documentation/Serveurs/mother.md

# Serveur physique `mother` : serveur-mère de l'infrastructure de Libre en Communs

`mother` est un serveur physique hébergé au local de l'association.

Avec `aunt` elles forment le centre névralgique de l'infrastructure de l'association.

### Matériel

Carte mère : 1 × Asus KGPN-D16 Rev 1.03G  
CPU : 2 × AMD Opteron 6282SE  
RAM : 4 × Crucial RDIMM 16Go CT2K16G3ERSLD4160B  
Alimentation : 1 × FSP Twins PRO 500W (500W ATX12V / EPS12V 80PLUS Gold)  
Onduleur : 1 × EATON Ellipse PRO 1600 VA  
Casier : 1 × Inter-Tech IPC 4U-4129-N SSI-EEB (Rack)  
Stockage de masse : 2 × Samsung SSD 870 QVO 2To  

### Logiciel

Micro-programme : Coreboot 4.6 + SeaBIOS, sans blob privateur  
Système d'exploitation : Debian GNU/Linux-libre 11 (Bullseye)  
Noyau : Linux-libre LTS (`linux-libre-lts` des dépôts https://linux-libre.fsfla.org)  
Virtualisation : QEMU/KVM (`libvirt`)  
Gestion du onduleur : NUT/UPS  
Audit des paquets mensuel : `vrms`  
Sécurités de la maintenance : `etckeeper`, `mollyguard`, `tig`, `lm-sensors`, `fancontrol`, `screen`  
Mail Transfer Agent : `postfix`  
Réplication de stockage (vm) : `drbd`, `ocfs2`  

### Caractéristiques notables

Domaine : mother.libre-en-communs.org  
Adresse ipv4 publique : 80.67.176.33  
Adresse ipv4 locale : 192.168.1.108  
Adresse ipv6 publique : 2001:910:1021::2

#### Configuration réseau

##### /etc/network/interfaces
<details>

    # Connexion avec la machine aunt
    allow-hotplug ens9
    iface ens9 inet static
            address 192.169.254.2

    post-up /usr/bin/ip link set ens9 mtu 9000

    # Connexion avec le routeur (bridge sur ens10 avec les VM présentes)
    allow-hotplug ens10
    auto br0
    iface br0 inet dhcp
            bridge_ports ens10

    iface br0 inet6 static
            bridge_ports ens10
            address 2001:910:1021::2/128
            gateway 2001:910:1021::1
            bridge_stp off       # désactivation du Spanning Tree Protocol
            bridge_waitport 0    # suppression du délai avant que le port soit disponible pour le bridge
            bridge_fd 0          # suppression de délai avant que le forwarding du bridge soit établi

</details>

### Configuration SSH

#### /etc/ssh/sshd_config
<details>

    #	$OpenBSD: sshd_config,v 1.103 2018/04/09 20:41:22 tj Exp $

    # This is the sshd server system-wide configuration file.  See
    # sshd_config(5) for more information.

    # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin

    # The strategy used for options in the default sshd_config shipped with
    # OpenSSH is to specify options with their default value where
    # possible, but leave them commented.  Uncommented options override the
    # default value.

    Port 222
    AddressFamily any
    ListenAddress 0.0.0.0
    ListenAddress ::

    PubkeyAuthentication no

    PasswordAuthentication no
    PermitEmptyPasswords no

    ChallengeResponseAuthentication no

    UsePAM yes

    AllowAgentForwarding yes
    AllowTcpForwarding yes
    GatewayPorts yes
    X11Forwarding no

    PrintMotd no

    TCPKeepAlive yes

    PermitTunnel yes

    AcceptEnv LANG LC_* GIT_*

    Subsystem	sftp	/usr/lib/openssh/sftp-server

    Match Group ssh-pubkey
        PubkeyAuthentication yes

    Match Group ssh-login
        PasswordAuthentication yes
        PubkeyAuthentication yes

    Match Address 127.0.0.*
        PubkeyAuthentication yes  

    Match Address 192.169.254.3
        PubkeyAuthentication yes
</details>

### Configuration DRBD

#### /etc/drbd.d/drbd1.res
<details>

    resource drbd1 {
        meta-disk internal;
        device /dev/drbd1;

        startup {
                wfc-timeout 20;
                become-primary-on both;
        }
        net {
                verify-alg sha256;
                allow-two-primaries yes;
                max-buffers 10k;
                max-epoch-size 10k;
                unplug-watermark 32;
                sndbuf-size 0;
                rcvbuf-size 0;
        }
        disk {
                on-io-error detach;
                #no-disk-flushes;
                #no-disk-barrier;
                c-plan-ahead 10;
                c-fill-target 150M;
                c-min-rate 10k;
                c-max-rate 500M;
        }

        on mother {                            # hostname must match `uname -n` output
                disk /dev/md1;                        # Logical Volume on the provided host
                address 192.169.254.2:7789;           # IP Address to be used to connect to the node with port
        }

        on aunt {                              # hostname must match `uname -n` output
                disk /dev/md1;                        # Logical Volume on the provided host
                address 192.169.254.3:7789;           # IP Address to be used to connect to the node with port
        }
    }

</details>

#### /etc/ocfs2/cluster.conf
<details>

    cluster:
        name = sharedfs
        heartbeat_mode = local
        node_count = 2

    node:
        cluster = sharedfs
        number = 0
        ip_port = 7777
        ip_address = 192.169.254.3
        name = aunt

    node:
        cluster = sharedfs
        number = 1
        ip_port = 7777
        ip_address = 192.169.254.2
        name = mother

</details>

### Configuration MTA

#### /etc/postfix/transport

    a-lec.org    :
    *              discard:

#### /etc/postfix/virtual

    @localhost admin@a-lec.org
    @mother.libre-en-communs.org admin@a-lec.org