在 Docker-Compose 中向服务添加主机名
Docker 中的每个服务容器都加入默认网络。 该网络上的其他容器可以访问它，并且它们可以使用与容器名称相同的主机名来发现它。
本文将讨论在 docker-compose 中将主机名添加到我们的容器服务。
在 Docker-Compose 中向服务添加主机名
作为 docker-compose 3.0 版，我们可以使用主机名键并将其添加到我们的 YAML 文件中。 确保我们已经明确定义了 docker-compose 在运行我们的服务时使用的版本。
要确定版本，请使用值为 3 或 3.0 的版本密钥。
version: "3.0"
services:
sampleservice:
hostname: service-hostname
如果没有版本密钥，docker-compose 将在运行服务时使用版本 1 的默认值。 对于版本 1，我们不会正确设置主机名。
但是，存在一个已知问题，如果我们执行 docker run 命令，主机名将对其他容器不可见。 我们可以定义一个别名，并为容器分配一个名称作为解决方法。
要定义别名，请先通过运行以下命令启用已定义的别名。
$ docker-compose run --use-aliases
运行后，我们可以使用别名密钥并将其包含在我们的 YAML 文件中。
version: "3.0"
services:
sampleservice:
networks:
samplenetwork:
aliases:
- alias1
- alias2
之后，使用以下命令手动将别名分配给服务。
$ docker-compose run --name alias1 sampleservice
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