Use ssh client and bash scripts to easily manage multiple hosts

 

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Pay tribute to the earnest and responsible work attitude of the blog community team!

Because the same article appears twice on the blog homepage, I have removed the previous article from the homepage. 

 

SlaveServer.conf

1 #global var: glServerList2 glServerList="192.168.31.98 \3               192.168.31.3  \4               192.168.31.4  \5               192.168.31.5  \6               192.168.31.6"

RSAPublicKeyBroadCast.sh

 1 #!/bin/bash 2  3 . SlaveServer.conf 4  5 function SSH_RSAPublicKeyBroadCast () { 6   # $1 : sshd port like : 3198 7   ssh-keygen 8   declare RSApk_path=/root/.ssh/id_rsa.pub 9   declare clientRSApk=`cat ${RSApk_path}`10   declare i11   for i in $glServerList12   do13     echo "communicating via ssh with $i ... ..."14     ssh -o GSSAPIAuthentication=no -p "$1" root@${i} "mkdir ~/.ssh ; echo ${clientRSApk} >> ~/.ssh/authorized_keys"15   done16 }17 SSH_RSAPublicKeyBroadCast "$1"

Second tool:

FileBroadCast.sh

 1  #!/bin/bash 2  3 . SlaveServer.conf 4  5 function SSH_FileBroadCast () { 6 # $1 : sshd port like : 3198 7 # $2 : src :local file path like /etc/ssh/sshd_config 8 # $3 : dest: remote server file path like /etc/ssh/sshd_config  9 declare i10 for i in $glServerList11 do12   echo "communicating via ssh with $i ... ..."13   scp -o GSSAPIAuthentication=no -P "$1" "$2" root@${i}:${3}  14 done15 }16 17 SSH_FileBroadCast "$1" "$2" "$3"

Third tool:

  

CommandBroadCast.sh

 1 #!/bin/bash 2   3 . SlaveServer.conf 4  5 function SSH_CommandBroadCast () { 6 # $1 : sshd port like : 3198 7 # $2 : command like ' service sshd reload ' 8 declare i 9 for i in $glServerList10 do11   echo "communicating via ssh with $i ... ..."12   ssh -o GSSAPIAuthentication=no -p "$1" root@${i} "${2}"13 done14 }15 16 SSH_CommandBroadCast "$1" "$2"

Fourth tool:

AllSlaveExecLocalScripts.sh

#!/bin/bash. SlaveServer.conffunction SSH_RemoteServerExecLocalScripts () {# $1 remoteServerArgs like: root@192.168.31.2# $2 remoteServer SSH Daemon's port like: 3198# $3 local bash scripts you want the remoteServer to execdeclare tempFile=`mktemp` #local tmp declare remoteTmpDirif ssh -o GSSAPIAuthentication=no -p "$2" "$1" 'declare tempDir=`mktemp -d` ; chmod 700 $tempDir ; chown root:root $tempDir ; cd $tempDir ; unset tempDir ; pwd ' 1> $tempFile then  remoteTmpDir=`tail -1 $tempFile`  scp -o GSSAPIAuthentication=no -P "$2" "$3" ${1}:$remoteTmpDir 1>/dev/null  ssh -o GSSAPIAuthentication=no -p "$2" "$1" " bash ${remoteTmpDir}/* ; rm -fr ${remoteTmpDir} "  rm -f $tempFile  return 0else  rm -f $tempFile  echo "connect error:exit"  return 1fi}function SSH_BroadCastExecLocalScripts () {# $1 : sshd port like : 3198# $2 local bash scripts you want the remoteServer to execdeclare ifor i in $glServerListdo  echo "communicating via ssh with $i ... ..."  SSH_RemoteServerExecLocalScripts "$i" "$1" "$2"done  }SSH_BroadCastExecLocalScripts "$1" "$2"

 

Appendix:

For details about the configuration of the experiment environment, refer to the article "Building a complete DNS system.

Sh

1 #!/bin/bash2 3 declare host_ip=`ifconfig | grep -Eo 'inet addr:\<(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))\>' | grep -Eo '\<(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))\>' | head -1`4 5 echo "host ip is : $host_ip"6 7 mpstat

So far, our tool experiment has ended. If you have any questions or suggestions, please discuss them :)