I'm trying to write a bash script using PSSH which sends the same command but different arguments depending on the host. The host name and arguments will be pulled from a different file 'list.txt'.
An example of a 'list.txt' file would look like this:
10.0.0.1;'hello';'world'
10.0.0.2;'goodbye';'everyone'
10.0.0.3;'thank';'you!'
An example of what I currently have (but unfortunately isn't working) is shown below:
#!/bin/bash
# grab the list items and make them into a variable to be able to parse
actionList=$(</root/scripts/list.txt)
# parse out host name for pssh
host_name="$( cut -d ';' -sf 1 <<< "$actionList" )";
# parse out the first argument
argument1="$( cut -d ';' -sf 2 <<< "$actionList" )";
# parse out the second argument
argument2="$( cut -d ';' -sf 3 <<< "$actionList" )";
# pssh command that creates a new file on each server with their respective argument1 and argument2
pssh -i -AH $host_name -t 300 -O StrictHostKeyChecking=no "$(argument1) ' and ' $(argument2) >> arg1_and_arg2.txt"
I'm pretty sure cutting the $actionList variable is not giving me what I want, but what I'm really stuck on is whether that pssh command will run correctly for every item in 'list.txt' after I've parsed out the correct strings from $actionList.
Is there a way to make same command, changing arguments from file work with PSSH? Is there a better program to do this with? If so how? Any help is appreciated.
Thanks!
P.S. If I formatted or did anything wrong with this post, I apologize. StackOverflow is usually my last resort so I don't use it often. Again, thanks for any help/advice!
I think you are better off simply using a loop that runs ssh for each line of the input file.
while IFS=";" read host arg1 arg2; do
echo "$arg1 and $arg2" | ssh "$host" "cat > arg1_and_arg2.txt" &
done < list.txt