This will run with docker in docker.
docker run --privileged --rm --name fns -it -v $PWD/data:/app/data -p 80:8080 fnproject/fnserver
See below for starting without docker in docker.
When starting Fn, you can pass in the following configuration variables as environment variables. Use -e VAR_NAME=VALUE
in
docker run. For example:
docker run -e VAR_NAME=VALUE ...
Env Variables | Description | Default values |
---|---|---|
FN_DB_URL |
The database URL to use in URL format. See Databases for more information. | sqlite3:///app/data/fn.db |
FN_MQ_URL |
The message queue to use in URL format. See Message Queues for more information. | bolt:///app/data/worker_mq.db |
FN_API_URL |
The primary Fn API URL to that this instance will talk to. In a production environment, this would be your load balancer URL. | N/A |
FN_PORT |
Sets the port to run on | 8080 |
FN_LOG_LEVEL |
Set to DEBUG to enable debugging | INFO |
FN_LOG_DEST |
Set a url to send logs to, instead of stderr. [scheme://][host][:port][/path]; default scheme to udp:// if none given, possible schemes: { udp, tcp, file } | |
FN_LOG_PREFIX |
If supplying a syslog url in FN_LOG_DEST , a prefix to add to each log line |
|
FN_API_CORS |
A comma separated list of URLs to enable CORS for (or * for all domains). This corresponds to the allowed origins in the Acccess-Control-Allow-Origin header. |
None |
FN_FREEZE_IDLE_MSECS |
Set this option to specify the amount of time to wait in milliseconds before pausing/freezing an idle hot container. Set to 0 to freeze idle containers without any delay. Set to negative integer to disable freeze/pause of idle hot containers. | 50 |
FN_EJECT_IDLE_MSECS |
Set this option to specify the amount of time in milliseconds to periodically check to terminate an idle hot container if the system is starved for CPU and Memory resources. Set to negative integer to disable this feature. | 1000 |
FN_MAX_RESPONSE_SIZE |
Set this option to specify the http body or json response size in bytes from the containers. | 0 (off) |
DOCKER_HOST |
Docker remote API URL. | /var/run/docker.sock |
DOCKER_API_VERSION |
Docker remote API version. | 1.24 |
DOCKER_TLS_VERIFY |
Set this option to enable/disable Docker remote API over TLS/SSL. | 0 |
DOCKER_CERT_PATH |
Set this option to specify where CA cert placeholder. | ~/.docker/cert.pem |
FN_MAX_FS_SIZE_MB |
Set this option in MB to pass a size option to Docker storage driver. This limits the file system size for all containers on the system. See Docker storage driver options per container documentation for details. |
None |
The default way to run Fn, as it is in the Quickstart guide, is to use docker-in-docker (dind). There are a couple reasons why we did it this way:
- It's clean. Once the container exits, there is nothing left behind including all the function images.
- You can set resource restrictions for the entire Fn instance. For instance, you can set
--memory
on the docker run command to set the max memory for the Fn instance AND all of the functions it's running.
There are some reasons you may not want to use dind, such as using the image cache during testing or you're running Windows.
One way is to mount the host Docker. Everything is essentially the same except you add a -v
flag:
docker run --rm --name functions -it -v /var/run/docker.sock:/var/run/docker.sock -v $PWD/data:/app/data -p 8080:8080 fnproject/fnserver
On Linux systems where SELinux is enabled and set to "Enforcing", SELinux will stop the container from accessing the host docker and the local directory mounted as a volume, so this method cannot be used unless security restrictions are disabled.
You can of course just run the binary directly, you'll just have to change how you set the environment variables above.
See contributing doc for information on how to build and run.