swarmmode-test.txt

2 Raspberry one PI 2 B+ and  one PI 3 running Raspbian

Version

pi@pi2:~ $ docker version
Client:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 05:31:15 2016
 OS/Arch:      linux/arm

Server:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 05:31:15 2016
 OS/Arch:      linux/arm


——

pi@pi3:~ $ docker version
Client:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 05:31:15 2016
 OS/Arch:      linux/arm

Server:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 05:31:15 2016
 OS/Arch:      linux/arm

Swarm creation

# init on pi2
pi@pi2:~ $ docker swarm init —listen-addr=192.168.1.30
Swarm initialized: current node (dypil1ss5y7bfiogoclqljrrk) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join \
    --token SWMTKN-1-27dpgcqo17jx3wrpqnc8dsmw6mrmyxz7ajwukugu5z9g09tj6o-d5ncsiqxjo3fjd6lry1mezi0o \
    192.168.1.30:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

# Join pi3 as worker
pi@pi3:~ $ docker swarm join --token SWMTKN-1-27dpgcqo17jx3wrpqnc8dsmw6mrmyxz7ajwukugu5z9g09tj6o-d5ncsiqxjo3fjd6lry1mezi0o --listen-addr=192.168.1.27:2377 192.168.1.30:2377
This node joined a swarm as a worker.

# List nodes from pi2
pi@pi2:~ $ docker node ls
ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
951fn3olxkdmvuq3fcrjerfoe    pi3       Ready   Active
dypil1ss5y7bfiogoclqljrrk *  pi2       Ready   Active        Leader

Scenario 1

# Create service
pi@pi2:~ $ docker service create --name ping1 --replicas=2 alexellis2/pingcurl:armv6 ping docker.com
0u6xw2tbihd6v8zzoselo6evo

# List tasks
pi@pi2:~ $ docker service ps ping1
ID                         NAME     IMAGE                      NODE  DESIRED STATE  CURRENT STATE           ERROR
f1qaaz351wh0jadzhp0vai1yb  ping1.1  alexellis2/pingcurl:armv6  pi2   Running        Running 21 seconds ago
3kltatqetk8vslkdlya6ej2b1  ping1.2  alexellis2/pingcurl:armv6  pi3   Running        Running 20 seconds ago

# => one task running on pi2, one running on pi3

# task running on p2
pi@pi2:~ $ docker ps
CONTAINER ID        IMAGE                       COMMAND                  CREATED             STATUS              PORTS               NAMES
2e78a0d48a55        alexellis2/pingcurl:armv6   "/usr/bin/entry.sh pi"   43 seconds ago      Up 39 seconds                           ping1.1.f1qaaz351wh0jadzhp0vai1yb

pi@pi2:~ $docker logs 2e78a0d48a55
pi@pi2:~ $

# task running on p3
pi@pi3:~ $ docker ps
CONTAINER ID        IMAGE                       COMMAND                  CREATED              STATUS              PORTS               NAMES
5beb9423b357        alexellis2/pingcurl:armv6   "/usr/bin/entry.sh pi"   About a minute ago   Up About a minute                       ping1.2.3kltatqetk8vslkdlya6ej2b1
pi@pi3:~ $ docker logs 5beb9423b357
pi@pi3:~ $

Scenario 2

# Run service from pi2 (manager node)
pi@pi2:~ $ docker service create --name hello1 --publish 3000:3000 --replicas=2 alexellis2/arm-alpinehello
8z5h5qf5n1j32mcx92sla1xjm

# Check services are running
pi@pi2:~ $ docker service ls
ID            NAME    REPLICAS  IMAGE                       COMMAND
8z5h5qf5n1j3  hello1  2/2       alexellis2/arm-alpinehello

# Where are they running ?
pi@pi2:~ $ docker service ps hello1
ID                         NAME      IMAGE                       NODE  DESIRED STATE  CURRENT STATE               ERROR
5il0spuiy2hunuxjzvhaoj0y1  hello1.1  alexellis2/arm-alpinehello  pi2   Running        Running 40 seconds ago
26wfce180j0s00k29fal3e4be  hello1.2  alexellis2/arm-alpinehello  pi3   Running        Running about a minute ago

# Curl localhost on pi2
pi@pi2:~ $ curl -4 localhost:3000
Hello

# Curl localhost on pi3
pi@pi3:~ $ curl -4 localhost:3000
Hello

Scenario 3

# Create network
pi@pi2:~ $ docker network create --driver overlay armnet
a6062go6yn41j3u8m2tqjn84u

# Create services
pi@pi2:~ $ docker service create --replicas=1 --network=armnet --name redis alexellis2/redis-arm:v6
1bjarom5tti9de39cuffoe3wg
pi@pi2:~ $ docker service create --name counter --replicas=2 --network=armnet --publish 3000:3000 alexellis2/arm_redis_counter
278inkcchuh7otc2mcfknri1i

# Check services are running
pi@pi2:~ $ docker service ls
ID            NAME     REPLICAS  IMAGE                         COMMAND
1bjarom5tti9  redis    1/1       alexellis2/redis-arm:v6
aep1mxoqbb4o  counter  1/2       alexellis2/arm_redis_counter

# Counter does not run on both nodes
pi@pi2:~ $ docker service ps counter
ID                         NAME           IMAGE                         NODE  DESIRED STATE  CURRENT STATE             ERROR
8ewp7umdor4rlqu6rihi6aqjj  counter.1      alexellis2/arm_redis_counter  pi2   Running        Preparing 28 seconds ago
9324wg74eekks6xh6p8ityw4f  counter.2      alexellis2/arm_redis_counter  pi3   Running        Running 12 seconds ago
2wo33qajsqh5ur4j6vgos0ppf   \_ counter.2  alexellis2/arm_redis_counter  pi2   Shutdown       Rejected 27 seconds ago   "failed to allocate gateway (1…"