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Refactor run-nodered script #816

Merged
merged 10 commits into from
Oct 30, 2024
Merged

Refactor run-nodered script #816

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c6e6508
Refactor run-nodered script
andistorm Aug 6, 2024
d3a67c0
Add comments to the nodered script
andistorm Oct 7, 2024
439cfa1
Use debian:12-slim as temporarily container image
andistorm Oct 8, 2024
d18da86
Merge branch 'main' into refactor/run-nodered-script
andistorm Oct 8, 2024
796e0e1
update tag
andistorm Oct 21, 2024
ed71995
Add prefix
andistorm Oct 21, 2024
d7ddd8d
Merge branch 'main' into refactor/run-nodered-script
andistorm Oct 21, 2024
14ca168
set group and owner of docker volume
andistorm Oct 28, 2024
3de153e
Merge branch 'main' into refactor/run-nodered-script
andistorm Oct 28, 2024
e82d5ad
Merge branch 'main' into refactor/run-nodered-script
Pietfried Oct 30, 2024
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6 changes: 0 additions & 6 deletions CMakeLists.txt
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Expand Up @@ -129,12 +129,6 @@ endif()
# FIXME (aw): this should be optional
add_subdirectory(config)

# install docker related files
install(
DIRECTORY "cmake/assets/docker"
DESTINATION "${CMAKE_INSTALL_DATADIR}/everest"
)

ev_install_project()

# configure clang-tidy if requested
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5 changes: 0 additions & 5 deletions cmake/assets/docker/Dockerfile
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20 changes: 17 additions & 3 deletions cmake/assets/run_nodered_template.sh.in
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Original file line number Diff line number Diff line change
@@ -1,3 +1,17 @@
cd @EVEREST_DOCKER_DIR@
docker build -t everest-nodered .
docker run --rm --network host --name everest_nodered --mount type=bind,source=@FLOW_FILE@,target=/data/flows.json everest-nodered
# In the following a volume is created to contain the nodered config, this is done to
# allow starting the nodered container from inside a devcontainer

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Why does using a volume allow to start the node-red container from inside a dev container?

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The workspace inside the devcontainer is mounted to an other path. So you would need to know about the host path of the flow file.

docker run is executed on host with host paths

docker cp is executed with container's paths

This way it is possible to copy a file with only knowing the devcontainer paths into a docker volume which then can be mounted by name into the nodered container

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I see, well this is really ugly. These docker inside docker scenarios are quite special, not sure whether we should support these - they might break quite easily. This script here basically only works, if the devcontainer has been launched correctly - which is an assumption I wouldn't necessarily make.
Does this script work, when executed from the host (i.e. outside of the container?)

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It is not real docker inside docker, because it is more like remote controlling the hosts docker socket.
This script is designed to work inside and outside the devcontainer. Of course it needs to be rebuild when changed because of paths

# Create docker volume to contain nodered config
docker volume create everest-nodered-config-volume

# Create temporarily container to copy nodered config into the created volume
docker run --name everest-nodered-config-container -v everest-nodered-config-volume:/data debian:12-slim chown -R 1000:1000 /data

# Copy nodered config to the created volume with the temporarily created container
docker cp @FLOW_FILE@ everest-nodered-config-container:/data/flows.json

# Remove temporarily container
docker rm everest-nodered-config-container

# Start nodered container with the volume mounted to /data
docker run --rm --network host --name everest_nodered --mount type=volume,source=everest-nodered-config-volume,target=/data ghcr.io/everest/everest-dev-environment/nodered:docker-images-v0.1.0
3 changes: 0 additions & 3 deletions cmake/config-run-nodered-script.cmake
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Expand Up @@ -32,9 +32,6 @@ function(generate_nodered_run_script)
set(SCRIPT_OUTPUT_FILE "${SCRIPT_OUTPUT_PATH}/nodered-${OPTNS_OUTPUT}.sh")
endif()

# other necessary variables
set(EVEREST_DOCKER_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/everest/docker")

configure_file("${EVEREST_CONFIG_ASSET_DIR}/run_nodered_template.sh.in" ${SCRIPT_OUTPUT_FILE})

endfunction()
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