Auto generate your i2cssh configuration based on your ~/.ssh/know_hosts

auto-i2cssh.sh

#!/bin/bash
known_hosts="${HOME}/.ssh/known_hosts"
i2csshrc="${HOME}/.i2csshrc"
tmpfile="/tmp/i2csshrc"
envs="tst acc xpr pro adm shd dev"
echo -e "---\nversion: 2\nclusters:" > ${tmpfile}
sorted_unique_clusters=$(grep -e "^[a-z][a-z][a-z]-.*-[0-9][0-9][0-9]" ${known_hosts} | sed -e 's/-[0-9][0-9][0-9].*//g' -e 's/^[a-z][a-z][a-z]-//g' | sort | uniq)
for cluster in ${sorted_unique_clusters}; do
  cluster_hosts=""
  for env in ${envs}
  do
    hosts=$(grep "^${env}-${cluster}-" ${known_hosts} | sed -e 's/[\., ].*//g' | sort | uniq)
    if [[ ! -z ${hosts} ]]; then
      echo -e "  ${env}-${cluster}:\n    rows: 2\n    hosts:" >> ${tmpfile}
      cluster_hosts+="$hosts "
      for host in ${hosts}
      do
        echo -e "      - ${host}" >> ${tmpfile}
      done
    fi
  done
  if [[ ! -z $cluster_hosts ]]; then
    echo -e "  ${cluster}:\n    rows: 2\n    hosts:" >> ${tmpfile}
    for host in $cluster_hosts; do
      echo -e "      - ${host}" >> ${tmpfile}
    done
  fi
done
mv ${tmpfile} ${i2csshrc}