{"id":44839,"date":"2023-10-27T04:09:35","date_gmt":"2023-10-12T15:56:34","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/44839-2\/"},"modified":"2024-05-04T06:11:10","modified_gmt":"2024-05-03T22:11:10","slug":"44839-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/44839-2\/","title":{"rendered":""},"content":{"rendered":"

\u69cb\u6210<\/h1>\n

Go \u30a2\u30d7\u30ea<\/h2>\n
\u30a2\u30d7\u30ea\u540d\uff0f\u30b3\u30f3\u30c6\u30ca\u540d<\/dl>\n

 <\/p>\n

app\uff0fapp<\/dl>\n

\u6a5f\u80fd
\nID\u3092\u6307\u5b9a\u3057\u3066\u30c6\u30fc\u30d6\u30eb\u3092\u691c\u7d22\u30fb\u7d50\u679c\u8868\u793a
\n\u30d5\u30a9\u30eb\u30c0\u5171\u6709
\n\u30b3\u30f3\u30c6\u30ca\u4e2d\u306e go \u30d5\u30a1\u30a4\u30eb\u3092\u30db\u30b9\u30c8OS \u304b\u3089\u7de8\u96c6\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u306e\u3067\u3001
\n\u30db\u30b9\u30c8OS \u306e go \u30d5\u30a1\u30a4\u30eb\u304c\u3042\u308b\u30d5\u30a9\u30eb\u30c0\u3092 golang \u30b3\u30f3\u30c6\u30ca\u306b\u30de\u30a6\u30f3\u30c8<\/p>\n

PostgreSQL<\/h2>\n
\u30b3\u30f3\u30c6\u30ca\u540d<\/dl>\n

 <\/p>\n

postgres<\/dl>\n

 <\/p>\n

\u30e6\u30fc\u30b6\u540d\uff0f\u30d1\u30b9\u30ef\u30fc\u30c9<\/dl>\n

 <\/p>\n

app_user\uff0fpassword<\/dl>\n

 <\/p>\n

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u540d\uff0f\u30c6\u30fc\u30d6\u30eb\u540d<\/dl>\n

 <\/p>\n

app_db\uff0fTEST_USER<\/dl>\n

 <\/p>\n

\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf<\/dl>\n

 <\/p>\n

\u30b3\u30f3\u30c6\u30ca\u8d77\u52d5\u6642\u306b\u30c6\u30fc\u30d6\u30eb\u4f5c\u6210\u3068\u30c7\u30fc\u30bf\u633f\u5165\u3092\u884c\u3046<\/dl>\n

\u30d5\u30a1\u30a4\u30eb\u914d\u7f6e<\/h2>\n

$GOPATH\/src\/app \u4e2d\u306b\u3001docker \u3068 go \u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u6b21\u306e\u3088\u3046\u306a\u5f62\u3067\u914d\u7f6e<\/p>\n

