#!/usr/bin/env bash

#
# Register all Hâpy Cluster Nodes
#

. /usr/lib/eole/ihm.sh

#
# NAME: copy_ssh_id
# AIM: Copy the ssh key on the host
# PARAM: the hostname of the node
#
function copy_ssh_id()
{
    local host=${1}

    CLEF=$(cat ~oneadmin/.ssh/id_rsa.pub)
    ssh ${host} bash <<EOF
if ! grep -qs "$CLEF" ~oneadmin/.ssh/authorized_keys; then
    echo "$CLEF" >> ~oneadmin/.ssh/authorized_keys
    chown oneadmin:oneadmin ~oneadmin/.ssh/authorized_keys
    su - oneadmin -c "ssh-keyscan $host"
    cat ~oneadmin/.ssh/id_rsa.pub >> ~oneadmin/.ssh/authorized_keys
fi
EOF
    [[ ${?} -ne 0 ]] && EchoRouge "Erreur lors de l'échange de clés SSH avec le noeud ${host}"
    REMOTEKEY=$(su - oneadmin -c "ssh ${host} 'cat ~oneadmin/.ssh/id_rsa.pub'")
    if ! grep -qs "$REMOTEKEY" ~oneadmin/.ssh/authorized_keys; then
        su - oneadmin -c "echo ${REMOTEKEY} >> ~oneadmin/.ssh/authorized_keys"
        su - oneadmin -c "ssh-keyscan $host"
    fi
}

function copy_files()
{
    local host=${1}
    su - oneadmin -c "scp .one/* ${host}:.one/"
}


#
# NAME: sync_db
# AIM: Sync onedb in HA and sqlite mode
# PARAM: the hostname of the node
#
function sync_db()
{
    local ip=${1}
    local user="oneadmin"
    local DBFILE="/var/lib/one/one.db"
    local DBBCK="/tmp/one.db.bck"
    local ret=0

    if [[ ! -f ${DBBCK} ]]
    then
        cmd="onedb backup --sqlite ${DBFILE} ${DBBCK}"
        ret=$(su - ${user} -c -- "${cmd}")
    fi

    cmd2="scp ${DBBCK} ${ip}:${DBFILE}.leader"
    ret=$(su - ${user} -c -- "${cmd2}")
    return ${?}
}

#
# NAME: sync_nodes
# AIM: force nodes sync with rsync (ONE 5.6.1 bug)
# PARAM: none
#
function sync_nodes()
{
    # Need to sync hosts with rsync after creation, ONE 5.6.1 bug
    cmd2="onehost sync -f --rsync"
    ret2=$(su - ${ONEUSER} -c -- "${cmd2}")
    return ${?}
}

#
# NAME: register_node
# AIM: register the node in OpenNebula master
# PARAM: the node hostname
#
function register_node()
{
    cmd="onehost create -i kvm -v kvm -c 0 ${1}"

    ret=$(su - ${ONEUSER} -c -- "${cmd}")
    if [[ ${?} -ne 0  ]]
    then
        EchoRouge "Hosts register failed $res"
    else
        EchoVert "Hosts register OK"
    fi
}


#
# NAME: wait_node_ok
# AIM: Wait until the node is OK or ERROR
# PARAM: The node name
#
function wait_node_ok()
{
    local cmd="onehost show ${1} | awk '/^STATE/ {print \$3}'"
    local spinstr='|/-\'
    local delay=0.75
    local cnt=0

    while [ 1 ]
    do
        st=$(su - ${ONEUSER} -c "${cmd}")
        [[ ${st} == "MONITORED" ]] && break
        [[ ${st} == '' ]] && break
        if [[ ${st} == "ERROR" ]]
        then
            if [ $cnt -gt 160 ]; then
                EchoRouge "Erreur lors de l'enregistrement du noeud ${host} !"
                break
            fi
        fi

        local temp=${spinstr#?}
        printf " [%c]  " "$spinstr"
        local spinstr=$temp${spinstr%"$temp"}
        sleep $delay
        printf "\b\b\b\b\b\b"
        cnt=$((cnt+1))
    done
    printf "    \b\b\b\b"
}

function init_ha_leader() {
    # server with index 1 exists if already instanciate
    onezone show 0 | grep -A 3 ^"HA & FEDERATION SYNC STATUS" | tail -n 1 | grep -q ^" 1 "
    if [ ! $? = 0 ]; then
        FOLLOWER=$(CreoleGet one_nodes)
        for follower in $FOLLOWER; do
            onezone server-add 0 --name $follower --rpc http://$follower:2633/RPC2
        done
    fi
}

#
# MAIN
#
HAPY_ACTIF=$(echo $(CreoleGet activer_onesinglenode))
if [[ $HAPY_ACTIF == "non" ]]
then
    EchoRouge "Le serveur de virtualisation n'est pas activé dans l'interface de configuration du module"
    exit 1
fi

HAPY_NODE_SUPPORT=$(echo $(CreoleGet activer_multinode))
if [[ $HAPY_NODE_SUPPORT == "non" ]]
then
    EchoRouge "Le mode multi-noeuds n'est pas activé dans l'interface de configuration du module"
    exit 1
fi

HAPY_HA=$(CreoleGet activer_one_ha "non")

declare -a HAPY_SLV=('')
ONEUSER=$(CreoleGet virt_user)
HAPY_SLV=$(echo $(CreoleGet one_nodes) | sed -e "s/\n/ /g")
DBMODE=$(CreoleGet one_database_type "none")

echo -e "\n"
EchoBleu "Vous allez inscrire un noeud dans une grappe Hâpy"
EchoBleu "Pour ce faire vous devez vous munir du mot de passe de l'utilisateur 'oneadmin' de chacun des noeuds"
Question_ouinon  "Voulez-vous commencer ?" 'True' "oui"
if [[ $? -ne 0 ]]
then
    EchoOrange "Abandon de l'enregistrement"
    exit 1
fi

master=1
if [ "$(CreoleGet activer_one_ha)" = "oui" ]; then
    if [ "$(CreoleGet one_ha_server_index)" != "0" ]; then
        exit 0
    else
        master=0
    fi
fi
for host in ${HAPY_SLV}; do
    echo -e "\n"
    EchoOrange "Traitement du noeud ${host}"
    echo
    EchoVert " * Gestion des clés SSH"
    echo
    copy_ssh_id ${host}
    if [ $master = 0 ]; then
        copy_files ${host}
    fi

    EchoVert " * Enregistrement du noeud"
    register_node ${host}
    # wait_node_ok ${host}
    if [[ ${HAPY_HA} == "oui" ]]
    then
        if [[ $DBMODE == "sqlite" ]]
        then
            if [[ $(CreoleGet one_ha_server_index) == "0" ]]
            then
                sync_db ${host}
            fi
        fi
    fi
    sync_nodes
    wait_node_ok ${HAPY_SLV[${i}]}
    if [[ ${?} -ne 0 ]]
    then
        EchoRouge "Erreur lors de l'enregistrement du noeud ${HAPY_SLV[${i}]} !"
    fi
done

if [ $master = 0 ]; then
    init_ha_leader
fi
echo -e "\n"
EchoVert "Enregistrement des noeuds terminé"