82 lines
No EOL
2.5 KiB
Bash
82 lines
No EOL
2.5 KiB
Bash
#!/bin/bash
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HOST_BASE="/opt/gbo/tenants/$PARAM_TENANT/dns"
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HOST_CONF="$HOST_BASE/conf"
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HOST_DATA="$HOST_BASE/data"
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HOST_LOGS="$HOST_BASE/logs"
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mkdir -p "$HOST_BASE" "$HOST_CONF" "$HOST_DATA" "$HOST_LOGS"
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chmod -R 750 "$HOST_BASE"
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# Clear existing rules
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sudo iptables -F
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# Allow DNS traffic
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sudo iptables -A INPUT -p udp --dport 53 -j ACCEPT
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sudo iptables -A INPUT -p tcp --dport 53 -j ACCEPT
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sudo iptables -A FORWARD -p udp --dport 53 -j ACCEPT
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sudo iptables -A FORWARD -p tcp --dport 53 -j ACCEPT
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# Enable NAT
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sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
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# Save rules (if using iptables-persistent)
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sudo netfilter-persistent save
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lxc launch images:debian/12 "${PARAM_TENANT}-dns" -c security.privileged=true
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until lxc exec "${PARAM_TENANT}-dns" -- true; do sleep 3; done
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lxc config device remove pragmatismo-dns dns-udp
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lxc config device remove pragmatismo-dns dns-tcp
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# Forward HOST's public IP:53 → CONTAINER's 0.0.0.0:53
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lxc config device add pragmatismo-dns dns-udp proxy listen=udp:$GB_PUBLIC_IP:53 connect=udp:0.0.0.0:53
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lxc config device add pragmatismo-dns dns-tcp proxy listen=tcp:$GB_PUBLIC_IP:53 connect=tcp:0.0.0.0:53
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lxc exec "${PARAM_TENANT}-dns" -- bash -c "
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mkdir /opt/gbo
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mkdir /opt/gbo/{bin,conf,data,logs}
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echo 'nameserver 8.8.8.8' > /etc/resolv.conf
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apt-get upgrade -y && apt-get install -y wget
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wget -qO /opt/gbo/bin/coredns https://github.com/coredns/coredns/releases/download/v1.11.1/coredns_1.11.1_linux_amd64.tgz
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tar -xzf /opt/gbo/bin/coredns -C /opt/gbo/bin/
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useradd --system --no-create-home --shell /bin/false gbuser
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setcap cap_net_bind_service=+ep /opt/gbo/bin/coredns
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cat > /etc/systemd/system/dns.service <<EOF2
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[Unit]
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Description=DNS
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After=network.target
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[Service]
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User=gbuser
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ExecStart=/opt/gbo/bin/coredns -conf /opt/gbo/conf/Corefile
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Restart=always
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[Install]
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WantedBy=multi-user.target
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EOF2
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systemctl stop systemd-resolved
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systemctl disable systemd-resolved
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rm /etc/resolv.conf
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systemctl daemon-reload
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systemctl enable dns
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"
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GBUSER_UID=$(lxc exec "${PARAM_TENANT}-dns" -- id -u gbuser)
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HOST_UID=$((100000 + GBUSER_UID))
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chown -R "$HOST_UID:$HOST_UID" "$HOST_BASE"
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lxc exec "${PARAM_TENANT}-dns" -- bash -c "
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chown -R gbuser:gbuser /opt/gbo
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"
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lxc config device add "${PARAM_TENANT}-dns" dnsdata disk source="$HOST_DATA" path=/opt/gbo/data
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lxc config device add "${PARAM_TENANT}-dns" dnsconf disk source="$HOST_CONF" path=/opt/gbo/conf
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lxc config device add "${PARAM_TENANT}-dns" dnslogs disk source="$HOST_LOGS" path=/opt/gbo/logs
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lxc exec "${PARAM_TENANT}-dns" -- systemctl start dns |