\u2502\r\n\u251c\u2500docker-compose.yml\r\n\u251c\u2500docker\r\n\u2502  \u251c\u2500golang\r\n\u2502  \u2502   \u2514\u2500Dockerfile\r\n\u2502  \u2514\u2500postgres\r\n\u2502      \u251c\u2500Dockerfile\r\n\u2502      \u2514\u2500init\r\n\u2502          \u251c\u25001_create_table.sql\r\n\u2502          \u2514\u25002_insert_testdata.sql\r\n\u2514\u2500go\r\n    \u2514\u2500main.go\r\n<\/code><\/pre>\n
Docker \u8a2d\u5b9a<\/h1>\n
Docker Compose<\/h2>\n
\u300c\u4eca\u65e5\u304b\u3089\u59cb\u3081\u308bDocker\u3010docker-compose\u3092\u4f7f\u3063\u3066Go & Mysql\u3092\u3088\u3057\u306a\u306b\u8d77\u52d5\u3057\u3088\u3046\u7de8\u3011\u300d1 \u3092\u53c2\u8003\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n
# docker-compose \u306e\u30d0\u30fc\u30b8\u30e7\u30f3<\/span>\r\nversion<\/span>:<\/span> '<\/span>3'<\/span>\r\n\r\n# \u5404\u30b3\u30f3\u30c6\u30ca\u306e\u60c5\u5831<\/span>\r\nservices<\/span>:<\/span>\r\n\r\n  # postgres \u30b5\u30fc\u30d3\u30b9<\/span>\r\n  postgres<\/span>:<\/span>\r\n    # \u30b3\u30f3\u30c6\u30ca\u306e\u540d\u524d<\/span>\r\n    container_name<\/span>:<\/span> postgres<\/span>\r\n    # Dockerfile \u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30d1\u30b9<\/span>\r\n    build<\/span>:<\/span>\r\n      context<\/span>:<\/span> .<\/span>\r\n      dockerfile<\/span>:<\/span> .\/docker\/postgres\/Dockerfile<\/span>\r\n    # postgres \u8a2d\u5b9a<\/span>\r\n    environment<\/span>:<\/span>\r\n      -<\/span> POSTGRES_USER=app_user<\/span>\r\n      -<\/span> POSTGRES_PASSWORD=password<\/span>\r\n      -<\/span> POSTGRES_DB=app_db<\/span>\r\n\r\n  # golang \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/span>\r\n  app<\/span>:<\/span>\r\n    container_name<\/span>:<\/span> app<\/span>\r\n    # postgres \u3092\u30d3\u30eb\u30c9\u3057\u305f\u5f8c\u306b app \u3092\u30d3\u30eb\u30c9<\/span>\r\n    depends_on<\/span>:<\/span>\r\n      -<\/span> postgres<\/span>\r\n    # Dockerfile \u3092\u6307\u5b9a<\/span>\r\n    build<\/span>:<\/span>\r\n      context<\/span>:<\/span> .<\/span>\r\n      dockerfile<\/span>:<\/span> .\/docker\/golang\/Dockerfile<\/span>\r\n    # GOPATH\u3092\u6307\u5b9a<\/span>\r\n    environment<\/span>:<\/span>\r\n      -<\/span> GOPATH=\/go<\/span>\r\n    # \u30d5\u30a9\u30eb\u30c0\u5171\u6709\uff08\u30db\u30b9\u30c8OS:\u30b3\u30f3\u30c6\u30ca\uff09<\/span>\r\n    volumes<\/span>:<\/span>\r\n      -<\/span> .\/go:\/go\/src\/app\/go\/<\/span>\r\n    # docker-compose run \u5b9f\u884c\u6642\u306b\u5b9f\u884c\u3055\u308c\u308b\u30b3\u30de\u30f3\u30c9<\/span>\r\n    command<\/span>:<\/span> go run main.go<\/span>\r\n<\/code><\/pre>\n
Dockerfile<\/h2>\n
app<\/h3>\n
FROM golang:1.9\r\n\r\n# \u30b3\u30f3\u30c6\u30ca\u4f5c\u696d\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5909\u66f4\r\nWORKDIR \/go\/src\/denki\/go\r\n# \u30db\u30b9\u30c8OS\u306e .\/go \u306e\u4e2d\u8eab\u3092\u4f5c\u696d\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u8ffd\u52a0\r\nADD .\/go .\r\n\r\n# \u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\r\nRUN go get github.com\/lib\/pq\r\n<\/code><\/pre>\n
postgres<\/h3>\n
FROM postgres:latest\r\nRUN localedef -i ja_JP -c -f UTF-8 -A \/usr\/share\/locale\/locale.alias ja_JP.UTF-8\r\nENV LANG ja_JP.UTF-\r\n\r\n# \u521d\u671f\u5316\u7528 sql \u30d5\u30a1\u30a4\u30eb\u3092\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u306e\u6240\u5b9a\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30b3\u30d4\u30fc\r\nCOPY .\/docker\/postgres\/init\/*.sql \/docker-entrypoint-initdb.d\/\r\n<\/code><\/pre>\n
\/docker-entrypoint-initdb.d\/ \u5185\u306b sql \u30d5\u30a1\u30a4\u30eb\u3092\u914d\u7f6e\u3059\u308b\u3068\u3001\u305d\u308c\u3089\u3092\u81ea\u52d5\u3067\u5b9f\u884c\u3057\u3066\u304f\u308c\u308b\u3089\u3057\u30442<\/p>\n
\u305d\u306e\u4ed6\u30d5\u30a1\u30a4\u30eb<\/h1>\n
SQL\u30d5\u30a1\u30a4\u30eb<\/h2>\n
\u30c6\u30fc\u30d6\u30eb\u4f5c\u6210<\/p>\n
CREATE TABLE TEST_USER (\r\n    user_id BIGINT PRIMARY KEY,\r\n    user_password VARCHAR(20) NOT NULL\r\n);\r\n<\/code><\/pre>\n
