(jina-env-vars)=

{octicon}`list-unordered` Environment Variables

Jina-serve uses environment variables to determine different behaviours. To see all supported environment variables and their current values, run:

bash

jina -vf

If you use containerized Executors (including {ref}Kubernetes <kubernetes> and {ref}Docker Compose <docker-compose>), you can pass separate environment variables to each Executor in the following way:

{tab}


```yaml
jtype: Flow
with: {}
executors:
- name: executor0
  port: 49583
  env:
    JINA_LOG_LEVEL: DEBUG
    MYSECRET: ${{ ENV.MYSECRET }}
- name: executor1
  port: 62156
  env:
    JINA_LOG_LEVEL: INFO
    CUDA_VISIBLE_DEVICES: 1
```

{tab}


```yaml
jtype: Deployment
with:
  name: executor0
  port: 49583
  env:
    JINA_LOG_LEVEL: DEBUG
    MYSECRET: ${{ ENV.MYSECRET }}
```

{tab}


```python
from jina import Flow
import os

secret = os.environ['MYSECRET']
f = (
    Flow()
    .add(env={'JINA_LOG_LEVEL': 'DEBUG', 'MYSECRET': secret})
    .add(env={'JINA_LOG_LEVEL': 'INFO', 'CUDA_VISIBLE_DEVICES': 1})
)
f.save_config("envflow.yml")
```

The following environment variables are used internally in Jina:

Environment variable	Description
`JINA_AUTH_TOKEN`	Authentication token of Jina Cloud
`JINA_DEFAULT_HOST`	Default host where server is exposed
`JINA_DEFAULT_TIMEOUT_CTRL`	Default timeout time used by Flow to check readiness of Executors
`JINA_DEPLOYMENT_NAME`	Name of deployment, used by Head Runtime in Kubernetes to connect to different deployments
`JINA_DISABLE_UVLOOP`	If set, Jina will not use uvloop event loop for concurrent execution
`JINA_FULL_CLI`	If set, all CLI options will be shown in help
`JINA_GATEWAY_IMAGE`	Used when exporting a Flow to Kubernetes or Docker Compose to override default gateway image
`JINA_GRPC_RECV_BYTES`	Set by gRPC service to keep track of received bytes
`JINA_GRPC_SEND_BYTES`	Set by gRPC service to keep track of sent bytes
`JINA_K8S_ACCESS_MODES`	Configures access modes for `PersistentVolumeClaim` attached to `StatefulSet`, when creating a `StatefulSet` in Kubernetes for an Executor using volumes. Defaults to '["ReadWriteOnce"]'
`JINA_K8S_STORAGE_CAPACITY`	Configures capacity for `PersistentVolumeClaim` attached to `StatefulSet`, when creating a `StatefulSet` in Kubernetes for an Executor using volumes. Defaults to '10G'
`JINA_K8S_STORAGE_CLASS_NAME`	Configures storage class for `PersistentVolumeClaim` attached to `StatefulSet`, when creating a `StatefulSet` in Kubernetes for an Executor using volumes. Defaults to 'standard'
`JINA_LOCKS_ROOT`	Root folder where file locks for concurrent Executor initialization
`JINA_LOG_CONFIG`	Configuration used for logger
`JINA_LOG_LEVEL`	Logging level used: INFO, DEBUG, WARNING
`JINA_LOG_NO_COLOR`	If set, disables color from rich console
`JINA_MP_START_METHOD`	Sets multiprocessing start method used by Jina
`JINA_OPTOUT_TELEMETRY`	If set, disables telemetry
`JINA_RANDOM_PORT_MAX`	Maximum port number used when selecting random ports to apply for Executors or Gateway
`JINA_RANDOM_PORT_MIN`	Minimum port number used when selecting random ports to apply for Executors or Gateway
`JINA_STREAMER_ARGS`	Jina uses this variable to inject `GatewayStreamer` arguments into host environment running a Gateway

{octicon}`list-unordered` Environment Variables

{octicon}list-unordered Environment Variables

{octicon}`list-unordered` Environment Variables