[SOLVED] How to make the ssh with -o StrictHostKeyChecking=no running on the docker in order to ssh the host work without exiting the script execution?

Issue

I have a script, that is running inside the docker container some actions we need for some internal debugging purposes:

set -eu
echo "Starting i/o test for host"
IP_HOST=$(ip a | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b" | grep 172.17 | awk 'NR==1{print $1}')
echo "Detected IP of host is $IP_HOST"
sshpass -p tcuser ssh -o StrictHostKeyChecking=no docker@localhost -t -t
echo "Then"

the output here produce exactly:

bash-5.0# sh /etc/cron.d/iotesthost.sh
Mon Mar  2 12:43:59 UTC 2020
Starting i/o test for host
Detected IP of host is 172.17.0.1
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
   ( '>')
  /) TC (\   Core is distributed with ABSOLUTELY NO WARRANTY.
 (/-_--_-\)           www.tinycorelinux.net

and as the last line is reached, the script makes me exiting bash or crond execution. So I can't go ahead with processing other lines after sshpass/ssh, so I never reach echo "Then"

That is the reason of exiting the script execution and how to work it around, still keeping all the features of accepting keys (i need is as each time the docker container calls for the script it is new)

If I ignore -t -t, I'm getting error according to https://stackoverflow.com/a/7122115/1759063

Solution

see https://askubuntu.com/questions/87449/how-to-disable-strict-host-key-checking-in-ssh

or

echo "StrictHostKeyChecking no" >> /etc/ssh_config

for a global solution. Please note that there is no security check anymore then.

Answered By - Wolfgang Fahl

Answer Checked By - Senaida (WPSolving Volunteer)