settings.json:

{
    "go.inferGopath": false,
    "go.buildOnSave": "workspace",
    "go.lintOnSave": "package",
    "go.vetOnSave": "package",
    "go.buildTags": "",
    "go.buildFlags": [],
    "go.lintFlags": [],
    "go.vetFlags": [],
    "go.coverOnSave": false,
    "go.useCodeSnippetsOnFunctionSuggest": false,
    "go.formatOnSave": true,
    "go.formatTool": "goreturns",
    "go.goroot": "/home/???/???/go",
    "go.gocodeAutoBuild": false,
    "go.useLanguageServer": true,
    "go.alternateTools": {
      "go-langserver": "gopls", 
    },
    "go.languageServerExperimentalFeatures": {
      "format": true,
      "autoComplete": true
    },
    "[go]": {
        "editor.codeActionsOnSave": {
            "source.organizeImports": true
        },
    }
}

环境变量设置：

export GO111MODULE=on