如何在powershell上通过kubectl exec发送一个简单的管道？单个命令和参数工作正常。
在rancher内部的linux和kubectl shell中运行良好：

$> kubectl exec test12-7b7fd6b4f4-wzp59 --namespace=test12 -- dmesg | tail -1
[562119.054019] oom_reaper: reaped process 2410 (supervisorctl), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

kubectl exec需要取消引用-- dmesg | tail -1，但是powershell捕获了它：

PS> kubectl exec test12-7b7fd6b4f4-wzp59 --namespace=test12 -- dmesg | tail -1
tail : The term 'tail' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:168
+ ... namespace=test12 -- dmesg | tail -1
+                                                                  ~~~~
    + CategoryInfo          : ObjectNotFound: (tail:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

如果我引用库贝特尔的话，他抱怨说：

PS> kubectl exec test12-7b7fd6b4f4-wzp59 --namespace=test12 -- "dmesg | tail -1"
OCI runtime exec failed: exec failed: unable to start container process: exec: "dmesg | tail -1": executable file not found in $PATH: unknown
command terminated with exit code 126

命令和参数的作用：

PS> kubectl exec test12-7b7fd6b4f4-wzp59 --namespace=test12 -- ls -l /var/log/lastlog 
-rw-rw-r-- 1 root utmp 2920292 Jan 27 09:56 /var/log/lastlog

我发现了这个链接，并尝试了所有这些，甚至停止解析--%，但没有工作：https://www.octopus.com/blog/powershell-pipe-escaping
一个简单的解决方法是在构建容器时在容器中创建别名：alias ll='dmesg|tail -1'
并将其附加到~./bashrc