GitHub as a registry for fetching templates.
However, to fetch templates from a private organization or repository on GitHub, you need to provide this configuration.
The variable can be provided as a string.
VELA_COMPILER_GITHUB_URL
This configuration variable is used by the compiler component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets a fully qualified URL to GitHub or GitHub Enterprise Server used for fetching pipeline templates from.
By default, Vela will use GitHub as a registry for fetching templates.
However, to fetch templates from a private organization or repository on GitHub, you need to provide this configuration.
The variable can be provided as a string.
VELA_DATABASE_ADDR
This configuration variable is used by the database component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets a fully qualified URL to the database instance for storing data at rest.
The variable can be provided as a string.
Note:
This variable has a default value ofvela.sqlite.VELA_DATABASE_COMPRESSION_LEVEL
This configuration variable is used by the database component for the server.
This variable sets the level of compression for workload logs, uploaded by the Vela worker, which are stored in the database.
The variable can be provided as an integer.
Note:
This variable has a default value of 3.
The possible options to provide for this variable are:
-10- produces no compression for the log data1- produces compression for the log data the fastest and with the largest size of data2345- produces compression for the log data with an even balance of speed and size of data6789- produces compression for the log data the slowest and with the smallest size of data
VELA_DATABASE_CONNECTION_IDLE
This configuration variable is used by the database component for the server.
This variable sets the maximum number of idle connections allowed for the database client.
The variable can be provided as an integer.
Note:
This variable has a default value of2.VELA_DATABASE_CONNECTION_LIFE
This configuration variable is used by the database component for the server.
This variable sets the maximum duration of time a connection is reusable for the database client.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of30m.VELA_DATABASE_CONNECTION_OPEN
This configuration variable is used by the database component for the server.
This variable sets the maximum number of open connections allowed for the database client.
The variable can be provided as an integer.
Note:
This variable has a default value of0 (meaning no limit is set).VELA_DATABASE_DRIVER
This configuration variable is used by the database component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets the driver to use for the database functionality for the server.
The variable can be provided as a string.
Note:
This variable has a default value of sqlite3.
The possible options to provide for this variable are:
postgressqlite3
VELA_DATABASE_SKIP_CREATION
This configuration variable is used by the database component for the server.
This variable enables skipping the creation of tables and indexes in the database system.
The variable can be provided as a boolean.
Note:
This variable has a default value offalse.VELA_DATABASE_LOG_LEVEL
This configuration variable is used by the database component for the server.
This variable controls the log level to use in the database system. This can be different than the log level for the rest of the application.
The variable can be provided as a string (trace, debug, info, warn, error, fatal, panic).
Note:
This variable has a default value ofwarn.VELA_DATABASE_LOG_SHOW_SQL
This configuration variable is used by the database component for the server.
This variable controls whether to show the SQL query in the logs for the database system.
The variable can be provided as a boolean.
Note:
This variable has a default value offalse.VELA_DATABASE_LOG_SKIP_NOTFOUND
This configuration variable is used by the database component for the server.
This variable controls whether to skip showing record not found errors in the logs for the in the database system.
The variable can be provided as a boolean.
Note:
This variable has a default value oftrue.VELA_DATABASE_LOG_SLOW_THRESHOLD
This configuration variable is used by the database component for the server.
This variable controls the threshold that determines which queries are considered slow and logged in the database system.
The variable can be provided as a duration.
Note:
This variable has a default value of200ms.VELA_DEFAULT_BUILD_LIMIT
This variable sets the default amount of concurrent builds a repo is allowed to run.
In this context, concurrent builds refers to any pending or running builds for that repo.
If the amount of concurrent builds for a repo matches the limit, then any new builds will be blocked from being created.
The variable can be provided as an integer.
Note:
This variable has a default value of10.VELA_DEFAULT_BUILD_TIMEOUT
This variable sets the default duration of time a build is allowed to run on a worker.
The variable can be provided as an integer.
Note:
This variable has a default value of30.VELA_DEFAULT_REPO_EVENTS
This variable sets the default active events for newly activated repositories.
The variable can be provided as a comma-separated list (i.e. push,tag,deployment).
Note:
By default, thepush event is enabled. Valid values are: push, pull_request, tag, deployment, and comment.VELA_DISABLE_WEBHOOK_VALIDATION
This variable disables validation of webhooks sent by the SCM to the server.
