이더리움 클라이언트 Geth 설치하기 . 실행 환경 설정

나만의 블록체인을 만드는 게 목표입니다.
이더리움 소개는 구글링하면 자료가 많으니 생략합니다.

이더리움 클라이언트는
이더리움 블록체인 네트워크에 참여하는 노드(컴퓨터)입니다.

이더리움이 프로그램에서 어떻게 동작하는지 알아보기 위해
이더리움 클라이언트를 설치 한 후에 테스트 네트워크를 구축해서
채굴도 해보고 거래도 해볼거에요.

■ 이더리움 클라이언트 종류

클라이언트	개발 언어
go-ethereum (geth)	Go
Parity	Rust
cpp-ethereum	C++
pyethapp	Python
ethereumjs-lib	JavaScript
Ethereum(J)	Java

다양한 클라이언트 중에서 가장 많이 사용되는 go-ethereum (geth)를 선택했어요.

github 저장소에 있는 geth 소스를 다운로드합니다.

[root@localhost ~]# cd /usr/local [root@localhost ~]$ git clone https://github.com/ethereum/go-ethereum.git Cloning into 'go-ethereum'... remote: Enumerating objects: 102941, done. remote: Total 102941 (delta 0), reused 0 (delta 0), pack-reused 102941 Receiving objects: 100% (102941/102941), 170.97 MiB | 11.19 MiB/s, done. Resolving deltas: 100% (61452/61452), done. [root@localhost local]# ll total 4 drwxr-xr-x. 2 root root 18 Dec 3 03:00 bin drwxr-xr-x. 2 root root 6 Apr 11 2018 etc drwxr-xr-x. 2 root root 6 Apr 11 2018 games drwxr-xr-x. 10 root root 257 Nov 4 10:04 go drwxr-xr-x. 36 root root 4096 Dec 3 02:59 go-ethereum drwxr-xr-x. 2 root root 6 Apr 11 2018 include drwxr-xr-x. 2 root root 6 Apr 11 2018 lib drwxr-xr-x. 2 root root 6 Apr 11 2018 lib64 drwxr-xr-x. 2 root root 6 Apr 11 2018 libexec drwxr-xr-x. 2 root root 6 Apr 11 2018 sbin drwxr-xr-x. 5 root root 49 Nov 18 03:44 share drwxr-xr-x. 2 root root 6 Apr 11 2018 src

● geth 빌드하기

[root@localhost local]# cd go-ethereum [root@localhost go-ethereum]$ make geth env GO111MODULE=on go run build/ci.go install ./cmd/geth go: downloading github.com/cespare/cp v0.1.0 go: downloading github.com/Azure/azure-storage-blob-go v0.7.0 go: downloading golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2 go: downloading github.com/Azure/azure-pipeline-go v0.2.2 go: downloading github.com/mattn/go-ieproxy v0.0.0-20190702010315-6dee0af9227d >>> /usr/local/go/bin/go build -ldflags -X main.gitCommit=85064ed09b7243647ffd8c31a93c2abdbc3850d2 -X main.gitDate=20211202 -extldflags -Wl,-z,stack-size=0x800000 -trimpath -v -o /home/tmach/go-ethereum/build/bin/geth ./cmd/geth go: downloading github.com/jedisct1/go-minisign v0.0.0-20190909160543-45766022959e go: downloading github.com/naoina/toml v0.1.2-0.20170918210437-9fafd6967416 go: downloading gopkg.in/urfave/cli.v1 v1.20.0 go: downloading github.com/deckarep/golang-set v0.0.0-20180603214616-504e848d77ea go: downloading github.com/google/uuid v1.1.5 .. .. crypto/rand runtime/cgo # runtime/cgo cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in $PATH github.com/ethereum/go-ethereum/rlp github.com/ethereum/go-ethereum/params .. .. github.com/naoina/toml util.go:46: exit status 2 exit status 1 make: *** [geth] Error 1 ▶ 흑.. 빌드 에러가 발생하네요. 에러 내용을 보니 gcc가 설치 안되어 있거나 PATH가 안 잡혔네요. gcc 먼저 설치할게요.

