5a1d4bff62
This adds support to loading artifacts (e.g. docker.#Build,
os.#Container, ...) into any arbitrary docker engine (through a
dagger.#Stream for UNIX sockets or SSH for a remote engine)
Implementation:
- Add op.#SaveImage which serializes an artifact into an arbitrary path
(docker tarball format)
- Add docker.#Load which uses op.#SaveImage to serialize to disk and
executes `docker load` to load it back
Caveats: Because we're doing this in userspace rather than letting
dagger itself load the image, the performance is pretty bad.
The buildkit API is meant for streaming (get a stream of a docker image
pipe it into docker load). Because of userspace, we have to load the
entire docker image into memory, then serialize it in a single WriteFile
LLB operation.
Example:
```cue
package main
import (
"alpha.dagger.io/dagger"
"alpha.dagger.io/docker"
)
source: dagger.#Input & dagger.#Artifact
dockersocket: dagger.#Input & dagger.#Stream
build: docker.#Build & {
"source": source
}
load: docker.#Load & {
source: build
tag: "testimage"
socket: dockersocket
}
```
Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>
109 lines
4.0 KiB
Markdown
109 lines
4.0 KiB
Markdown
---
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sidebar_label: docker
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---
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# alpha.dagger.io/docker
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Docker container operations
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```cue
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import "alpha.dagger.io/docker"
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```
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## docker.#Build
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Build a Docker image from source
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### docker.#Build Inputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*source* | `dagger.#Artifact` |Build context |
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|*dockerfile* | `*null \| string` |Dockerfile passed as a string |
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### docker.#Build Outputs
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_No output._
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## docker.#Command
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A container image that can run any docker command
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### docker.#Command Inputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*command* | `string` |Command to execute |
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|*registries* | `[]` |Image registries |
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### docker.#Command Outputs
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_No output._
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## docker.#Load
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Load a docker image into a docker engine
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### docker.#Load Inputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*tag* | `string` |Name and optionally a tag in the 'name:tag' format |
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|*source* | `dagger.#Artifact` |Image source |
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|*load.command* | `"docker load -i /src/image.tar"` |Command to execute |
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|*load.registries* | `[]` |Image registries |
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### docker.#Load Outputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*ref* | `string` |Image ref |
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|*digest* | `string` |Image digest |
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## docker.#Pull
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Pull a docker container
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### docker.#Pull Inputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*from* | `string` |Remote ref (example: "index.docker.io/alpine:latest") |
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### docker.#Pull Outputs
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_No output._
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## docker.#Push
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Push a docker image to a remote registry
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### docker.#Push Inputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*target* | `string` |Remote target (example: "index.docker.io/alpine:latest") |
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|*source* | `dagger.#Artifact` |Image source |
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### docker.#Push Outputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*ref* | `string` |Image ref |
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|*digest* | `string` |Image digest |
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## docker.#Run
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### docker.#Run Inputs
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*ref* | `string` |Image reference (e.g: nginx:alpine) |
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|*run.command* | `"""\n # Run detach container\n OPTS=""\n \n if [ ! -z "$CONTAINER_NAME" ]; then\n \tOPTS="$OPTS --name $CONTAINER_NAME"\n fi\n \n if [ ! -z "$CONTAINER_PORTS" ]; then\n \tOPTS="$OPTS -p $CONTAINER_PORTS"\n fi\n \n docker container run -d $OPTS "$IMAGE_REF"\n """` |Command to execute |
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|*run.env.IMAGE_REF* | `string` |- |
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|*run.registries* | `[]` |Image registries |
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### docker.#Run Outputs
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_No output._
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