The variable can be provided as a boolean.
Note:
This variable should only be used for local development.
This variable has a default value of false.
VELA_ENABLE_SECURE_COOKIE
This enables using cookies with the secure flag set by the server.
The variable can be provided as a boolean.
Note:
This variable should only be used for local development.
This variable has a default value of true.
VELA_LOG_FORMATTER
This variable sets whether the logging formatter used for structured server logs is a standard JSON logger, or a custom Elasticsearch Common Schema (ECS) compatible JSON formatter.
The variable can be provided as a string.
Note:
This variable has a default value ofjson. Valid values are: json, and ecs.VELA_MAX_BUILD_LIMIT
This variable sets the maximum amount of concurrent builds a repo is allowed to run.
In this context, concurrent builds refers to any pending or running builds for that repo.
If the amount of concurrent builds for a repo matches the limit, then any new builds will be blocked from being created.
The variable can be provided as an integer.
Note:
This variable has a default value of 30.
This variable should match the VELA_MAX_BUILD_LIMIT variable provided to the UI.
VELA_MODIFICATION_ADDR
This configuration variable is used by the compiler component for the server.
This variable sets a fully qualified URL to the modification endpoint used for the compiler.
The variable can be provided as a string.
VELA_MODIFICATION_RETRIES
This configuration variable is used by the compiler component for the server.
This variable sets the maximum number of times to resend failed requests to the modification endpoint for the compiler.
The variable can be provided as an integer.
Note:
This variable has a default value of5.VELA_MODIFICATION_SECRET
This configuration variable is used by the compiler component for the server.
This variable sets a shared secret for authenticating communication between the compiler and the modification endpoint.
The variable can be provided as a string.
VELA_MODIFICATION_TIMEOUT
This configuration variable is used by the compiler component for the server.
This variable sets the maximum duration of time the compiler will wait before timing out requests sent to the modification endpoint.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of8s.VELA_MAX_TEMPLATE_DEPTH
This configuration variable is used by the compiler component for the server.
This variable sets the maximum depth of nested templates that can be called during compilation.
The variable can be provided as an integer.
Note:
This variable has a default value of3.This property can be updated while the server is running using the settings component.
VELA_COMPILER_STARLARK_EXEC_LIMIT
This configuration variable is used by the compiler component for the server.
This variable sets the starlark execution step limit for compiling starlark pipelines.
The variable can be provided as an integer.
Note:
This variable has a default value of7500.This property can be updated while the server is running using the settings component.
VELA_PORT
This variable sets the port the server API responds on for HTTP requests.
The variable can be provided as a string.
Note:
This variable has a default value of8080.VELA_QUEUE_CLUSTER
This configuration variable is used by the queue component for the server.
This variable enables the server to connect to a queue cluster rather than a standalone instance.
The variable can be provided as a boolean.
Note:
This variable should match theVELA_QUEUE_CLUSTER variable provided to the worker.VELA_QUEUE_POP_TIMEOUT
This configuration variable is unused by the queue component for the server.
This variable sets the maximum duration of time the worker will wait before timing out requests sent for pushing workloads.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of60s.VELA_QUEUE_ROUTES
This configuration variable is used by the queue component for the server.
This variable sets the unique channels or topics to push workloads to.
The variable can be provided as a comma-separated list (i.e. myRoute1,myRoute2).
Note:
This variable has a default value ofvela.This property can be updated while the server is running using the settings component.
VELA_QUEUE_PRIVATE_KEY
This variable sets a private key secret for signing queue items that will be opened by the worker’s
The variable should be provided as a base64 encoded string.
VELA_QUEUE_PUBLIC_KEY
This variable sets a public key secret for opening queue items that have been signed by the server’s
The variable should be provided as a base64 encoded string.
VELA_REPO_ALLOWLIST
This variable sets a group of repositories, from the SCM, that can be enabled on the server.
The variable can be provided as a comma-separated list (i.e. myOrg1/myRepo1,myOrg1/myRepo2,myOrg2/*).
Note:
By default, no repositories are allowed to be enabled. To allow any repository to be enabled, provide a single value of*.This property can be updated while the server is running using the settings component.
VELA_SCHEDULE_ALLOWLIST
This variable sets a group of repositories, from the SCM, that can create a schedule for a repo on the server.
