custom-plugin

README

Build image and plugin

Use musl-libc build image and plugin

Because the default vc-scheduler base image is alpine, which only has musl-libc, so we should use musl-gcc to build the plugin.

Build the image and plugin in Docker(Recommended):

Please run this command at the root path of the project.

docker build -t volcanosh/vc-scheduler:custom-plugins -f example/custom-plugin/Dockerfile .

And then replace the image and set --plugins-dir=plugins parameter in vc-scheduler deployment yaml file.

Build the image and plugin locally:

Please run this command at the root path of the project.

# install musl
wget http://musl.libc.org/releases/musl-latest.tar.gz
mkdir musl-latest && tar -xf musl-latest.tar.gz -C musl-latest --strip-components=1 && cd musl-latest
./configure
make && sudo make install

# build plugin .so file
CC=/usr/local/musl/bin/musl-gcc CGO_ENABLED=1 go build -buildmode=plugin -ldflags '-linkmode=external' \
    -o example/custom-plugin/magic.so example/custom-plugin/magic.go

# build vc scheduler binary
SUPPORT_PLUGINS=yes make vc-scheduler
cat << EOF > Dockerfile
FROM alpine:latest
COPY _output/bin/vc-scheduler /vc-scheduler
COPY example/custom-plugin/magic.so /plugins/magic.so
ENTRYPOINT ["/vc-scheduler"]
EOF

# build vc scheduler image
docker build -t volcanosh/vc-scheduler:custom-plugins .

And then replace the image and set --plugins-dir=plugins parameter in vc-scheduler deployment yaml file.

Use gnu-libc build plugin

If you want to use ubuntu as base image, you can use gnu-libc to build the plugin. Since most Linux OS have gnu-libc, you can just build the plugin in local.

# default CC is gcc
CGO_ENABLED=1 go build -buildmode=plugin magic.go