Я использую dlv внутри alpine: 3.7.1 контейнер. Вылетает с этой ошибкой:
/ # /dlv --listen=:40000 --headless=true --api-version=2 exec /server
Could not create config directory: user: Current not implemented on linux/amd64.panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x50 pc=0x8c7dca]
goroutine 1 [running]:
github.com/derekparker/delve/cmd/dlv/cmds.execute(0x0, 0xc420057a00, 0x1, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0)
/go/src/github.com/derekparker/delve/cmd/dlv/cmds/commands.go:575 +0x3aa
github.com/derekparker/delve/cmd/dlv/cmds.New.func4(0xc42014a000, 0xc420057a00, 0x1, 0x4)
/go/src/github.com/derekparker/delve/cmd/dlv/cmds/commands.go:182 +0x65
github.com/derekparker/delve/vendor/github.com/spf13/cobra.(*Command).execute(0xc42014a000, 0xc42001c6c0, 0x4, 0x6, 0xc42014a000, 0xc42001c6c0)
/go/src/github.com/derekparker/delve/vendor/github.com/spf13/cobra/command.go:647 +0x237
github.com/derekparker/delve/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc4200d1680, 0xc4200d1d40, 0xc4200d1b00, 0xc4200d18c0)
/go/src/github.com/derekparker/delve/vendor/github.com/spf13/cobra/command.go:733 +0x2d4
github.com/derekparker/delve/vendor/github.com/spf13/cobra.(*Command).Execute(0xc4200d1680, 0xc4200d1680, 0x9fad07)
/go/src/github.com/derekparker/delve/vendor/github.com/spf13/cobra/command.go:692 +0x2b
main.main()
/go/src/github.com/derekparker/delve/cmd/dlv/main.go:24 +0xe4
Мой Dockerfile:
# Compile stage
FROM golang:1.10.1-alpine3.7 AS build-env
ENV CGO_ENABLED 0
ADD . /go/src/hello
# The -gcflags "all=-N -l" flag helps us get a better debug experience
#RUN go build -x -gcflags "all=-N -l" -o /server hello
RUN go build -gcflags "all=-N -l" -o /server hello
# Compile Delve
RUN apk add --no-cache git
RUN go get github.com/derekparker/delve/cmd/dlv
# Final stage
FROM alpine:3.7
# Port 8080 belongs to our application, 40000 belongs to Delve
EXPOSE 8080 40000
# Allow delve to run on Alpine based containers.
RUN apk add --no-cache libc6-compat
WORKDIR /
COPY --from=build-env /server /
COPY --from=build-env /go/bin/dlv /
# Run delve
#CMD ["/dlv", "--listen=:40000", "--headless=true", "--api-version=2", "exec", "/server"]
#/dlv --listen=:40000 --headless=true --api-version=2 exec /server
CMD ["/bin/sh"]
Я запускаю контейнер как:
$ docker run -p 8080:8080 -p 40000:40000 --name hello-go-delve3 --cap-add SYS_PTRACE --security-opt apparmor=unconfined
Сервер запускается нормально и обслуживает запросы, если я запускаю его без delve.
# /server
2018/11/09 01:13:18 starting server...
Ниже приведена дополнительная отладка, если это поможет.
# /dlv version
Could not create config directory: user: Current not implemented on linux/amd64.Delve Debugger
Version: 1.1.0
Build: $Id: 1990ba12450cab9425a2ae62e6ab988725023d5c $
# uname -a
Linux 168365401d8d 4.9.93-linuxkit-aufs #1 SMP Wed Jun 6 16:55:56 UTC 2018 x86_64 Linux
# cat /etc/alpine-release
3.7.1
Я получаю аналогичный segfault из / dlv, если я запускаю / server в фоновом режиме, а затем присоединяюсь к нему из / dlv:
# /server &
2018/11/09 01:25:02 starting server...
# ps
PID USER TIME COMMAND
1 root 0:00 /bin/sh
21 root 0:00 /server
24 root 0:00 ps
# /dlv --listen=:40000 --headless=true --api-version=2 attach 21
Could not create config directory: user: Current not implemented on linux/amd64.panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x50 pc=0x8c7dca]
goroutine 1 [running]:
github.com/derekparker/delve/cmd/dlv/cmds.execute(0x15, 0xc420057a50, 0x0, 0x3, 0x0, 0x0, 0x0, 0x3, 0x0)
/go/src/github.com/derekparker/delve/cmd/dlv/cmds/commands.go:575 +0x3aa
github.com/derekparker/delve/cmd/dlv/cmds.attachCmd(0xc4200d18c0, 0xc420057a40, 0x1, 0x4)
/go/src/github.com/derekparker/delve/cmd/dlv/cmds/commands.go:469 +0xc2
github.com/derekparker/delve/vendor/github.com/spf13/cobra.(*Command).execute(0xc4200d18c0, 0xc42001c660, 0x4, 0x6, 0xc4200d18c0, 0xc42001c660)
/go/src/github.com/derekparker/delve/vendor/github.com/spf13/cobra/command.go:647 +0x237
github.com/derekparker/delve/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0xc4200d1680, 0xc4200d1d40, 0xc4200d1b00, 0xc4200d18c0)
/go/src/github.com/derekparker/delve/vendor/github.com/spf13/cobra/command.go:733 +0x2d4
github.com/derekparker/delve/vendor/github.com/spf13/cobra.(*Command).Execute(0xc4200d1680, 0xc4200d1680, 0x9fad07)
/go/src/github.com/derekparker/delve/vendor/github.com/spf13/cobra/command.go:692 +0x2b
main.main()
/go/src/github.com/derekparker/delve/cmd/dlv/main.go:24 +0xe4
Сегодня все работало нормально. Не уверен, что я изменил. Любые указатели будут полезны. Спасибо.