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52 lines
1.5 KiB
Markdown
52 lines
1.5 KiB
Markdown
## functions/resizer
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Use this FaaS function to resize an image with ImageMagick.
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**Deploy the resizer function**
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(Make sure you have already deployed FaaS with ./deploy_stack.sh in the root of this Github repository.
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* Option 1 - click *Create a new function* on the FaaS UI
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* Option 2 - use the [faas-cli](https://github.com/alexellis/faas-cli/) (experimental)
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```
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# curl -SL https://github.com/alexellis/faas-cli/releases/download/0.1-alpha/faas-cli-macos > faas-cli
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# chmod +x ./faas-cli
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# ./faas-cli -action=deploy -image=functions/resizer -name=resizer \
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-fprocess="convert - -resize 50% fd:1"
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200 OK
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URL: http://localhost:8080/function/resizer
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```
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* Option 3 - use `curl` to deploy the function
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```
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$ curl -s --fail localhost:8080/system/functions -d \
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'{
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"service": "resizer",
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"image": "functions/resizer",
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"envProcess": "convert - -resize 50% fd:1",
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"network": "func_functions"
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}'
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```
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**Resize a picture by 50%**
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Now pick an image such as the included picture of Gordon and use `curl` or a tool of your choice to send the data to the function. Pipe the result into a new file like this:
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```
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$ curl localhost:8080/function/resizer --data-binary @gordon.png > small_gordon.png
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```
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**Customize the transformation**
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If you want to customise the transformation then edit the Dockerfile or the fprocess variable and create a new function.
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**Remove the function**
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You can remove the function with `docker service rm resizer`.
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