泊坞窗：E：无法找到软件包mysql-client --no-install-recommends

Question

我正在学习本教程： Docker中的Laravel 5.6，PHP 7.2，NGINX 1.10和MySQL 5.7

这基本上是对它的更新： Laravel + Docker第1部分-开发设置

但是当我跑步时

docker-compose up

我得到这个错误

E: Unable to locate package mysql-client —-no-install-recommends
ERROR: Service 'app' failed to build: The command '/bin/sh -c apt-get update && apt-get install -y mysql-client —-no-install-recommends  && docker-php-ext-install pdo_mysql' returned a non-zero code: 100

完整的输出

Creating network "pulzu_default" with the default driver
Building app
Step 1/2 : FROM php:7.2.2-fpm
 ---> 60245f64ed12
Step 2/2 : RUN apt-get update && apt-get install -y mysql-client —-no-install-recommends  && docker-php-ext-install pdo_mysql
 ---> Running in cefd70564b31
Get:1 http://security.debian.org stretch/updates InRelease [94.3 kB]
Ign:2 http://cdn-fastly.deb.debian.org/debian stretch InRelease
Get:3 http://cdn-fastly.deb.debian.org/debian stretch-updates InRelease [91.0 kB]
Get:5 http://security.debian.org stretch/updates/main amd64 Packages [468 kB]
Get:4 http://cdn-fastly.deb.debian.org/debian stretch Release [118 kB]
Get:6 http://cdn-fastly.deb.debian.org/debian stretch Release.gpg [2434 B]
Get:7 http://cdn-fastly.deb.debian.org/debian stretch-updates/main amd64 Packages [12.1 kB]
Get:8 http://cdn-fastly.deb.debian.org/debian stretch/main amd64 Packages [9530 kB]
Fetched 10.3 MB in 2s (4142 kB/s)
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package mysql-client —-no-install-recommends
ERROR: Service 'app' failed to build: The command '/bin/sh -c apt-get update && apt-get install -y mysql-client —-no-install-recommends  && docker-php-ext-install pdo_mysql' returned a non-zero code: 100

有谁知道如何解决？

Answer 1

该映像缺少能够安装mysql-client依赖项，这是由--no-install-recommends标志引起的。 默认情况下，Ubuntu安装推荐但不推荐的软件包。 使用--no-install-recommends ，仅--no-install-recommends主要依赖项（Depends字段中的软件包）。

更改Dockerfile或根据文章app.dockerfile为：

FROM php:7.2.2-fpm RUN apt-get update && apt-get install -y mysql-client \\ && docker-php-ext-install pdo_mysql

并且您应该能够构建映像，因此docker-compose up命令将起作用。