\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u633f\u5165<\/p>\n
DELETE FROM TEST_USER;\r\nINSERT INTO TEST_USER VALUES(1, 'password1');\r\nINSERT INTO TEST_USER VALUES(2, 'password2');\r\n<\/code><\/pre>\n
Go<\/h2>\n
\u66f8\u7c4d\u300cGo\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b9f\u8df5\u5165\u9580\u300d3\u3092\u53c2\u8003\u306b\u3057\u307e\u3057\u305f<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"database\/sql\"<\/span>\r\n    \"fmt\"<\/span>\r\n    \"log\"<\/span>\r\n\r\n    \/\/ postgres \u30c9\u30e9\u30a4\u30d0<\/span>\r\n    _<\/span> \"github.com\/lib\/pq\"<\/span>\r\n)<\/span>\r\n\r\n\/\/ TestUser : \u30c6\u30fc\u30d6\u30eb\u30c7\u30fc\u30bf<\/span>\r\ntype<\/span> TestUser<\/span> struct<\/span> {<\/span>\r\n    UserID<\/span>   int<\/span>\r\n    Password<\/span> string<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u30e1\u30a4\u30f3\u95a2\u6570<\/span>\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n\r\n    \/\/ Db: \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u30cf\u30f3\u30c9\u30e9<\/span>\r\n    var<\/span> Db<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span>\r\n    \/\/ Db\u306e\u521d\u671f\u5316<\/span>\r\n    Db<\/span>,<\/span> err<\/span> :=<\/span> sql<\/span>.<\/span>Open<\/span>(<\/span>\"postgres\"<\/span>,<\/span> \"host=postgres user=app_user password=password dbname=app_db sslmode=disable\"<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        log<\/span>.<\/span>Fatal<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ SQL\u6587\u306e\u69cb\u7bc9<\/span>\r\n    sql<\/span> :=<\/span> \"SELECT user_id, user_password FROM TEST_USER WHERE user_id=$1;\"<\/span>\r\n\r\n    \/\/ preparedstatement \u306e\u751f\u6210<\/span>\r\n    pstatement<\/span>,<\/span> err<\/span> :=<\/span> Db<\/span>.<\/span>Prepare<\/span>(<\/span>sql<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        log<\/span>.<\/span>Fatal<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ \u691c\u7d22\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u30e6\u30fc\u30b6ID\uff09<\/span>\r\n    queryID<\/span> :=<\/span> 1<\/span>\r\n    \/\/ \u691c\u7d22\u7d50\u679c\u683c\u7d0d\u7528\u306e TestUser<\/span>\r\n    var<\/span> testUser<\/span> TestUser<\/span>\r\n\r\n    \/\/ queryID \u3092\u57cb\u3081\u8fbc\u307f SQL \u306e\u5b9f\u884c\u3001\u691c\u7d22\u7d50\u679c1\u4ef6\u306e\u53d6\u5f97<\/span>\r\n    err<\/span> =<\/span> pstatement<\/span>.<\/span>QueryRow<\/span>(<\/span>queryID<\/span>)<\/span>.<\/span>Scan<\/span>(<\/span>&<\/span>testUser<\/span>.<\/span>UserID<\/span>,<\/span> &<\/span>testUser<\/span>.<\/span>Password<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        log<\/span>.<\/span>Fatal<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ \u691c\u7d22\u7d50\u679c\u306e\u8868\u793a<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>testUser<\/span>.<\/span>UserID<\/span>,<\/span> testUser<\/span>.<\/span>Password<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
Docker Compose \u306e\u5b9f\u884c<\/h1>\n
\u30b7\u30a7\u30eb\u3067\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c<\/p>\n
$ docker-compose build  # \u30a4\u30e1\u30fc\u30b8\u306e\u4f5c\u6210\r\n$ docker-compose up     # \u30b3\u30f3\u30c6\u30ca\u306e\u4f5c\u6210\u3001\u8d77\u52d5\r\n<\/code><\/pre>\n
\u30b3\u30f3\u30c6\u30ca\u306e\u8d77\u52d5\u9806\u5e8f\u3092\u6307\u5b9a\u3057\u3066\u3044\u306a\u3044\u305f\u3081\u3001postgres \u3088\u308a\u524d\u306b app \u30b3\u30f3\u30c6\u30ca\u304c\u5148\u306b\u8d77\u52d5\u3059\u308b\u5834\u5408\u304c\u3042\u308b\u3002
\n\u305d\u3046\u306a\u308b\u3068 DB \u306b\u30c6\u30fc\u30d6\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u30a8\u30e9\u30fc\u304c\u5410\u304b\u308c\u308b<\/p>\n
app     | 2018\/12\/15 13:50:02 dial tcp 172.29.0.2:5432: getsockopt: connection refused\r\n<\/code><\/pre>\n
