Dockerfile and docker compose

[wiktormalyska]

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Hi i'm trying to contribute by creating Dockerfile and docker-compose

I ran into unfamiliar issue

Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "xcaddy": executable file not found in $PATH: unknown

Dockerfile

FROM alpine:3.20

# Install the necessary packages for xcaddy
RUN apk update && apk add --no-cache \
    curl \
    git \
    go \
    gcc \
    musl-dev \
    libc-dev \
    openssl \
    bash \
    ca-certificates

# Install xcaddy
RUN go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest

# Verify installation
RUN /root/go/bin/xcaddy version

CMD ["xcaddy", "help"]

docker-compose.yml

    xcaddy:
        container_name: xcaddy
        build: .
        restart: unless-stopped
        ports:
# temporary ports
          - "180:80"
          - "1443:443"
        volumes:
          - ./Caddyfile:/etc/caddy/Caddyfile
          - caddy_data:/data
          - caddy_config:/config
          - ./caddylogs:/var/log/caddy
        environment:
          - [email protected]
        networks:
          - xcaddy
volumes:
    caddy_data:
    caddy_config:
    caddylogs:
networks:
    xcaddy:
        external: true```

[francislavoie]

Use our builder image instead: https://caddyserver.com/docs/build#docker

[wiktormalyska]

Nice to know that, I will check out it later 👍

[forgetso]

When I use the builder image I get errors like

35.17 2024/11/06 22:02:32 [INFO] exec (timeout=0s): /usr/local/go/bin/go build -o /usr/bin/caddy -ldflags -w -s -trimpath -tags nobadger 
70.81 # github.com/google/gopacket/pcap
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:30:22: undefined: pcapErrorNotActivated
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:52:17: undefined: pcapTPtr
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:64:10: undefined: pcapPkthdr
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:103:6: undefined: pcapBpfProgram
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:110:7: undefined: pcapPkthdr
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:268:33: undefined: pcapErrorActivated
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:269:33: undefined: pcapWarningPromisc
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:270:33: undefined: pcapErrorNoSuchDevice
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:271:33: undefined: pcapErrorDenied
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:748:14: undefined: pcapTPtr
70.81 /go/pkg/mod/github.com/google/[email protected]/pcap/pcap.go:271:33: too many errors
74.00 2024/11/06 22:03:10 [INFO] Skipping cleanup as requested; leaving folder intact: /tmp/buildenv_2024-11-06-2201.858105741
74.00 2024/11/06 22:03:10 [FATAL] exit status 1

So I add CGO_ENABLED=1 flag

34.43 2024/11/06 22:09:09 [INFO] exec (timeout=0s): /usr/local/go/bin/go build -o /usr/bin/caddy -ldflags -w -s -trimpath -tags nobadger 
38.76 # runtime/cgo
38.76 cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in $PATH

So I add gcc and then:

33.22 2024/11/06 22:10:35 [INFO] exec (timeout=0s): /usr/local/go/bin/go build -o /usr/bin/caddy -ldflags -w -s -trimpath -tags nobadger 
37.56 # runtime/cgo
37.56 _cgo_export.c:3:10: fatal error: stdlib.h: No such file or directory
37.56     3 | #include <stdlib.h>
37.56       |          ^~~~~~~~~~
37.56 compilation terminated.

Docker file looks like this:

FROM caddy:2-builder AS builder
RUN apk update && apk add gcc
RUN CGO_ENABLED=1 xcaddy build \
    --with github.com/mholt/caddy-ratelimit \
    --with github.com/rushiiMachine/caddy-ja3

FROM caddy:2

COPY --from=builder /usr/bin/caddy /usr/bin/caddy

[forgetso]

For anyone with similar problems, you can install all the deps and then it will work:

FROM caddy:2-builder AS builder
RUN apk update && apk add gcc g++ make libpcap-dev libpcap
RUN CGO_ENABLED=1 xcaddy build \
    --with github.com/mholt/caddy-ratelimit \
    --with github.com/rushiiMachine/caddy-ja3

FROM caddy:2
RUN apk update && apk add libpcap
COPY --from=builder /usr/bin/caddy /usr/bin/caddy

[mohammed90]

@forgetso, in your case, the dependency github.com/rushiiMachine/caddy-ja3 has a transitive dependency that requires C, thus consequently CGO. Your final approach to install C toolchain is per expectations when CGO is involved.

I don't there's anything actionable in this issue. I'll close it, but feel free to correct my impression.

[forgetso]

Yeah no worries, no actionable points. Was just leaving this info here for search purposes.