Docker build fails: GCC missing

[cwchristerw]

Sending build context to Docker daemon  1.857MB
Step 1/11 : FROM docker.io/golang:alpine as builder
alpine: Pulling from library/golang
4fe2ade4980c: Already exists 
2e793f0ebe8a: Pull complete 
77995fba1918: Pull complete 
6b343150750a: Pull complete 
517b41dec3aa: Pull complete 
Digest: sha256:c2c6c46c11319fd458a42aa3fc3b45e16bacb49e3f33f1e2a783f0122a9d8471
Status: Downloaded newer image for golang:alpine
 ---> c283ac5a8f78
Step 2/11 : COPY . /src
 ---> cf9ea15c0cb2
Step 3/11 : WORKDIR /src
 ---> Running in dc146e239edb
Removing intermediate container dc146e239edb
 ---> dc31857e35f0
Step 4/11 : RUN apk add git && ./build
 ---> Running in 233c86601e75
fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/community/x86_64/APKINDEX.tar.gz
(1/6) Installing nghttp2-libs (1.32.0-r0)
(2/6) Installing libssh2 (1.8.0-r3)
(3/6) Installing libcurl (7.61.1-r1)
(4/6) Installing expat (2.2.5-r0)
(5/6) Installing pcre2 (10.31-r0)
(6/6) Installing git (2.18.1-r0)
Executing busybox-1.28.4-r1.trigger
OK: 19 MiB in 20 packages
Building: yggdrasil
Fetching https://golang.org/x/crypto?go-get=1
Fetching https://golang.org/x/net?go-get=1
Fetching https://golang.org/x/text?go-get=1
Fetching https://golang.org/x/sys?go-get=1
go: finding github.com/kardianos/minwinsvc v0.0.0-20151122163309-cad6b2b879b0
go: finding github.com/neilalexander/hjson-go v0.0.0-20180509131856-23267a251165
go: finding github.com/docker/libcontainer v2.2.1+incompatible
go: finding github.com/mitchellh/mapstructure v1.1.2
go: finding github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091
go: finding github.com/yggdrasil-network/water v0.0.0-20180615095340-f732c88f34ae
Parsing meta tags from https://golang.org/x/sys?go-get=1 (status code 200)
get "golang.org/x/sys": found meta tag get.metaImport{Prefix:"golang.org/x/sys", VCS:"git", RepoRoot:"https://go.googlesource.com/sys"} at https://golang.org/x/sys?go-get=1
Parsing meta tags from https://golang.org/x/crypto?go-get=1 (status code 200)
Parsing meta tags from https://golang.org/x/net?go-get=1 (status code 200)
get "golang.org/x/crypto": found meta tag get.metaImport{Prefix:"golang.org/x/crypto", VCS:"git", RepoRoot:"https://go.googlesource.com/crypto"} at https://golang.org/x/crypto?go-get=1
get "golang.org/x/net": found meta tag get.metaImport{Prefix:"golang.org/x/net", VCS:"git", RepoRoot:"https://go.googlesource.com/net"} at https://golang.org/x/net?go-get=1
go: finding golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e
go: finding golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9
go: finding golang.org/x/net v0.0.0-20181207154023-610586996380
Parsing meta tags from https://golang.org/x/text?go-get=1 (status code 200)
get "golang.org/x/text": found meta tag get.metaImport{Prefix:"golang.org/x/text", VCS:"git", RepoRoot:"https://go.googlesource.com/text"} at https://golang.org/x/text?go-get=1
go: finding golang.org/x/text v0.3.0
go: downloading github.com/mitchellh/mapstructure v1.1.2
go: downloading golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9
go: downloading github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091
go: downloading github.com/kardianos/minwinsvc v0.0.0-20151122163309-cad6b2b879b0
go: downloading golang.org/x/text v0.3.0
go: downloading golang.org/x/net v0.0.0-20181207154023-610586996380
go: downloading golang.org/x/sys v0.0.0-20181206074257-70b957f3b65e
go: downloading github.com/yggdrasil-network/water v0.0.0-20180615095340-f732c88f34ae
go: downloading github.com/docker/libcontainer v2.2.1+incompatible
go: downloading github.com/neilalexander/hjson-go v0.0.0-20180509131856-23267a251165
github.com/kardianos/minwinsvc
golang_org/x/net/dns/dnsmessage
github.com/yggdrasil-network/yggdrasil-go/src/config
github.com/neilalexander/hjson-go
github.com/yggdrasil-network/yggdrasil-go/src/defaults
github.com/yggdrasil-network/water
golang.org/x/crypto/ed25519/internal/edwards25519
golang.org/x/crypto/curve25519
golang.org/x/crypto/internal/subtle
golang.org/x/crypto/poly1305
net
golang.org/x/crypto/ed25519
# net
exec: "gcc": executable file not found in $PATH
golang.org/x/crypto/salsa20/salsa
golang.org/x/net/internal/iana
golang.org/x/net/bpf
golang.org/x/text/encoding/internal/identifier
golang.org/x/text/transform
golang.org/x/crypto/nacl/secretbox
golang.org/x/text/internal/utf8internal
golang.org/x/crypto/nacl/box
golang.org/x/text/encoding
golang.org/x/text/runes
golang.org/x/text/encoding/internal
golang.org/x/text/encoding/unicode
Building: yggdrasilctl
net
# net
exec: "gcc": executable file not found in $PATH
Removing intermediate container 233c86601e75
 ---> ee4a9e848da0
Step 5/11 : FROM docker.io/alpine
 ---> 11cd0b38bc3c
Step 6/11 : LABEL maintainer="Christer Waren/CWINFO <christer.waren@cwinfo.org>"
 ---> Running in b81b1895d3e4
Removing intermediate container b81b1895d3e4
 ---> 98d0d93df1d1
Step 7/11 : COPY --from=builder /src/yggdrasil /usr/bin/yggdrasil
COPY failed: stat /var/lib/docker/overlay2/77c4f922b88880a5e7bc391f1b4827f93ba3c9a1c1476e5c6af7c1ed8a053441/merged/src/yggdrasil: no such file or directory

[neilalexander]

I guess the crux of this issue is:

exec: "gcc": executable file not found in $PATH

GCC is not present?

[jcgruenhage]

Yeah, since when do we need gcc though?

[neilalexander]

I suspect this is related to golang/go#26988 somehow - we are using Go 1.11 modules now, so it looks like the problem is potentially in linking against the native network stack.

Potential solution appears to be specifying CGO_ENABLED=0 at build time.

[cwchristerw]

I can make tests and create PR to develop before next release gets pulled from develop branch

[cwchristerw]

I suspect this is related to golang/go#26988 somehow - we are using Go 1.11 modules now, so it looks like the problem is potentially in linking against the native network stack.

Potential solution appears to be specifying CGO_ENABLED=0 at build time.

Is it environment variable?

[neilalexander]

Yes - something like CGO_ENABLED=0 ./build should do the trick.

[cwchristerw]

Build OK, network NOT with that change because my laptop network went down for some reason. Try again if still goes I'm going to try installing gcc and compare results 😄 Don't know command that I can use to check network traffic during test

[jcgruenhage]

If we compile it with cgo, we don't get proper static binaries though, they'll have c libraries as dependencies.

[cwchristerw]

Now it works but will have to test few minutes though

[neilalexander]

@jcgruenhage

Right - so we have more flags we can give to build as per #235. Also see #244 on really static.