● gcc 설치하기

[root@localhost ~]# yum list installed gcc Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.kakao.com * extras: mirror.kakao.com * updates: mirror.kakao.com Error: No matching Packages to list ▶ gcc 설치 안되어 있네요. ^^;; [root@localhost ~]# yum install gcc Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.kakao.com * extras: mirror.kakao.com * updates: mirror.kakao.com Resolving Dependencies --> Running transaction check ---> Package gcc.x86_64 0:4.8.5-44.el7 will be installed --> Processing Dependency: cpp = 4.8.5-44.el7 for package: gcc-4.8.5-44.el7.x86_64 --> Processing Dependency: glibc-devel >= 2.2.90-12 for package: gcc-4.8.5-44.el7.x86_64 --> Processing Dependency: libmpfr.so.4()(64bit) for package: gcc-4.8.5-44.el7.x86_64 --> Processing Dependency: libmpc.so.3()(64bit) for package: gcc-4.8.5-44.el7.x86_64 --> Running transaction check ---> Package cpp.x86_64 0:4.8.5-44.el7 will be installed ---> Package glibc-devel.x86_64 0:2.17-325.el7_9 will be installed --> Processing Dependency: glibc-headers = 2.17-325.el7_9 for package: glibc-devel-2.17-325.el7_9.x86_64 --> Processing Dependency: glibc = 2.17-325.el7_9 for package: glibc-devel-2.17-325.el7_9.x86_64 --> Processing Dependency: glibc-headers for package: glibc-devel-2.17-325.el7_9.x86_64 ---> Package libmpc.x86_64 0:1.0.1-3.el7 will be installed ---> Package mpfr.x86_64 0:3.1.1-4.el7 will be installed --> Running transaction check ---> Package glibc.x86_64 0:2.17-317.el7 will be updated --> Processing Dependency: glibc = 2.17-317.el7 for package: glibc-common-2.17-317.el7.x86_64 ---> Package glibc.x86_64 0:2.17-325.el7_9 will be an update ---> Package glibc-headers.x86_64 0:2.17-325.el7_9 will be installed --> Processing Dependency: kernel-headers >= 2.2.1 for package: glibc-headers-2.17-325.el7_9.x86_64 --> Processing Dependency: kernel-headers for package: glibc-headers-2.17-325.el7_9.x86_64 --> Running transaction check ---> Package glibc-common.x86_64 0:2.17-317.el7 will be updated ---> Package glibc-common.x86_64 0:2.17-325.el7_9 will be an update ---> Package kernel-headers.x86_64 0:3.10.0-1160.49.1.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ============================================================================== Package Arch Version Repository Size ============================================================================== Installing: gcc x86_64 4.8.5-44.el7 base 16 M Installing for dependencies: cpp x86_64 4.8.5-44.el7 base 5.9 M glibc-devel x86_64 2.17-325.el7_9 updates 1.1 M glibc-headers x86_64 2.17-325.el7_9 updates 691 k kernel-headers x86_64 3.10.0-1160.49.1.el7 updates 9.0 M libmpc x86_64 1.0.1-3.el7 base 51 k mpfr x86_64 3.1.1-4.el7 base 203 k Updating for dependencies: glibc x86_64 2.17-325.el7_9 updates 3.6 M glibc-common x86_64 2.17-325.el7_9 updates 12 M Transaction Summary ============================================================================= Install 1 Package (+6 Dependent packages) Upgrade ( 2 Dependent packages) Total download size: 48 M Is this ok [y/d/N]: y Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. (1/9): cpp-4.8.5-44.el7.x86_64.rpm | 5.9 MB 00:00:02 (2/9): glibc-2.17-325.el7_9.x86_64.rpm | 3.6 MB 00:00:02 (3/9): glibc-devel-2.17-325.el7_9.x86_64.rpm | 1.1 MB 00:00:00 (4/9): libmpc-1.0.1-3.el7.x86_64.rpm | 51 kB 00:00:00 (5/9): mpfr-3.1.1-4.el7.x86_64.rpm | 203 kB 00:00:00 (6/9): glibc-common-2.17-325.el7_9.x86_64.rpm | 12 MB 00:00:03 (7/9): glibc-headers-2.17-325.el7_9.x86_64.rpm | 691 kB 00:00:02 (8/9): kernel-headers-3.10.0-1160.49.1.el7.x86_64.rpm | 9.0 MB 00:00:02 (9/9): gcc-4.8.5-44.el7.x86_64.rpm | 16 MB 00:00:04 ------------------------------------------------------------------------------------------------------------------------------------ Total 9.8 MB/s | 48 MB 00:00:04 Running transaction check Running transaction test Transaction test succeeded Running transaction Updating : glibc-2.17-325.el7_9.x86_64 1/11 Updating : glibc-common-2.17-325.el7_9.x86_64 2/11 Installing : mpfr-3.1.1-4.el7.x86_64 3/11 Installing : libmpc-1.0.1-3.el7.x86_64 4/11 Installing : cpp-4.8.5-44.el7.x86_64 5/11 Installing : kernel-headers-3.10.0-1160.49.1.el7.x86_64 6/11 Installing : glibc-headers-2.17-325.el7_9.x86_64 7/11 Installing : glibc-devel-2.17-325.el7_9.x86_64 8/11 Installing : gcc-4.8.5-44.el7.x86_64 9/11 Cleanup : glibc-2.17-317.el7.x86_64 10/11 Cleanup : glibc-common-2.17-317.el7.x86_64 11/11 Verifying : mpfr-3.1.1-4.el7.x86_64 1/11 Verifying : glibc-devel-2.17-325.el7_9.x86_64 2/11 Verifying : gcc-4.8.5-44.el7.x86_64 3/11 Verifying : glibc-headers-2.17-325.el7_9.x86_64 4/11 Verifying : kernel-headers-3.10.0-1160.49.1.el7.x86_64 5/11 Verifying : libmpc-1.0.1-3.el7.x86_64 6/11 Verifying : glibc-common-2.17-325.el7_9.x86_64 7/11 Verifying : glibc-2.17-325.el7_9.x86_64 8/11 Verifying : cpp-4.8.5-44.el7.x86_64 9/11 Verifying : glibc-2.17-317.el7.x86_64 10/11 Verifying : glibc-common-2.17-317.el7.x86_64 11/11 Installed: gcc.x86_64 0:4.8.5-44.el7 Dependency Installed: cpp.x86_64 0:4.8.5-44.el7 glibc-devel.x86_64 0:2.17-325.el7_9 glibc-headers.x86_64 0:2.17-325.el7_9 kernel-headers.x86_64 0:3.10.0-1160.49.1.el7 libmpc.x86_64 0:1.0.1-3.el7 mpfr.x86_64 0:3.1.1-4.el7 Dependency Updated: glibc.x86_64 0:2.17-325.el7_9 glibc-common.x86_64 0:2.17-325.el7_9 Complete! ▶ 버전 확인 [root@localhost ~]# gcc --version gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44) Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

