feat: Run testcases in parallel

This PR lets testcases run in parallel to speed up things. On my Mac, 16 parallel tests take 196.31 seconds instead of 645.86 seconds with `--parallel 1`.

The main changes here are to allocate sepearate subnets for each testcase run, so Docker can keep them separated. We also need to pass that network configration into the simulator via environment variables.

We're also collecting log messages during the tests and print them after a test ends, to reduce interleaved output.

Depends on quic-interop/quic-network-simulator#143

Author: larseggert

docker-compose.yml

@@ -1,33 +1,45 @@
 services:
   sim:
     image: martenseemann/quic-network-simulator
-    container_name: sim
     hostname: sim
     stdin_open: true
     tty: true
     environment:
       - WAITFORSERVER=$WAITFORSERVER
       - SCENARIO=$SCENARIO
+      - CLIENT_V4_ADDR=${CLIENT_V4_ADDR}
+      - CLIENT_V4_GATEWAY=${CLIENT_V4_NET}.2
+      - CLIENT_V6_ADDR=${CLIENT_V6_ADDR}
+      - CLIENT_V6_GATEWAY=${CLIENT_V6_NET}::2
+      - SERVER_V4_ADDR=${SERVER_V4_ADDR}
+      - SERVER_V4_GATEWAY=${SERVER_V4_NET}.2
+      - SERVER_V6_ADDR=${SERVER_V6_ADDR}
+      - SERVER_V6_GATEWAY=${SERVER_V6_NET}::2
+      - SUBNET_V4=${SUBNET_V4}
+      - SUBNET_V6=${SUBNET_V6}
+      - V4_PREFIX=${V4_PREFIX}
+      - V6_PREFIX=${V6_PREFIX}
+      - LEFTNET_NAME=eth0
+      - RIGHTNET_NAME=eth1
     cap_add:
       - NET_ADMIN
       - NET_RAW
     expose:
       - "57832"
     networks:
       leftnet:
-        ipv4_address: 193.167.0.2
-        ipv6_address: fd00:cafe:cafe:0::2
+        ipv4_address: ${CLIENT_V4_NET}.2
+        ipv6_address: ${CLIENT_V6_NET}::2
         interface_name: eth0
       rightnet:
-        ipv4_address: 193.167.100.2
-        ipv6_address: fd00:cafe:cafe:100::2
+        ipv4_address: ${SERVER_V4_NET}.2
+        ipv6_address: ${SERVER_V6_NET}::2
         interface_name: eth1
     extra_hosts:
-      - "server:193.167.100.100"
+      - "server:${SERVER_V4_ADDR}"
 
   server:
     image: $SERVER
-    container_name: server
     hostname: server
     stdin_open: true
     tty: true
@@ -41,6 +53,11 @@ services:
       - SSLKEYLOGFILE=/logs/keys.log
       - QLOGDIR=/logs/qlog/
       - TESTCASE=$TESTCASE_SERVER
+      - SUBNET_V4_PREFIX=${SUBNET_V4_PREFIX}
+      - SUBNET_V4_SUBNET=${SUBNET_V4_SUBNET}
+      - SUBNET_V4=${SUBNET_V4}
+      - SUBNET_V6_PREFIX=${SUBNET_V6_PREFIX}
+      - SUBNET_V6=${SUBNET_V6}
     depends_on:
       - sim
     cap_add:
@@ -49,16 +66,15 @@ services:
       memlock: 67108864
     networks:
       rightnet:
-        ipv4_address: 193.167.100.100
-        ipv6_address: fd00:cafe:cafe:100::100
+        ipv4_address: ${SERVER_V4_ADDR}
+        ipv6_address: ${SERVER_V6_ADDR}
         interface_name: eth0
     extra_hosts:
-      - "server4:193.167.100.100"
-      - "server6:fd00:cafe:cafe:100::100"
+      - "server4:${SERVER_V4_ADDR}"
+      - "server6:${SERVER_V6_ADDR}"
 
