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go run filling up /tmp folder on Linux (Fedora 40) #68094

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ad-on-is opened this issue Jun 20, 2024 · 3 comments
Closed

go run filling up /tmp folder on Linux (Fedora 40) #68094

ad-on-is opened this issue Jun 20, 2024 · 3 comments

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@ad-on-is
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ad-on-is commented Jun 20, 2024 •
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Go version

go version go1.22.4 linux/amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/home/adonis/.cache/go-build'
GOENV='/home/adonis/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/home/adonis/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/home/adonis/go'
GOPRIVATE=''
GOPROXY='direct'
GOROOT='/usr/lib/golang'
GOSUMDB='off'
GOTMPDIR=''
GOTOOLCHAIN='local'
GOTOOLDIR='/usr/lib/golang/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/dev/null'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2427802048=/tmp/go-build -gno-record-gcc-switches'

What did you do?

I'm running a script that watches for file changes, and then executes go run main.go

watchexec -r -e go -- go run main.go serve --http 0.0.0.0:8090

Obviously since this builds and runs multiple times, go seems to create a new folder under /tmp/go-buildxxxxx storing the built executable, which in my case has 32MB

What did you see happen?

This results in an accumulation of unnecessary go-buildxxxx folders overfilling tmpfs volume on Fedora 40.

$: df -h
Filesystem                                       Size  Used Avail Use% Mounted on
tmpfs                                             16G   16G   0G   100% /tmp

Deleting all go-build* folders from /tmp brings /tmp down to 1% in my case.

What did you expect to see?

go run should not create multiple /tmp/go-buildxxxx folders when executing the build command multiple times within the same project. Or it should at least clean them up when the process is terminated.
@gabyhelp
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(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)

@seankhliao
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go run does clean up directories if given the opportunity, you should probably be using a signal like SIGINT. see also #40467

Closing as an issue with third party tooling.

@seankhliao seankhliao closed this as not planned Won't fix, can't repro, duplicate, stale Jun 20, 2024
@ad-on-is
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@seankhliao Thx... I did some more investigation, and adding SIGINT to the command solves the issue indeed.

watchexec -r -e go --stop-signal SIGINT -- go run main.go

@gabyhelp gabyhelp mentioned this issue Aug 14, 2024
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@ad-on-is @seankhliao @gabyhelp