Python fabric 1.4 解決run() received nonzero return code 2 while executing出錯後腳本不能繼續執行故障

默認情況下fabric配置參數warn_only=False，即run指令得到的程序結束返回值不爲0則引發異常，退出後續的部署。

參考一下代碼，有兩種方式設置warn_only=True，可實現出錯後能繼續向下執行

def deploy():
    with settings(
            warn_only=True
    ):
        run("ls /zz| grep ccc| grep -v fdsfds")
    print "111"
    run("ls /zz", warn_only=True)
    print "222"

輸出參考

D:\code\devops\trunk>fab -f test.py deploy
[] Executing task 'deploy'
[127.0.0.1:22] run: ls /zz| grep ccc| grep -v fdsfds
[127.0.0.1:22] out: ls: cannot access /zz: No such file or directory
[127.0.0.1:22] out:


Warning: run() received nonzero return code 1 while executing 'ls /zz| grep ccc| grep -v fdsfds'!

111
[127.0.0.1:22] run: ls /zz
[127.0.0.1:22] out: ls: cannot access /zz: No such file or directory
[127.0.0.1:22] out:


Warning: run() received nonzero return code 2 while executing 'ls /zz'!

222

Done.
Disconnecting from 127.0.0.1:22... done.