The variable can be provided as a comma-separated list (i.e. myOrg1/myRepo1,myOrg1/myRepo2,myOrg2/*).
Note:
By default, no repositories are allowed to create a schedule. To allow any repository to create a schedule, provide a single value of*.This property can be updated while the server is running using the settings component.
VELA_SCHEDULE_MINIMUM_FREQUENCY
This variable sets the minimum frequency allowed to be set for a schedule.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of1h.VELA_SCM_ADDR
This configuration variable is used by the SCM component for the server.
This variable sets a fully qualified URL to the source control management (SCM) system.
The variable can be provided as a string.
Note:
This variable has a default value ofhttps://github.com.VELA_SCM_CONTEXT
This configuration variable is used by the SCM component for the server.
This variable sets the message to set in the commit status on the SCM system.
The variable can be provided as a string.
Note:
This variable has a default value ofcontinuous-integration/vela.VELA_SCM_DRIVER
This configuration variable is used by the SCM component for the server.
This variable sets the driver to use for the SCM functionality for the server.
The variable can be provided as a string.
Note:
This variable has a default value of github.
The possible options to provide for this variable are:
github
VELA_SCM_SCOPES
This configuration variable is used by the SCM component for the server.
This variable sets the permission scopes to apply for OAuth credentials captured from the SCM system.
The variable can be provided as a comma-separated list (i.e. myScope1,myScope2).
Note:
This variable has a default value ofread:org,read:user,repo,repo:status,user:email.VELA_SCM_WEBHOOK_ADDR
This configuration variable is used by the SCM component for the server.
This variable sets a fully qualified URL on the SCM system to send webhooks to the server.
The variable can be provided as a string.
Note:
This variable has a default value of theVELA_ADDR variable provided to the server.VELA_SECRET
This variable sets a shared secret with the Vela worker for authenticating communication between workers and the server.
Only necessary to provide if utilizing the server-worker trusted symmetric worker authentication method.
The variable should be provided as a string.
Note:
This variable should match theVELA_SERVER_SECRET variable provided to the worker.VELA_SECRET_VAULT
This configuration variable is used by the secret component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable enables using HashiCorp Vault as a secret engine.
The variable can be provided as a boolean.
Note:
This variable has a default value offalse.VELA_SECRET_VAULT_ADDR
This configuration variable is used by the secret component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets a fully qualified URL to the HashiCorp Vault instance.
The variable can be provided as a string.
VELA_SECRET_VAULT_AUTH_METHOD
This configuration variable is used by the secret component for the server.
This variable sets the authentication method to obtain a token from the HashiCorp Vault instance.
The variable can be provided as a string.
VELA_SECRET_VAULT_AWS_ROLE
This configuration variable is used by the secret component for the server.
This variable sets the HashiCorp Vault role to connect to the auth/aws/login endpoint.
The variable can be provided as a string.
VELA_SECRET_VAULT_PREFIX
This configuration variable is used by the secret component for the server.
This variable sets the prefix for k/v secrets in the HashiCorp Vault instance.
The variable can be provided as a string.
VELA_SECRET_VAULT_RENEWAL
This configuration variable is used by the secret component for the server.
This variable sets the frequency to renew the token for the HashiCorp Vault instance.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of30m.VELA_SECRET_VAULT_TOKEN
This configuration variable is used by the secret component for the server.
Examples using this configuration variable are provided in the above reference documentation.
This variable sets the token for accessing the HashiCorp Vault instance.
The variable can be provided as a string.
VELA_SECRET_VAULT_VERSION
This configuration variable is used by the secret component for the server.
This variable sets the version for the k/v backend for the HashiCorp Vault instance.
The variable can be provided as a string.
Note:
This variable has a default value of2.VELA_USER_ACCESS_TOKEN_DURATION
This variable sets the maximum duration of time a Vela access token for a user is valid on the server.
The access token is used for authenticating user’s requests to the server.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of15m.VELA_USER_REFRESH_TOKEN_DURATION
This variable sets the maximum duration of time a Vela refresh token for a user is valid on the server.
The refresh token is used for refreshing a user’s access token on the server.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of8h.VELA_BUILD_TOKEN_BUFFER_DURATION
This variable sets the maximum duration of time a Vela build token for a build extends beyond the repo build limit to maintain validity on the server.
The build token is used for authenticating a worker’s access to the server to update build resources.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of5m.VELA_WEBUI_ADDR
This variable sets a fully qualified URL to the Vela UI address.
