编译postgres exporter遇到的问题该如何解决，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
在编译prometheus的postgres exporter时，遇到了以下错误：
[parallels@centos7 postgres_exporter]$ go run mage.go binary go: finding github.com/magefile/mage v1.10.0 go: downloading github.com/magefile/mage v1.10.0 go: extracting github.com/magefile/mage v1.10.0 Error determining list of magefiles: failed to list non-mage gofiles: exit status 1: go: cannot find main module, but found vendor/vendor.json in /home/parallels/Go/src/postgres_exporter to create a module there, run: go mod init exit status 1
经过调查，发现是之前配置的go mod环境变量导致的编译失败，具体原因还有待研究。
于是手工通过关闭GO111MODULE环境变量编译成功，如下：
[parallels@centos7 postgres_exporter]$ export GO111MODULE=off [parallels@centos7 postgres_exporter]$ go run mage.go binary 2020/09/15 01:17:33 exec: git rev-parse --abbrev-ref HEAD 2020/09/15 01:17:33 exec: git rev-parse HEAD 2020/09/15 01:17:33 exec: git describe --dirty 2020/09/15 01:17:33 exec: git describe --abbrev=0 2020/09/15 01:17:34 exec: go list ./... golang.org/x/tools/cover github.com/pelletier/go-buffruneio github.com/google/shlex github.com/mattn/goveralls github.com/nicksnyder/go-i18n/i18n/language github.com/alecthomas/units github.com/nicksnyder/go-i18n/i18n/translation github.com/pelletier/go-toml gopkg.in/yaml.v2 github.com/nicksnyder/go-i18n/i18n/bundle github.com/nicksnyder/go-i18n/i18n Finished 1 of 6 gopkg.in/alecthomas/kingpin.v3-unstable github.com/alecthomas/gometalinter github.com/kardianos/govendor/prompt golang.org/x/sys/unix github.com/dchest/safefile github.com/kardianos/govendor/internal/pathos github.com/Bowery/prompt github.com/kardianos/govendor/internal/vos github.com/kardianos/govendor/cliprompt github.com/kardianos/govendor/internal/vfilepath github.com/kardianos/govendor/pkgspec github.com/kardianos/govendor/vendorfile github.com/kardianos/govendor/vcs github.com/pkg/errors golang.org/x/tools/go/vcs Finished 2 of 6 github.com/kardianos/govendor/context github.com/wadey/gocovmerge github.com/kardianos/govendor/migrate Finished 3 of 6 github.com/kardianos/govendor/help github.com/kardianos/govendor/run github.com/kardianos/govendor github.com/tmthrgd/go-bindata/internal/identifier github.com/tmthrgd/go-bindata github.com/tmthrgd/go-bindata/go-bindata Finished 4 of 6 Finished 5 of 6 github.com/nbutton23/zxcvbn-go/match golang.org/x/tools/go/ast/astutil golang.org/x/tools/go/buildutil golang.org/x/tools/go/loader github.com/nbutton23/zxcvbn-go/data github.com/GoASTScanner/gas github.com/nbutton23/zxcvbn-go/adjacency github.com/GoASTScanner/gas/output github.com/nbutton23/zxcvbn-go/utils/math github.com/nbutton23/zxcvbn-go/entropy github.com/nbutton23/zxcvbn-go/frequency github.com/nbutton23/zxcvbn-go/scoring github.com/kisielk/gotool github.com/nbutton23/zxcvbn-go/matching github.com/ryanuber/go-glob github.com/nbutton23/zxcvbn-go github.com/GoASTScanner/gas/rules github.com/GoASTScanner/gas/cmd/gas Finished 6 of 6 golang.org/x/tools/cmd/gotype github.com/opennota/check/cmd/structcheck Finished 1 of 25 Finished 2 of 25 github.com/alexflint/go-scalar github.com/walle/lll github.com/alexflint/go-arg github.com/walle/lll/cmd/lll honnef.co/go/tools/deprecated golang.org/x/tools/go/types/typeutil honnef.co/go/tools/version honnef.co/go/tools/ssa Finished 3 of 25 honnef.co/go/tools/callgraph honnef.co/go/tools/ssa/ssautil golang.org/x/text/transform honnef.co/go/tools/lint honnef.co/go/tools/lint/lintutil honnef.co/go/tools/staticcheck/vrp golang.org/x/text/width honnef.co/go/tools/internal/sharedcheck honnef.co/go/tools/simple github.com/mdempsky/unconvert honnef.co/go/tools/callgraph/static honnef.co/go/tools/unused honnef.co/go/tools/functions honnef.co/go/tools/staticcheck honnef.co/go/tools/cmd/megacheck Finished 4 of 25 Finished 5 of 25 github.com/jgautheron/goconst github.com/jgautheron/goconst/cmd/goconst Finished 6 of 25 Finished 7 of 25 honnef.co/go/tools/cmd/gosimple golang.org/x/tools/go/ssa mvdan.cc/lint golang.org/x/tools/go/ssa/ssautil Finished 8 of 25 mvdan.cc/interfacer/check mvdan.cc/interfacer golang.org/x/tools/go/callgraph golang.org/x/tools/go/callgraph/cha golang.org/x/tools/go/callgraph/rta mvdan.cc/unparam/check mvdan.cc/unparam Finished 9 of 25 github.com/opennota/check/cmd/varcheck Finished 10 of 25 github.com/dnephin/govet/internal/whitelist github.com/dnephin/govet/internal/cfg github.com/dnephin/govet Finished 11 of 25 honnef.co/go/tools/cmd/unused Finished 12 of 25 Finished 13 of 25 github.com/alecthomas/gocyclo golang.org/x/tools/imports Finished 14 of 25 golang.org/x/tools/cmd/goimports github.com/mdempsky/maligned Finished 15 of 25 github.com/tsenart/deadcode Finished 16 of 25 github.com/mibk/dupl/suffixtree github.com/mibk/dupl/syntax github.com/mibk/dupl/syntax/golang github.com/mibk/dupl/printer Finished 17 of 25 github.com/mibk/dupl/job github.com/mibk/dupl github.com/client9/misspell Finished 18 of 25 github.com/alexkohler/nakedret github.com/client9/misspell/cmd/misspell Finished 19 of 25 golang.org/x/tools/container/intsets golang.org/x/tools/go/pointer github.com/stripe/safesql Finished 20 of 25 golang.org/x/tools/go/gcimporter15 golang.org/x/tools/go/gcexportdata golang.org/x/lint Finished 21 of 25 github.com/golang/lint/golint github.com/kisielk/errcheck/internal/errcheck github.com/kisielk/errcheck Finished 22 of 25 github.com/gordonklaus/ineffassign Finished 23 of 25 Finished 24 of 25 honnef.co/go/tools/cmd/staticcheck Finished 25 of 25 Building /home/parallels/Go/src/postgres_exporter/bin/postgres_exporter_v0.0.0_linux-amd64/postgres_exporter [parallels@centos7 postgres_exporter]$
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