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docker - 如何将主机映射添加到 minikube 的 /etc/host？

问题描述

我的minikube环境如下： -

我想在容器/etc/hosts内部添加一些额外的主机映射（5+ IP 和名称）。minikube然后我使用minikube ssh进入 shell 并尝试echo "172.17.x.x my.some.host" >> /etc/hosts. -bash: /etc/hosts: Permission denied由于登录到此 shell 的用户是 a docker，而不是 a ，因此出现错误root。

我还发现在主机上有一个名为minikuberunning 的 docker 容器，使用docker container ls. 即使我可以root使用docker exec -it -u root minikube /bin/bash. 我知道这是一种调整，可能是一种不好的做法。尤其是任务太多。

关于dockerand docker-composewhich 提供--add-host和extra_hosts分别添加主机名映射，是否minikube提供？minikube在和/或系统管理员的观点良好实践中是否有任何良好实践可以实现这一目标？

编辑 1

echo 172.17.x.x my.some.host > ~/.minikube/files/etc/hosts启动后minikube，出现如下错误：-

[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get "http://localhost:10248/healthz": dial tcp: lookup localhost on 8.8.8.8:53: no such host.

        Unfortunately, an error has occurred:
                timed out waiting for the condition

        This error is likely caused by:
                - The kubelet is not running
                - The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)

        If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
                - 'systemctl status kubelet'
                - 'journalctl -xeu kubelet'

        Additionally, a control plane component may have crashed or exited when started by the container runtime.
        To troubleshoot, list all containers using your preferred container runtimes CLI.

        Here is one example how you may list all Kubernetes containers running in docker:
                - 'docker ps -a | grep kube | grep -v pause'
                Once you have found the failing container, you can inspect its logs with:
                - 'docker logs CONTAINERID'

然后我使用vi创建一个完整的hosts文件~/.minikube/files/etc/hosts如下： -

127.0.0.1       localhost
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

172.17.x.x my.some.host1
172.17.x.y my.some.host2
...

此时minikube启动正常。

标签： dockerkubernetesminikube

解决方案

Minikube 有一个内置的同步机制，可以通过以下示例部署所需的 /etc/hosts：

mkidr -p ~/.minikube/files/etc
echo 127.0.0.1 localhost > ~/.minikube/files/etc/hosts
minikube start

然后去检查它是否工作：

minikube ssh

一旦你进入容器：

cat /etc/hosts

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