安装ssh-batch工具
关于sshbatch
sshbatch是用perl写了非常方便操作管理集群的一个工具，项目的源码在GitHub托管。
关于sshbatch以及其详细的使用方法，春哥在GitHub上介绍的非常详细了，详情可以前往sshbatch主页查询。
安装
源码安装
可以在从GitHub下载源码，并使用源码安装，安装步骤如下
perl Makefile.PL
make
make test
sudo make install
cpan安装
sshbatch是perl语言写，在Perl程序库CPAN里也存在，我们也可以使用cpan命令来快速安装
首先你要确定下你机器上是否有安装了cpan，可以在命令行中直接输入cpan来查看是安装
1 $ cpan 2 -bash: cpan: command not found
若果出现上面提示，说明机器上还没有安装cpan命令
你可以使用 sudo yum install cpan 进行安装cpan（centos机器安装命令，其他机器使用相应命令下载）
1 ➜ ~ cpan 2 Terminal does not support AddHistory. 3 4 cpan shell -- CPAN exploration and modules installation (v2.00) 5 Enter 'h' for help. 6 7 cpan[1]>
如果出现以上提示，证明机器上安装了cpan
这时我们就可以使用 sudo cpan SSH::Batch 进行安装sshbatch了
若果sshbatch所以来的包都存在，此时都会出现以下提示
1 Running make install 2 Installing /usr/local/share/perl5/SSH/Batch.pm 3 Installing /usr/local/share/perl5/SSH/Batch/ForNodes.pm 4 Installing /usr/local/share/man/man1/fornodes.1 5 Installing /usr/local/share/man/man1/key2nodes.1 6 Installing /usr/local/share/man/man1/tonodes.1 7 Installing /usr/local/share/man/man1/atnodes.1 8 Installing /usr/local/share/man/man3/SSH::Batch::ForNodes.3pm 9 Installing /usr/local/share/man/man3/SSH::Batch.3pm 10 Installing /usr/local/bin/fornodes 11 Installing /usr/local/bin/key2nodes 12 Installing /usr/local/bin/tonodes 13 Installing /usr/local/bin/atnodes 14 Appending installation info to /usr/lib64/perl5/perllocal.pod 15 AGENT/SSH-Batch-0.030.tar.gz 16 /bin/make install -- OK
说明我们已经安装成功了，可以拿我们最常用的atnodes命令来测试下是否正确安装(可能由于某种原因你还需要使用绝对路径/usr/local/bin/atnodes来使用atnodes)
1 atnodes -h 2 USAGE: 3 4 atnodes [OPTIONS] COMMAND... -- HOST_PATTERN... [OPTIONS] 5 atnodes [OPTIONS] COMMAND HOST_PATTERN... [OPTIONS] 6 7 OPTIONS: 8 -c <num> Set SSH concurrency limit. (default: 20, 9 when -tty is on, this setting will no use) 10 -h Print this help. 11 -l List the hosts and do nothing else. 12 -L Use the line-mode output format, i.e., prefixing 13 every output line with the machine name. 14 (could be controlled by the env SSH_BATCH_LINE_MODE) 15 -p <port> Port for the remote SSH service. 16 -ssh <path> Specify an alternate ssh program. 17 (This overrides the SSH_BATCH_SSH_CMD environment.) 18 -t <timeout> Specify timeout for net traffic. 19 -u <user> User account for SSH login. 20 -v Be verbose. 21 -w Prompt for password (used for both login and sudo, 22 could be privided by SSH_BATCH_PASSWORD). 23 -W Prompt for password (just for sudo), 24 should not be used with -w. 25 -P Prompt for passphrase (used for login, 26 could be privided by SSH_BATCH_PASSPHRASE). 27 -tty Pseudo-tty. 28 -q Run SSH in quiet mode
可见现在我们已经可以正常使用atnodes了
问题列表
可是现实往往不是这样的，无论你是用源码安装还是用cpan安装，你都有可能遇到各种各样的问题，不然你也不会看到这篇文章，下面是我安装时遇到的一些问题，记录下来，方便自己以后安装此工具
问题1
命令
sudo cpan SSH::Batch
问题
