Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 1 | local kube = import "../../../kube/kube.libsonnet"; |
| 2 | |
| 3 | { |
radex | c995c21 | 2023-11-24 12:01:49 +0100 | [diff] [blame^] | 4 | local top = self, |
| 5 | local cfg = top.cfg, |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 6 | cfg:: { |
| 7 | image: error "cfg.image must be set", |
| 8 | realm: error "cfg.realm must be set", |
| 9 | authSecret: error "cfg.authSecret must be set", |
| 10 | storageClassName: error "cfg.storageClassName must be set", |
| 11 | |
| 12 | portStart: 49152, |
| 13 | portEnd: 49172, |
| 14 | loadBalancerIP: null, |
| 15 | }, |
| 16 | |
| 17 | ns:: error "ns needs to be provided", |
radex | c995c21 | 2023-11-24 12:01:49 +0100 | [diff] [blame^] | 18 | local ns = top.ns, |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 19 | |
radex | 99ed6a7 | 2023-11-24 11:42:55 +0100 | [diff] [blame] | 20 | configMap: ns.Contain(kube.ConfigMap("coturn")) { |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 21 | data: { |
| 22 | "coturn.conf": ||| |
| 23 | # VoIP traffic is all UDP. There is no reason to let users connect to arbitrary TCP endpoints via the relay. |
| 24 | no-tcp-relay |
| 25 | |
| 26 | no-tls |
| 27 | no-dtls |
| 28 | |
| 29 | # don't let the relay ever try to connect to private IP address ranges within your network (if any) |
| 30 | # given the turn server is likely behind your firewall, remember to include any privileged public IPs too. |
| 31 | denied-peer-ip=10.0.0.0-10.255.255.255 |
| 32 | denied-peer-ip=192.168.0.0-192.168.255.255 |
| 33 | denied-peer-ip=172.16.0.0-172.31.255.255 |
| 34 | |
| 35 | # recommended additional local peers to block, to mitigate external access to internal services. |
| 36 | # https://www.rtcsec.com/article/slack-webrtc-turn-compromise-and-bug-bounty/#how-to-fix-an-open-turn-relay-to-address-this-vulnerability |
| 37 | no-multicast-peers |
| 38 | denied-peer-ip=0.0.0.0-0.255.255.255 |
| 39 | denied-peer-ip=100.64.0.0-100.127.255.255 |
| 40 | denied-peer-ip=127.0.0.0-127.255.255.255 |
| 41 | denied-peer-ip=169.254.0.0-169.254.255.255 |
| 42 | denied-peer-ip=192.0.0.0-192.0.0.255 |
| 43 | denied-peer-ip=192.0.2.0-192.0.2.255 |
| 44 | denied-peer-ip=192.88.99.0-192.88.99.255 |
| 45 | denied-peer-ip=198.18.0.0-198.19.255.255 |
| 46 | denied-peer-ip=198.51.100.0-198.51.100.255 |
| 47 | denied-peer-ip=203.0.113.0-203.0.113.255 |
| 48 | denied-peer-ip=240.0.0.0-255.255.255.255 |
| 49 | |
| 50 | # special case the turn server itself so that client->TURN->TURN->client flows work |
| 51 | # this should be one of the turn server's listening IPs |
| 52 | # FIXME allowed-peer-ip=10.0.0.1 |
| 53 | |
| 54 | # consider whether you want to limit the quota of relayed streams per user (or total) to avoid risk of DoS. |
| 55 | user-quota=12 # 4 streams per video call, so 12 streams = 3 simultaneous relayed calls per user. |
| 56 | total-quota=1200 |
| 57 | |
| 58 | use-auth-secret |
| 59 | |||, |
| 60 | }, |
| 61 | }, |
| 62 | |
radex | 99ed6a7 | 2023-11-24 11:42:55 +0100 | [diff] [blame] | 63 | dataVolume: ns.Contain(kube.PersistentVolumeClaim("coturn-data")) { |
radex | 36964dc | 2023-11-24 11:19:46 +0100 | [diff] [blame] | 64 | storage:: "10Gi", |
| 65 | storageClass:: cfg.storageClassName, |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 66 | }, |
| 67 | |
radex | 99ed6a7 | 2023-11-24 11:42:55 +0100 | [diff] [blame] | 68 | deployment: ns.Contain(kube.Deployment("coturn")) { |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 69 | spec+: { |
| 70 | replicas: 1, |
| 71 | template+: { |
| 72 | spec+: { |
| 73 | volumes_: { |
