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galera-ansible's Introduction

Installazione Cluster Mariadb Galera

Prerequisiti

Assicurarsi che sulle macchine sia presente:

  • la scheda di interconnessione
  • un disco dedicato hai dati del Db
  • che siano stati dati gli ip a tutte le schede di rete

Installazione e configurazione iniziale dei nodi

  • fare il download con git clone

  • modificare il file galera.hosts con gli ip degli host da raggiungere

  • modificare le variabili sotto group_vars/all/vars.yml

    datadev_name: sdb
    mysql_dir: "/mysql/data"
    mariarelease: 10.4
    galeraclusterid: 1
    galeraclustername: "nome del cluster"
    galerainterconnectinterface: "nome device di interconnesione di solito ens192"
    sst_user: galera1
    sst_pass: galera1
    node_ips: "tutti gli ip di interconnessione separati dalla virgola"

  • fare un accesso in ssh sugli host da raggiungere per rispondere "yes" alla domanda degli "host conosciuti"

  • lanciare lo script ansible e alla richiesta delle credenziali mettere quelle di root dei nodi:

    ansible-playbook -i galera.hosts galera.yml -k

!! N.B.!! Prima di effettuare il bootstrap lanciare la SECURE INSTALLATION su entrambi i nodi del cluster

Bootstrapping MariaDB Galera cluster

  • lanciare lo script ansible e alla richiesta delle credenziali mettere quelle di root dei nodi:

    ansible-playbook -i galera.hosts galera_bootstrap.yml -k

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