1 Test Summary Report 2 ------------------- 3 t/atnodes.t (Wstat: 2560 Tests: 24 Failed: 10) 4 Failed tests: 2, 5, 8, 11, 13-14, 17, 19-20, 23 5 Non-zero exit status: 10 6 t/fornodes.t (Wstat: 28160 Tests: 126 Failed: 110) 7 Failed tests: 2, 5, 7-11, 13-24, 26, 28-32, 34-41, 43-68 8 70-93, 95, 98, 101, 103-126 9 Non-zero exit status: 110 10 t/tonodes.t (Wstat: 5888 Tests: 45 Failed: 23) 11 Failed tests: 2, 5, 8, 11, 14, 16-17, 19-20, 23, 25-27 12 29, 31-32, 35, 37-38, 40-41, 43-44 13 Non-zero exit status: 23 14 Files=6, Tests=195, 1 wallclock secs ( 0.06 usr 0.01 sys + 0.94 cusr 0.29 csys = 1.30 CPU) 15 Result: FAIL 16 Failed 3/6 test programs. 143/195 subtests failed. 17 make: *** [test_dynamic] Error 23 18 AGENT/SSH-Batch-0.030.tar.gz 19 2 dependencies missing (File::HomeDir,Net::OpenSSH); additionally test harness failed 20 /bin/make test -- NOT OK 21 //hint// to see the cpan-testers results for installing this module, try: 22 reports AGENT/SSH-Batch-0.030.tar.gz 23 Running make install 24 make test had returned bad status, won't install without force
从第19行可以看出，sshbatch依赖的两个包不存在，安装失败，那我们只能缺什么安装什么了，
解决方法
1 sudo cpan File::HomeDir 2 sudo cpan Net::OpenSSH
问题2
安装File::HomeDir时，提示依赖包File::Which不存在，使用cpan安装File::Which
命令
sudo cpan File::Which
问题
1 t/00_diag.t ..... ok 2 t/01_compile.t .. ok 3 t/02_all.t ...... Can't locate Env.pm in @INC (@INC contains: /root/.cpan/build/File-Which-1.22-7sw4CO/blib/lib /root/.cpan/build/File-Which-1.22-7sw4CO/blib/arch /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at t/02_all.t line 3. 4 BEGIN failed--compilation aborted at t/02_all.t line 3. 5 t/02_all.t ...... Dubious, test returned 2 (wstat 512, 0x200) 6 No subtests run 7 t/03_simple.t ... Can't locate Env.pm in @INC (@INC contains: /root/.cpan/build/File-Which-1.22-7sw4CO/blib/lib /root/.cpan/build/File-Which-1.22-7sw4CO/blib/arch /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at t/03_simple.t line 6. 8 BEGIN failed--compilation aborted at t/03_simple.t line 6. 9 # Looks like your test exited with 2 before it could output anything. 10 t/03_simple.t ... Dubious, test returned 2 (wstat 512, 0x200) 11 Failed 10/10 subtests 12 t/04_pwhich.t ... ok 13 14 Test Summary Report 15 ------------------- 16 t/02_all.t (Wstat: 512 Tests: 0 Failed: 0) 17 Non-zero exit status: 2 18 Parse errors: No plan found in TAP output 19 t/03_simple.t (Wstat: 512 Tests: 0 Failed: 0) 20 Non-zero exit status: 2 21 Parse errors: Bad plan. You planned 10 tests but ran 0. 22 Files=5, Tests=5, 1 wallclock secs ( 0.02 usr 0.01 sys + 0.28 cusr 0.03 csys = 0.34 CPU) 23 Result: FAIL 24 Failed 2/5 test programs. 0/5 subtests failed. 25 make: *** [test_dynamic] Error 255 26 PLICEASE/File-Which-1.22.tar.gz 27 /bin/make test -- NOT OK 28 //hint// to see the cpan-testers results for installing this module, try: 29 reports PLICEASE/File-Which-1.22.tar.gz 30 Running make install 31 make test had returned bad status, won't install without force
解决方法
从Test Summary Report中可以看到（16~21行），这次是由于安装前的test没有全部成功导致的，其中t/02_all.t和t/03_simple.t两个test失败。
从第3行和第7行可以看出我们机器上还是少了点什么？虽然少什么我看不明白，但我会google啊，原来获取Env.pm需要使用perl-Env包
