The overlay network driver creates a distributed network among multiple Docker daemon hosts.
sudo docker network ls
NETWORK ID NAME DRIVER SCOPE
bd060584d617 bridge bridge local
550b260adc35 host host local
2440bbbbab37 none null local
sudo docker network create overlay-A --driver overlay
vgvneeja0bp73r4nxsncs8knh
sudo docker network create overlay-B --driver overlay
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sudo docker network ls | grep overlay-
vgvneeja0bp7 overlay-A overlay swarm
pbsldt50bl4l overlay-B overlay swarm
#create a service using both network
sudo docker service create --mode global --name test-overlay --network overlay-A --network overlay-B nginx:alpine
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overall progress: 3 out of 3 tasks
64z9yjpcsg3w: running [==================================================>]
kj7q08sfk4oj: running [==================================================>]
o4adqybqntez: running [==================================================>]
verify: Service converged
sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
qpnrsmhl2p9e test-overlay global 3/3 nginx:alpine
sudo docker service ps test-overlay
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
zbj1w6taqv3n test-overlay.o4adqybqntezkuluy709304os nginx:alpine ip-172-31-15-10 Running Running about a minute ago
ylfbqxavtxyp test-overlay.kj7q08sfk4ojxq9cq9ezejk78 nginx:alpine ip-172-31-0-113 Running Running about a minute ago
u9lapxy4i3fn test-overlay.64z9yjpcsg3wu0yivbxfjkasd nginx:alpine ip-172-31-8-58 Running Running about a minute ago
sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cfce8705c96e nginx:alpine "/docker-entrypoint.…" About a minute ago Up About a minute 80/tcp test-overlay.o4adqybqntezkuluy709304os.zbj1w6taqv3nbbigfs5k6bebh
#list the interfaces
sudo docker exec test-overlay.o4adqybqntezkuluy709304os.zbj1w6taqv3nbbigfs5k6bebh ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: tunl0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN qlen 1000
link/ipip 0.0.0.0 brd 0.0.0.0
29: eth1@if30: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1450 qdisc noqueue state UP
link/ether 02:42:0a:00:02:05 brd ff:ff:ff:ff:ff:ff
31: eth2@if32: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
link/ether 02:42:ac:13:00:03 brd ff:ff:ff:ff:ff:ff
33: eth0@if34: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1450 qdisc noqueue state UP
link/ether 02:42:0a:00:01:05 brd ff:ff:ff:ff:ff:ff
sudo docker exec test-overlay.o4adqybqntezkuluy709304os.zbj1w6taqv3nbbigfs5k6bebh ifconfig
eth0 Link encap:Ethernet HWaddr 02:42:0A:00:01:05
inet addr:10.0.1.5 Bcast:10.0.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth1 Link encap:Ethernet HWaddr 02:42:0A:00:02:05
inet addr:10.0.2.5 Bcast:10.0.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth2 Link encap:Ethernet HWaddr 02:42:AC:13:00:03
inet addr:172.19.0.3 Bcast:172.19.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:27 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3212 (3.1 KiB) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
sudo docker exec test-overlay.o4adqybqntezkuluy709304os.zbj1w6taqv3nbbigfs5k6bebh ip route
default via 172.19.0.1 dev eth2
10.0.1.0/24 dev eth0 scope link src 10.0.1.5
10.0.2.0/24 dev eth1 scope link src 10.0.2.5
172.19.0.0/16 dev eth2 scope link src 172.19.0.3
sudo docker inspect test-overlay.o4adqybqntezkuluy709304os.zbj1w6taqv3nbbigfs5k6bebh | grep overlay- -A2
"overlay-A": {
"IPAMConfig": {
"IPv4Address": "10.0.1.5"
--
"overlay-B": {
"IPAMConfig": {
"IPv4Address": "10.0.2.5"
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