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Debian – MariaDB cluster with Galera-Abitrator-4 [gcs_proto_ver: 3]

M1,M2,M3 are 3 machines running Debian GNU/Linux 11 (bullseye)
recently (june2024) .

After apt update & upgrade
M1 & M2 are MariaDB nodes Ver 15.1 Distrib 10.6.18-MariaDB
and. M3 is arbitrator using galera-arbitrator-4 Ver 4.11.r

The problem is M3 because garbd joins the cluster (/var/log/syslog), but after 2s fails with
FATAL: ./gcs/src/gcs_group.cpp:group_check_proto_ver():329: Group requested gcs_proto_ver: 3, max supported by this node: 2.Upgrade the node before joining this group.Need to abort.

I didn’t found any config for garbd to set gcs_proto_ver in /etc/defaults/garbd
or a source for galera-arbitrator to change code and recompile

Hopefully there is someone there with an elegant solution to avoid installing MariaDB as 3rd node on M3.

Thanks

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2

Answers


  1. Chosen as BEST ANSWER
    0

    got it !!!

    for gcs_proto_ver:3 the garbd 4.18 is needed so:

    apt remove galera-4 galera-arbitrator-4  #cleaning

    since Debian repositorie is not updated navigate to galeracluster sourcess

    cd /tmp
# --- get packages ---
wget https://releases.galeracluster.com/galera-4/debian/pool/main/g/galera-4/galera-4_26.4.18%2B1bullseye_amd64.deb
wget https://releases.galeracluster.com/galera-4/debian/pool/main/g/galera-4/galera-arbitrator-4_26.4.18%2B1bullseye_amd64.deb
# --- install ----
apt install ./galera-4_26.4.18+1bullseye_amd64.deb
apt install ./galera-arbitrator-4_26.4.18+1bullseye_amd64.deb
# --- if any warning reports about dependencies ---
apt install --fix-broken

    assuming the sevice is still enabled (else systemctl enable garbd) and cluster config exists (else nano /etc/default/garb) just:

    systemctl start garbd # iupi :)))#

  2. 0

    using the default repo’s from ubuntu, you will install an old version of arbitrator.

    Update your sources regarding to this site:

    https://mariadb.org/download/?t=repo-config&d=22.04+%22jammy%22&v=11.4&r_m=mva

    After that, run

    apt-get update
apt-get upgrade

    it will fetch the newest packages.

    If you did not have arbitrator installed yet, install it:

    apt-get install galera-4 galera-arbitrator-4

    🙂

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