はじめに

最近、Hugoでブログを作って、GCPのGAE(Google App Engine)で公開した。
公開したブログ

選定理由などはブログに書いているが、GAEに公開する所でちょっと苦戦した部分を記載する。

参考にしたサイト

Hugoでブログつくるまで
https://qiita.com/bake0937/items/e0914efbd9434be474a4

GAEでの公開
https://blog.youyo.info/post/2015/10/23/publish-hugo-in-gae/

GAEへの公開でエラー

deployでエラー１

$ gcloud app deploy
 ERROR: (gcloud.app.deploy) The [application] field is specified in file [/home/hoge/dir/app.yaml]. This field is not used by gcloud and must be removed. Project name should instead be specified either by `gcloud config set project MY_PROJECT` or by setting the `--project` flag on individual command executions.

yamlの様式が変わった模様
http://hamarimakuri.blogspot.com/2018/03/gae.html
ドキュメントみて修正

deployでエラー2

$ gcloud app deploy
 The component [app-engine-go] is required for staging this 
 application.
 ERROR: (gcloud.app.deploy) You cannot perform this action because this Cloud SDK installation is managed by an external package manager.
 Please consider using a separate installation of the Cloud SDK created through the default mechanism described at: https://cloud.google.com/sdk/

gcloudコマンドをaptで入れたため、古かったのが原因っぽい
https://qrunch.net/@regonn/entries/sIescQ9qdgJZ0qWa
インストーラ使って再インストールした

deployでエラー3

$ gcloud app deploy
 ERROR: (gcloud.app.deploy) Staging command [/home/hoge/google-cloud-sdk/platform/google_appengine/go-app-stager /home/hoge/dir/app.yaml /home/hoge/dir /tmp/tmprq6eNx/tmpSQWQij] failed with return code [1].

 ------------------------------------ STDOUT ------------------------------------
 ------------------------------------ STDERR ------------------------------------
 2020/01/26 18:44:00 staging for go1.11
 2020/01/26 18:44:00 GO111MODULE=auto, but no go.mod found, so building with dependencies from GOPATH
 2020/01/26 18:44:00 Staging second-gen Standard app (GOPATH mode): failed analyzing /home/hoge/dir: could not get package for dir "/home/hoge/dir": no buildable Go source files in /home/hoge/dir
 GOPATH: /home/hoge/dir/.go
 --------------------------------------------------------------------------------

goのコードが存在しない事が原因のよう
ドキュメントとGitHubのサンプルを見つつ、main.goを作成

デプロイできた！

出来上がった設定ファイル

app.yaml

runtime: go111

handlers:
- url: /(.*\.css)
  mime_type: text/css
  static_files: public/\1
  upload: public/(.*\.css)

- url: /(.*\.html)
  mime_type: text/html
  static_files: public/\1
  upload: public/(.*\.html)
  secure: always

- url: /(.*\.ico)
  mime_type: image/x-icon
  static_files: public/\1
  upload: public/(.*\.ico)

- url: /(.*\.js)
  mime_type: text/javascript
  static_files: public/\1
  upload: public/(.*\.js)

- url: /(.*\.ttf)
  mime_type: font/truetype
  static_files: public/\1
  upload: public/(.*\.ttf)

- url: /(.*\.woff)
  mime_type: application/x-font-woff
  static_files: public/\1
  upload: public/(.*\.woff)

- url: /(.*\.xml)
  mime_type: application/xml
  static_files: public/\1
  upload: public/(.*\.xml)

- url: /(.*\.(bmp|gif|ico|jpeg|jpg|png))
  static_files: public/\1
  upload: public/(.*\.(bmp|gif|ico|jpeg|jpg|png))

- url: /(.+)/
  static_files: public/\1/index.html
  upload: public/(.+)/index.html
  secure: always

- url: /(.+)
  static_files: public/\1/index.html
  upload: public/(.+)/index.html
  secure: always

- url: /
  static_files: public/index.html
  upload: public/index.html
  secure: always

※元の設定ファイルだとhttpでアクセスできてしまうので「secure: always」を追加しました。
Google App Engineにデプロイしたアプリへの接続を常時https化する

main.go

package main

import (
//  "fmt"
    "log"
    "net/http"
    "os"
)

func main() {
//  http.HandleFunc("/", indexHandler)

    // [START setting_port]
    port := os.Getenv("PORT")
    if port == "" {
        port = "8080"
        log.Printf("Defaulting to port %s", port)
    }

    log.Printf("Listening on port %s", port)
    if err := http.ListenAndServe(":"+port, nil); err != nil {
        log.Fatal(err)
    }
    // [END setting_port]
}

最後に

ちょっと苦戦はしたけど、Hugoは楽ちんです！

HugoをGAEで公開時に苦戦した話