1 files changed, 38 insertions, 0 deletions
diff --git a/misc/scripts/make_netns_per_upstream.sh b/misc/scripts/make_netns_per_upstream.sh
new file mode 100644
index 0000000..fb152fa
--- /dev/null
+++ b/misc/scripts/make_netns_per_upstream.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+set -x
+set -e
+
+get_default_iface() {
+	ip -4 r show default | awk '{print $5}'
+}
+
+declare -A UPSTREAMS=(
+	[mtsil]=102
+	[mtsazov]=100
+	[rtazov]=101
+)
+
+for name in "${!UPSTREAMS[@]}"; do
+	mark=${UPSTREAMS[$name]}
+	veth_addr=10.${mark}.1.1
+	vpeer_addr=10.${mark}.1.2
+	veth_if=veth${name}
+	vpeer_if=vpeer${name}
+
+	ip netns add $name
+	ip link add $veth_if type veth peer name $vpeer_if
+	ip link set $vpeer_if netns $name
+	ip addr add $veth_addr/24 dev $veth_if
+	ip link set $veth_if up
+
+	ip netns exec $name ip addr add $vpeer_addr/24 dev $vpeer_if
+	ip netns exec $name ip link set $vpeer_if up
+	ip netns exec $name ip link set lo up
+	ip netns exec $name ip route add default via $veth_addr
+
+	iptables -t mangle -A PREROUTING -s $vpeer_addr/24 -j MARK --set-mark $mark
+	iptables -t nat -A POSTROUTING -s $vpeer_addr/24 -o "$(get_default_iface)" -j MASQUERADE
+done
+
+sysctl net.ipv4.ip_forward=1