   client:
     image: $CLIENT
-    container_name: client
     hostname: client
     stdin_open: true
     tty: true
@@ -73,6 +89,11 @@ services:
       - QLOGDIR=/logs/qlog/
       - TESTCASE=$TESTCASE_CLIENT
       - REQUESTS=$REQUESTS
+      - SUBNET_V4_PREFIX=${SUBNET_V4_PREFIX}
+      - SUBNET_V4_SUBNET=${SUBNET_V4_SUBNET}
+      - SUBNET_V4=${SUBNET_V4}
+      - SUBNET_V6_PREFIX=${SUBNET_V6_PREFIX}
+      - SUBNET_V6=${SUBNET_V6}
     depends_on:
       - sim
     cap_add:
@@ -81,18 +102,17 @@ services:
       memlock: 67108864
     networks:
       leftnet:
-        ipv4_address: 193.167.0.100
-        ipv6_address: fd00:cafe:cafe:0::100
+        ipv4_address: ${CLIENT_V4_ADDR}
+        ipv6_address: ${CLIENT_V6_ADDR}
         interface_name: eth0
     extra_hosts:
-      - "server4:193.167.100.100"
-      - "server6:fd00:cafe:cafe:100::100"
-      - "server46:193.167.100.100"
-      - "server46:fd00:cafe:cafe:100::100"
+      - "server4:${SERVER_V4_ADDR}"
+      - "server6:${SERVER_V6_ADDR}"
+      - "server46:${SERVER_V4_ADDR}"
+      - "server46:${SERVER_V6_ADDR}"
 
   iperf_server:
     image: martenseemann/quic-interop-iperf-endpoint
-    container_name: iperf_server
     stdin_open: true
     tty: true
     environment:
@@ -105,17 +125,16 @@ services:
       - NET_ADMIN
     networks:
       rightnet:
-        ipv4_address: 193.167.100.110
-        ipv6_address: fd00:cafe:cafe:100::110
+        ipv4_address: ${SERVER_V4_NET}.110
+        ipv6_address: ${SERVER_V6_NET}::110
     extra_hosts:
-      - "client4:193.167.0.90"
-      - "client6:fd00:cafe:cafe:0::100"
-      - "client46:193.167.0.90"
-      - "client46:fd00:cafe:cafe:0::100"
+      - "client4:${CLIENT_V4_NET}.90"
+      - "client6:${CLIENT_V6_NET}::100"
+      - "client46:${CLIENT_V4_NET}.90"
+      - "client46:${CLIENT_V6_NET}::100"
 
   iperf_client:
     image: martenseemann/quic-interop-iperf-endpoint
-    container_name: iperf_client
     stdin_open: true
     tty: true
     environment:
@@ -127,13 +146,13 @@ services:
       - NET_ADMIN
     networks:
       leftnet:
-        ipv4_address: 193.167.0.90
-        ipv6_address: fd00:cafe:cafe:0::90
+        ipv4_address: ${CLIENT_V4_NET}.90
+        ipv6_address: ${CLIENT_V6_NET}::90
     extra_hosts:
-      - "server4:193.167.100.110"
-      - "server6:fd00:cafe:cafe:100::110"
-      - "server46:193.167.100.110"
-      - "server46:fd00:cafe:cafe:100::110"
+      - "server4:${SERVER_V4_NET}.110"
+      - "server6:${SERVER_V6_NET}::110"
+      - "server46:${SERVER_V4_NET}.110"
+      - "server46:${SERVER_V6_NET}::110"
 
 networks:
   leftnet:
@@ -143,15 +162,14 @@ networks:
     enable_ipv6: true
     ipam:
       config:
-        - subnet: 193.167.0.0/24
-        - subnet: fd00:cafe:cafe:0::/64
+        - subnet: ${CLIENT_V4_NET}.0/${V4_PREFIX}
+        - subnet: ${CLIENT_V6_NET}::/${V6_PREFIX}
   rightnet:
     driver: bridge
     driver_opts:
       com.docker.network.bridge.enable_ip_masquerade: 'false'
     enable_ipv6: true
     ipam:
       config:
-        - subnet: 193.167.100.0/24
-        - subnet: fd00:cafe:cafe:100::/64
-
+        - subnet: ${SERVER_V4_NET}.0/${V4_PREFIX}
+        - subnet: ${SERVER_V6_NET}::/${V6_PREFIX}