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#!/bin/sh
NO_COL="\033[0m"
GREEN="\033[1;32m"
usage() {
echo "$(basename "$0"): run a command on multiple nodes"
echo ""
echo "$(basename "$0") [-h] [-p] <cluster> <role> <command>"
echo ""
echo "-h --help show this help"
echo "-p --parallel run command on all nodes in parallel (default is sequential)"
echo "<cluster> the name of the cluster"
echo "<role> the role of the node(s), or 'all'"
echo "<command> the command to run"
echo ""
echo "Example: $(basename "$0") mycluster controller uptime"
echo " $(basename "$0") -p mycluster all cat /etc/hostname"
}
green_echo () {
echo "${GREEN}${1}${NO_COL}"
}
sshi () {
unset SSH_AUTH_SOCK
ssh -i /etc/openstack-cluster-installer/id_rsa -o ConnectTimeout=10 "$@"
}
iterate_on_hosts () {
# copied from /usr/bin/oci-cluster-upgrade-openstack-release
if [ "${1}" = "-p" ] || [ "${1}" = "--parallel" ] ; then
USE_PARALLEL=yes
shift
else
USE_PARALLEL=no
fi
HOST_LIST=${1}
FUNCTION=${2}
shift
shift
MAX_PARALLEL=8
if [ "${USE_PARALLEL}" = "yes" ] ; then
CNT=1
for i in ${HOST_LIST} ; do
${FUNCTION} "${i}" "$@" &
CNT=$(( ${CNT} + 1))
if [ ${CNT} -gt ${MAX_PARALLEL} ] ; then
CNT=1
wait
fi
done
wait
else
for i in ${HOST_LIST} ; do
${FUNCTION} "${i}" "$@"
done
fi
}
ssh_on_nodes () {
HOST=${1}
shift
HOST_IP=$(echo "${HOST}" | cut -d, -f1)
HOST_NAME=$(echo "${HOST}" | cut -d, -f2)
green_echo "-> ${HOST_NAME}"
sshi "root@${HOST_IP}" "$@"
}
parallel=""
CLUSTER_NAME=$1
shift
case "${CLUSTER_NAME}" in
"-h"|"--help")
usage
exit
;;
"-p"|"--parallel")
parallel="-p"
CLUSTER_NAME=$1
shift
;;
*)
;;
esac
role=$1
shift
cmd="$*"
green_echo "---> Fetching nodes info"
if [ "$role" = "all" ]; then
where=""
else
where="role='$role' AND"
fi
NODES=$(ocicli -csv machine-list -a | q -H -d, "SELECT Cur_ip,hostname FROM - WHERE $where cluster='${CLUSTER_NAME}' AND status='installed' ORDER BY hostname" | tr '\n' ' ')
if [ -z "$NODES" ]; then
echo "Unable to find nodes of type '$role' on cluster '$CLUSTER_NAME'" > /dev/stderr
exit 1
fi
green_echo "---> Running command"
iterate_on_hosts $parallel "${NODES}" ssh_on_nodes "$cmd"
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