● 다시 geth 빌드하기

[root@localhost ~]# cd /usr/local/go-ethereum [root@localhost go-ethereum]$ make geth env GO111MODULE=on go run build/ci.go install ./cmd/geth >>> /usr/local/go/bin/go build -ldflags -X main.gitCommit=85064ed09b7243647ffd8c31a93c2abdbc3850d2 -X main.gitDate=20211202 -extldflags -Wl,-z,stack-size=0x800000 -trimpath -v -o /home/tmach/go-ethereum/build/bin/geth ./cmd/geth runtime/cgo github.com/ethereum/go-ethereum/crypto/secp256k1 github.com/ethereum/go-ethereum/crypto github.com/ethereum/go-ethereum/core/types .. github.com/ethereum/go-ethereum/eth/tracers/js github.com/ethereum/go-ethereum/eth/tracers/native github.com/ethereum/go-ethereum/cmd/geth Done building. Run "./build/bin/geth" to launch geth. ▶ 에러 없이 빌드가 정상이네요. 휴~~

● PATH 잡아주기

모든 계정이 geth를 다 사용할수 있게 공통PATH를 잡아줍니다. 아래 공통PATH 입니다. /usr/local/bin /usr/bin /usr/local/sbin /usr/sbin 공통PATH 디렉터리안에 실행파일을 넣어두시면 모든 계정이 다 사용할수 있습니다. 저는 /usr/local/bin 로 정할게요. [root@localhost bin]# pwd /usr/local/go-ethereum/build/bin [root@localhost bin]# ll total 43292 -rwxr-xr-x. 1 root root 44329992 Dec 3 02:59 geth [root@localhost bin]# cp geth /usr/local/bin [root@localhost bin]# cd /usr/local/bin [root@localhost bin]# ll total 43292 -rwxr-xr-x. 1 root root 44329992 Dec 3 03:00 geth ▶ tmach 계정에 PATH를 잡아주지 않았는데요. geth명령어 실행이 되죠. [tmach@localhost ~]$ geth version Geth Version: 1.10.14-unstable Git Commit: 85064ed09b7243647ffd8c31a93c2abdbc3850d2 Git Commit Date: 20211202 Architecture: amd64 Go Version: go1.17.3 Operating System: linux GOPATH= GOROOT=go

감사합니다.