解决办法
sudo yum install perl-Env -y
问题总结
以前没有用过perl也没有使用cpan安装过perl程序，在遇到这个问题时，自己根本没有认真看错误的原因，扫了眼看到了
Parse errors: No plan found in TAP output
以为是这就是根本原因，就使用这个关键字在使用google，自然白忙活一阵，也没有找到解决办法。所以以后要认真看下错误提示，找到根本原因。
问题3
安装完perl-Env后，我们就可以很顺利的把File::HomeDir以及他的依赖程序安装完成，在安装Net::OpenSSH时，又出现一下问题
问题
1 t/1_run.t .... Can't locate Digest/MD5.pm in @INC (@INC contains: ./t /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/lib /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/arch /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/lib/Net/OpenSSH.pm line 23. 2 BEGIN failed--compilation aborted at /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/lib/Net/OpenSSH.pm line 23. 3 Compilation failed in require at t/1_run.t line 10. 4 BEGIN failed--compilation aborted at t/1_run.t line 10. 5 t/1_run.t .... Dubious, test returned 2 (wstat 512, 0x200) 6 No subtests run 7 t/quoting.t .. # unable to exec csh -c echo good 8 # unable to exec tcsh -c echo good 9 # unable to exec ksh -c echo good 10 # unable to exec dash -c echo good 11 # unable to exec ash -c echo good 12 # unable to exec pdksh -c echo good 13 # unable to exec mksh -c echo good 14 # unable to exec zsh -c echo good 15 # unable to exec fish -c echo good 16 # running tests for shells sh bash 17 t/quoting.t .. ok 18 t/uri.t ...... Can't locate Digest/MD5.pm in @INC (@INC contains: /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/lib /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/arch /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/lib/Net/OpenSSH.pm line 23. 19 BEGIN failed--compilation aborted at /root/.cpan/build/Net-OpenSSH-0.77-rRapXd/blib/lib/Net/OpenSSH.pm line 23. 20 Compilation failed in require at t/uri.t line 7. 21 BEGIN failed--compilation aborted at t/uri.t line 7. 22 t/uri.t ...... Dubious, test returned 2 (wstat 512, 0x200) 23 No subtests run 24 25 Test Summary Report 26 ------------------- 27 t/1_run.t (Wstat: 512 Tests: 0 Failed: 0) 28 Non-zero exit status: 2 29 Parse errors: No plan found in TAP output 30 t/uri.t (Wstat: 512 Tests: 0 Failed: 0) 31 Non-zero exit status: 2 32 Parse errors: No plan found in TAP output 33 Files=3, Tests=406, 2 wallclock secs ( 0.07 usr 0.01 sys + 0.58 cusr 0.67 csys = 1.33 CPU) 34 Result: FAIL 35 Failed 2/3 test programs. 0/406 subtests failed. 36 make: *** [test_dynamic] Error 2 37 SALVA/Net-OpenSSH-0.77.tar.gz 38 /bin/make test -- NOT OK 39 //hint// to see the cpan-testers results for installing this module, try: 40 reports SALVA/Net-OpenSSH-0.77.tar.gz 41 Running make install 42 make test had returned bad status, won't install without force
解决办法
跟问题2类似，我们使用强大的google很快就能找到解决方案
sudo yum install perl-Digest-MD5 -y
参考
https://github.com/agentzh/sshbatch
http://blog.51cto.com/wanglq/872463
https://superuser.com/questions/1181310/perl-script-cant-locate-env-pm-in-inc
https://stackoverflow.com/questions/34248737/cant-locate-digest-md5-pm-directadmin
