goland 远程 debug

1.Install golang

Because my local machine golang version is 1.20.6, so I will install the same version on Alma8 Linux

mkdir -p /home/jalchu/golang
wget https://go.dev/dl/go1.20.6.linux-amd64.tar.gz
tar -zxvf go1.20.6.linux-amd64.tar.gz
vi ~/.bashrc (set environment like below)
source ~/.bashrc
go version
touch hello.go (a go test file)
go run -x hello.go
go build -x hello.go
GOTMPDIR=/home/jalchu go run -x hello.go (will set GOTMPDIR to env)

2.Install dlv

git clone https://github.com/go-delve/delve
cd delve
go install github.com/go-delve/delve/cmd/dlv
go install github.com/go-delve/delve/cmd/dlv@latest (go version > 1.16)
echo $GOPATH
ll /home/jalchu/golang/path/bin/dlv (dlv command is under $GOPATH) vi ~/.bashrc (export PATH=$PATH:/home/jalchu/golang/go/bin:/home/jalchu/golang/path/bin)

3.Start debug

git clone your code
go build -gcflags "all=-N -l" /home/jalchu/gotest/goflow/cmd/netflow/netflow.go
dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec ./netflow
dlv debug cmd/netflow/netflow.go --headless --listen=:9900 --api-version=2 (same as above 2 commands)
service iptables status
iptables -L -n
vi /etc/sysconfig/iptables
iptables -A INPUT -p tcp --dport 2345 -j ACCEPT
iptables -A OUTPUT -p tcp --sport 2345 -j ACCEPT
iptables -L -n | grep 2345
service iptables stop
code sync to linux server with GoLand Deployment
telnet ip port to judge whether you can connect to the linux server port
set remote debug from GoLand
export your env variables on linux server before you run the dlv, so that you can get the initial variable from your code

Reference

https://linux.how2shout.com/how-to-install-go-language-on-almalinux-or-rocky-linux-8-9/
https://almalinux.org/blog/almalinux-88-now-available/
https://groups.google.com/g/golang-nuts/c/4bJez8NPfXM?pli=1
https://github.com/go-delve/delve
https://golangforall.com/en/post/go-docker-delve-remote-debug.html

Issues:
Linux Alma8 go build(run) error：

[root@iany1zces0012 golang]# go build hello.go
go: error obtaining buildID for go tool compile: fork/exec /home/jalchu/golang/go/pkg/tool/linux_amd64/compile: operation not permitted

Fix：

1. vi /etc/fapolicyd/rules.d/80-allow-go.rules

allow perm=execute all : ftype=application/x-executable trust=0 exe=/opt/golang/go/bin/go

2. systemctl restart fapolicyd

3.vi ~/.bashrc

export GOROOT=/home/jalchu/golang/go
export GOPATH=/home/jalchu/golang/path
export GOTMPDIR=/home/jalchu/golang/tmp
export PATH=$PATH:/home/jalchu/golang/go/bin

go run 默认会在 tmp 下执行 tmp 目录没有执行权限 需要指定 GOTMPDIR

4.hello.go

package main

import "fmt"

func main(){
fmt.Printf("Hello world")
}

export GOROOT=/home/jalchu/golang/go
export GOPATH=/home/jalchu/golang/path
export GOTMPDIR=/home/jalchu/golang/tmp
export PATH=$PATH:/home/jalchu/golang/go/bin:/home/jalchu/golang/path/bin