radex | c995c21 | 2023-11-24 12:01:49 +0100 | [diff] [blame^] | 74 | config: kube.ConfigMapVolume(top.configMap), |
| 75 | data: kube.PersistentVolumeClaimVolume(top.dataVolume), |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 76 | }, |
| 77 | containers_: { |
| 78 | coturn: kube.Container("coturn") { |
| 79 | image: cfg.image, |
| 80 | ports_: { |
| 81 | turn: { containerPort: 3478 }, |
| 82 | } + { |
| 83 | ["fwd-%d" % [n]]: { containerPort: n } |
| 84 | for n in std.range(cfg.portStart, cfg.portEnd) |
| 85 | }, |
| 86 | |
| 87 | command: [ |
| 88 | # This disgusting hack comes from the fact that |
| 89 | # official coturn containers have turnserver |
| 90 | # binary set up with CAP_NET_BIND_SERVICE=+ep, |
| 91 | # while there's really no use that in our case. |
| 92 | # |
| 93 | # Due to our PSP we can't exec said binary, nor |
| 94 | # can we chmod/chown/setcap on it, as we are |
| 95 | # running as an unprivileged user. |
| 96 | # |
| 97 | # Copying it over is the easiest method of |
| 98 | # stripping said spurious cap. |
| 99 | "/bin/sh", "-c", |
| 100 | "cp /usr/bin/turnserver /tmp/turnserver && \\ |
| 101 | exec /tmp/turnserver \\ |
| 102 | -c /config/coturn.conf \\ |
| 103 | --log-binding \\ |
| 104 | --realm=$(COTURN_REALM) \\ |
| 105 | --static-auth-secret=$(COTRN_STATIC_AUTH_SECRET) \\ |
| 106 | --min-port $(COTURN_MIN_PORT) \\ |
| 107 | --max-port $(COTURN_MAX_PORT) \\ |
| 108 | " + if cfg.loadBalancerIP != null then "-X $(COTURN_EXTERNAL_IP)" else "", |
| 109 | ], |
| 110 | volumeMounts_: { |
| 111 | config: { mountPath: "/config" }, |
| 112 | data: { mountPath: "/var/lib/coturn" }, |
| 113 | }, |
| 114 | env_: { |
| 115 | COTURN_REALM: cfg.realm, |
| 116 | COTURN_STATIC_AUTH_SECRET: cfg.authSecret, |
| 117 | COTURN_EXTERNAL_IP: cfg.loadBalancerIP, |
| 118 | COTURN_MIN_PORT: cfg.portStart, |
| 119 | COTURN_MAX_PORT: cfg.portEnd, |
| 120 | }, |
| 121 | }, |
| 122 | }, |
| 123 | securityContext: { |
| 124 | runAsUser: 1000, |
| 125 | runAsGroup: 1000, |
| 126 | fsGroup: 2000, |
| 127 | }, |
| 128 | }, |
| 129 | }, |
| 130 | }, |
| 131 | }, |
| 132 | |
radex | 99ed6a7 | 2023-11-24 11:42:55 +0100 | [diff] [blame] | 133 | svcTCP: ns.Contain(kube.Service("coturn-tcp")) { |
radex | c995c21 | 2023-11-24 12:01:49 +0100 | [diff] [blame^] | 134 | target:: top.deployment, |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 135 | metadata+: { |
| 136 | annotations+: { |
| 137 | "metallb.universe.tf/allow-shared-ip": "coturn", |
| 138 | }, |
| 139 | }, |
| 140 | spec+: { |
| 141 | type: "LoadBalancer", |
| 142 | loadBalancerIP: cfg.loadBalancerIP, |
| 143 | externalTrafficPolicy: "Local", |
| 144 | ports: [ |
| 145 | { name: "turn", port: 3478, protocol: "TCP" }, |
| 146 | ] + [ |
| 147 | { name: "fwd-%d" % [n], port: n, protocol: "TCP" } |
| 148 | for n in std.range(cfg.portStart, cfg.portEnd) |
| 149 | ], |
| 150 | }, |
| 151 | }, |
| 152 | |
radex | 99ed6a7 | 2023-11-24 11:42:55 +0100 | [diff] [blame] | 153 | svcUDP: ns.Contain(kube.Service("coturn-udp")) { |
radex | c995c21 | 2023-11-24 12:01:49 +0100 | [diff] [blame^] | 154 | target:: top.deployment, |
Piotr Dobrowolski | 690ed45 | 2022-05-07 11:27:24 +0200 | [diff] [blame] | 155 | metadata+: { |
| 156 | annotations+: { |
| 157 | "metallb.universe.tf/allow-shared-ip": "coturn", |
| 158 | }, |
| 159 | }, |
| 160 | spec+: { |
| 161 | type: "LoadBalancer", |
| 162 | loadBalancerIP: cfg.loadBalancerIP, |
| 163 | externalTrafficPolicy: "Local", |
| 164 | ports: [ |
| 165 | { name: "turn", port: 3478, protocol: "UDP" }, |
| 166 | ] + [ |
| 167 | { name: "fwd-%d" % [n], port: n, protocol: "UDP" } |
| 168 | for n in std.range(cfg.portStart, cfg.portEnd) |
| 169 | ], |
| 170 | }, |
| 171 | }, |
| 172 | } |