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From: | Larry Ploetz |
Subject: | Couple Minor “Bugs” (?) |
Date: | Thu, 9 Jun 2022 15:52:55 -0700 |
User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 |
I'm trying to use ssh's proxy (-J flag) with GNU parallel. The -J
flag on ssh allows multiple hosts to be specified with commas
between them.
larryp-MBP:~ larry$ seq 48 | parallel -j0 --sshlogin '24/ssh -JINTHOST1,INHOST2 TARGETHOST' echo {} parallel: Warning: ssh to INTHOST2 TARGETHOST only allows for 0 simultaneous logins. parallel: Warning: You may raise this by changing parallel: Warning: /etc/ssh/sshd_config:MaxStartups and MaxSessions on INTHOST2 TARGETHOST. parallel: Warning: You can also try --sshdelay 0.1 parallel: Warning: Using only -1 connections to avoid race conditions. parallel: Warning: ssh to ssh -JINTHOST1 only allows for 0 simultaneous logins. parallel: Warning: You may raise this by changing parallel: Warning: /etc/ssh/sshd_config:MaxStartups and MaxSessions on ssh -JINTHOST1. parallel: Warning: You can also try --sshdelay 0.1 parallel: Warning: Using only -1 connections to avoid race conditions. parallel: Error: Cannot run any jobs.
If there's only one proxy host everything works as expected.
Also, in attempting to get around that limitation:
larryp-MBP:~ larry$ seq 48 | parallel -j0 --sshlogin '24/ssh -JINTHOST1\,INTHOST2 TARGETHOST' echo {} parallel: This should not happen. You have found a bug. Please follow https://www.gnu.org/software/parallel/man.html#reporting-bugs Include this in the report: * The version number: 20220530 * The bugid: SSHLogin parser failed on '88/ssh -JINTHOST1\' => '\' * The command line being run * The files being read (put the files on a webserver if they are big) If you get the error on smaller/fewer files, please include those instead.
See similar results with “-j1” flag to parallel, resulting in
command not found:
larryp-MBP:~ larry$ seq 4 | parallel -j1 --sshlogin '2/ssh -J INTHOST1,INTHOST2 TARGETHOST' echo {} /Users/larry/bin/bash: line 1: INTHOST2: command not found /Users/larry/bin/bash: line 1: INTHOST2: command not found /Users/larry/bin/bash: line 1: INTHOST2: command not found kex_exchange_identification: Connection closed by remote host Connection closed by UNKNOWN port 65535
Thanks,
· Larry
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