\u4e00\u56de Ctrl+C \u3067\u30b3\u30f3\u30c6\u30ca\u3092\u505c\u6b62\u3055\u305b\u3001\u3082\u3046\u4e00\u5ea6 docker-compose up \u3067\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001app \u306e\u5b9f\u884c\u7d50\u679c\uff08 app | 1 password1 \uff09\u304c\u8868\u793a\u3055\u308c\u308b<\/p>\n
\u203b\u8d77\u52d5\u9806\u5e8f\u3092\u6307\u5b9a\u3057\u305f\u3044\u3068\u304d\u306f\u3001docker-compose \u306e entrypoint \u3068\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u3088\u3063\u3066\u3001DB\u30b3\u30f3\u30c6\u30ca\u304c\u8d77\u52d5\u3059\u308b\u307e\u3067\u30a2\u30d7\u30ea\u8d77\u52d5\u3092\u5f85\u6a5f\u3055\u305b\u308b\u65b9\u6cd5\u304c\u3042\u308b 4<\/p>\n
\u30b3\u30f3\u30c6\u30ca\u306e\u505c\u6b62\u30fb\u7834\u68c4<\/p>\n
docker-compose down\r\n<\/code><\/pre>\n
\u30a4\u30e1\u30fc\u30b8\u306e\u7834\u68c4<\/p>\n
docker image rm app_app app_postgres\r\n<\/code><\/pre>\n
\u8a70\u307e\u3063\u305f\u3068\u3053\u308d<\/h1>\n
go get \u306b\u5931\u6557\u3059\u308b<\/h2>\n
\u30a4\u30e1\u30fc\u30b8\u306e\u30d3\u30eb\u30c9\u306e\u969b\u3001go get \u306b\u304a\u3044\u3066<\/p>\n
cannot find package \"\u30d1\u30c3\u30b1\u30fc\u30b8\u540d\" ... (from $GOROOT) ... (from $GOPATH)\r\n<\/code><\/pre>\n
\u306e\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u30d3\u30eb\u30c9\u306b\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u539f\u56e0\u3068\u3057\u3066\u3001<\/p>\n
    \n
  • \n
      \u30d1\u30c3\u30b1\u30fc\u30b8\u81ea\u4f53\u304c\u5b58\u5728\u3057\u306a\u3044\u304b\u3001\u30d1\u30b9\u304c\u9593\u9055\u3063\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        golang \u30a4\u30e1\u30fc\u30b8\u306b git \u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u306a\u30445<\/ul>\n
        \u304c\u3042\u308b\u3089\u3057\u3044\u306e\u3067\u3001URI\u3092\u78ba\u8a8d\u3059\u308b\u306a\u308a\u3001\u30a4\u30e1\u30fc\u30b8\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092 golang:1.9 \u306b\u5909\u66f4\u3059\u308b\u7b49\u3059\u308b<\/p>\n
        postgres \u30b3\u30f3\u30c6\u30ca\u306b\u63a5\u7d9a\u3067\u304d\u306a\u3044<\/h2>\n
        main.go \u306e DB \u63a5\u7d9a\u8a2d\u5b9a\u3067<\/p>\n
        var Db *sql.DB\r\n\/\/ Db\u306e\u521d\u671f\u5316\r\nDb, err := sql.Open(\"postgres\", \"host=localhost user=...\r\n<\/code><\/pre>\n
        \u306e\u3088\u3046\u306b host=localhost \u3068\u3059\u308b\u3068<\/p>\n
        app  | ... dial tcp 127.0.0.1:5432: connect: connection refused\r\n<\/code><\/pre>\n
        \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30a8\u30e9\u30fc\u304c\u5410\u304b\u308c\u308b\u3002host \u306e\u5024\u306f\u3001\u63a5\u7d9a\u5148\u306e\u30b3\u30f3\u30c6\u30ca\u540d\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b6 \u306e\u3067\u3001host=postgres \u306b\u4fee\u6b63\u3057\u3066\u89e3\u6c7a<\/p>\n
        \n
        https:\/\/qiita.com\/yu-croco\/items\/0c0d5083298f7db9e1bb\u00a0\u21a9<\/p>\n
        https:\/\/qiita.com\/hirosemi\/items\/199a3c753130c12d52f1\u00a0\u21a9<\/p>\n
        https:\/\/book.impress.co.jp\/books\/1115101145\u00a0\u21a9<\/p>\n
        http:\/\/docs.docker.jp\/compose\/startup-order.html\u00a0\u21a9<\/p>\n
        https:\/\/stackoverflow.com\/questions\/44210502\/docker-compose-cannot-find-package-golang\u00a0\u21a9<\/p>\n
        https:\/\/qiita.com\/unvavo\/items\/7b3d1ef9403f6b4b8456\u00a0\u21a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
        \u69cb\u6210 Go \u30a2\u30d7\u30ea \u30a2\u30d7\u30ea\u540d\uff0f\u30b3\u30f3\u30c6\u30ca\u540d   app\uff0fapp \u6a5f\u80fd ID\u3092\u6307\u5b9a\u3057\u3066\u30c6\u30fc\u30d6\u30eb\u3092\u691c\u7d22\u30fb\u7d50 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44839","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/44839-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u69cb\u6210 Go \u30a2\u30d7\u30ea \u30a2\u30d7\u30ea\u540d\uff0f\u30b3\u30f3\u30c6\u30ca\u540d   app\uff0fapp \u6a5f\u80fd ID\u3092\u6307\u5b9a\u3057\u3066\u30c6\u30fc\u30d6\u30eb\u3092\u691c\u7d22\u30fb\u7d50 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/44839-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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