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Dockerfile: enable building cgo dependencies #3865

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Dockerfile: enable building cgo dependencies #3865

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Dockerfile: enable building cgo dependencies
justadreamer Aug 16, 2024
3ee98ce
Dockerfile: add libatomic1 dependency to release part
justadreamer Aug 23, 2024
c98a532
doc compile and runtime dependencies
justadreamer Aug 27, 2024
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12 changes: 9 additions & 3 deletions Dockerfile
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Expand Up @@ -11,10 +11,14 @@ WORKDIR /app/prebid-server/
ENV GOROOT=/usr/local/go
ENV PATH=$GOROOT/bin:$PATH
ENV GOPROXY="https://proxy.golang.org"

# Installing gcc as cgo uses it to build native code of some modules
RUN apt-get update && \
apt-get install -y git && \
apt-get install -y git gcc && \
apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
ENV CGO_ENABLED 0

# CGO must be enabled because some modules depend on native C code
ENV CGO_ENABLED 1
COPY ./ ./
RUN go mod tidy
RUN go mod vendor
Expand All @@ -30,8 +34,10 @@ RUN chmod a+xr prebid-server
COPY static static/
COPY stored_requests/data stored_requests/data
RUN chmod -R a+r static/ stored_requests/data

# Installing libatomic1 as it is a runtime dependency for some modules
RUN apt-get update && \
apt-get install -y ca-certificates mtr && \
apt-get install -y ca-certificates mtr libatomic1 && \
apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
RUN adduser prebid_user
USER prebid_user
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5 changes: 5 additions & 0 deletions README.md
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Expand Up @@ -35,6 +35,11 @@ or compile a standalone binary using the command:
``` bash
go build .
```
**Note:** if building from source there are a couple dependencies to be aware of:
1. *Compile-time*. Some modules ship native code that requires `cgo` (comes with the `go` compiler) being enabled - by default it is and environment variable `CGO_ENABLED=1` do NOT set it to `0`.
2. *Compile-time*. `cgo` depends on the C-compiler, which usually is `gcc`, but can be changed by setting the value of `CC` env var, f.e. `CC=clang`. On ubuntu `gcc` can be installed via `sudo apt-get install gcc`.
3. *Runtime*. Some modules require `libatomic`. On ubuntu it is installed by running `sudo apt-get install libatomic1`. `libatomic1` is a dependency of `gcc`, so if you are building with `gcc` and running on the same machine, it is likely that `libatomic1` is already installed.

Ensure that you deploy the `/static` directory, as Prebid Server requires those files at startup.

## Developing
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