De facto standard is using docker-compose for apps
Package and distribute using container registry
Standalone binary in version <= 0.6
Docker CLI plugin in version >= 0.7
Workshop by Docker Captain Michael Irwin @ Docker Summit 2019
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This is an experimental CLI feature:
cp ~/.docker/config.json ~/.docker/config.json.bak
cat ~/.docker/config.json.bak | jq '. + {"experimental": "enabled"}' >~/.docker/config.json
–
Create an app stack in hello.dockerapp:
docker app init --compose-file docker-compose.yml hello
Add parameters port and text
Push to registry and check resulting app:
docker app push --tag localhost:5000/hello:1.0 hello
docker app inspect localhost:5000/hello:1.0
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Render app from registry:
docker app render localhost:5000/hello:1.0
Render app with custom parameter:
docker app render \
--set text="hello containerconf" \
localhost:5000/hello:1.0
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Stored like an image
Check image manifest:
MANIFEST=$(curl -sH \
"Accept: application/vnd.docker.distribution.manifest.v2+json" \
http://localhost:5000/v2/hello/manifests/1.0)
Image configuration is boring:
CONFIG=$(echo "${MANIFEST}" | jq --raw-output '.config.digest')
curl -o - \
http://localhost:5000/v2/hello/blobs/${CONFIG} | jq
Layer contains packaged app:
LAYER=$(echo "${MANIFEST}" | jq --raw-output '.layers[0].digest')
curl -o - \
http://localhost:5000/v2/hello/blobs/${LAYER} | tar -tvz