The variable can be provided as a string.
VELA_WEBUI_OAUTH_CALLBACK_PATH
This variable sets the endpoint to use for the OAuth callback path for the Vela UI.
The variable can be provided as a string.
Note:
This variable has a default value of/account/authenticate.VELA_WORKER_AUTH_TOKEN_DURATION
This variable sets the maximum duration of time a Vela auth token for a worker is valid on the server.
The worker auth token is used for authenticating a worker’s access to the server to check-in and request build tokens.
The variable can be provided as a duration (i.e. 5s, 10m).
Notes:
This variable should be longer than the VELA_CHECK_IN in order to be able to refresh the auth token.
This variable has a default value of 20m.
VELA_WORKER_REGISTER_TOKEN_DURATION
This variable sets the maximum duration of time a Vela registration token for a worker is valid on the server.
The worker register token is used for onboarding a worker onto the server and beginning its auth refresh routine.
The variable can be provided as a duration (i.e. 5s, 10m).
Notes:
This variable should be relatively short-lived. There is a CLI Command to quicken the registration process for admins.
This variable has a default value of 1m.
VELA_WORKER_ACTIVE_INTERVAL
This variable sets the interval of time the workers will be considered active. A worker is considered active if it has registered with the server inside the give duration.
The variable can be provided as a duration (i.e. 5s, 10m).
Note:
This variable has a default value of5m.The value should coordinate with the
VELA_CHECK_IN setting provided to the worker.VELA_OTEL_TRACING_ENABLE
This variable enables OpenTelemetry tracing for the Vela server. You must provide VELA_OTEL_EXPORTER_OTLP_ENDPOINT when tracing is enabled.
Notes:
This variable has a default value offalse.VELA_OTEL_TRACING_SERVICE_NAME
This variable sets the service name applied to traces.
Notes:
This variable has a default value ofvela-server.VELA_OTEL_EXPORTER_OTLP_ENDPOINT
This variable sets the OTel exporter endpoint (ex. scheme://host:port).
Note:
This variable has no default value.When tracing is enabled this variable is required.
VELA_OTEL_TRACING_EXPORTER_SSL_CERT_PATH
This variable sets the path to certs used for communicating with the OTel exporter. If nothing is provided, will use insecure communication.
Note:
This variable has no default value.Providing no value for this variable instructs the server to export traces insecurely (no SSL).
VELA_OTEL_TRACING_TLS_MIN_VERSION
This optional variable sets a TLS minimum version used when exporting traces to the OTel exporter.
Note:
This variable has a default value of1.2.VELA_OTEL_TRACING_SAMPLER_RATELIMIT_PER_SECOND
This variable sets OTel tracing head-sampler rate-limiting to N per second.
Note:
This variable has a default value of100, meaning the server can record a maximum of 100 traces per second.VELA_OTEL_TRACING_SAMPLER_TASKS_CONFIG_FILEPATH
This variable sets an (optional) filepath to the OTel tracing head-sampler configurations json to alter how certain tasks (endpoints, queries, etc) are sampled.
A task is basically the “span name” based on the work being performed. A task can be an API endpoint interaction, a gorm query, etc.
See: https://opentelemetry.io/docs/specs/OTel/trace/api/#span
Note:
This variable has no default value.When no path is provided all tasks are recorded using provided shared parameters.
VELA_OTEL_TRACING_RESOURCE_ATTRIBUTES
This variable sets OTel resource (span) attributes as a list of key=value pairs. each one will be attached to each span as a ‘process’ attribute.
Note:
This variable has no default value.VELA_OTEL_TRACING_RESOURCE_ENV_ATTRIBUTES
This variable sets OTel resource (span) attributes as a list of key=env_variable_key pairs. each one will be attached to each span as a ‘process’ attribute where the value is retrieved from the environment using the pair value.
Note:
This variable has no default value.VELA_OTEL_TRACING_SPAN_ATTRIBUTES
This variable sets trace span attributes as a list of key=value pairs. Each pair will be attached to each span as a ’tag’ attribute.
Note:
This variable has no default value.VELA_OTEL_TRACING_TRACESTATE_ATTRIBUTES
This variable sets OTel tracestate (span) attributes as a list of key=value pairs. Each pair will be inserted into the tracestate for each sampled span.