在 Alpine Docker 容器上安装 OpenSSH

当第一次运行高山码头容器并尝试 openssh 安装时，会发生以下情况:

ole@T:~$ docker run -it --rm alpine /bin/ash
/ # apk add openssh
WARNING: Ignoring APKINDEX.d3812b7e.tar.gz: No such file or directory
WARNING: Ignoring APKINDEX.bb2c5760.tar.gz: No such file or directory
ERROR: unsatisfiable constraints:
openssh (missing):
required by: world[openssh]

如何安装 openssh？

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最佳答案

Run apk update first. The below paste contains a complete example:

    ole@T:~$ docker run -it --rm alpine /bin/ash
/ # apk update
fetch http://dl-4.alpinelinux.org/alpine/v3.3/main/x86_64/APKINDEX.tar.gz
fetch http://dl-4.alpinelinux.org/alpine/v3.3/community/x86_64/APKINDEX.tar.gz
v3.3.1-97-g109077d [http://dl-4.alpinelinux.org/alpine/v3.3/main]
v3.3.1-59-g48b0368 [http://dl-4.alpinelinux.org/alpine/v3.3/community]
OK: 5853 distinct packages available
/ # apk add openssh
(1/3) Installing openssh-client (7.1_p2-r0)
(2/3) Installing openssh-sftp-server (7.1_p2-r0)
(3/3) Installing openssh (7.1_p2-r0)
Executing busybox-1.24.1-r7.trigger
OK: 8 MiB in 14 packages
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As the answer is already given but I will add up something.

In the new version, If you want to install something without caching things locally, which is recommended for keeping your containers small, include the --no-cache flag. Example:

apk add --no-cache openssh

This is a small gain, it keeps you from having the common rm -rf /var/cache/apk/* at the end of your Dockerfile.

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Dockerfile for your reference

FROM alpine:3


RUN apk add --update --no-cache openssh


CMD ["ssh"]

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