Ruan Bekker's Blog

From a Curious mind to Posts on Github

Managing Traefik Configuration With Consul on Docker Swarm

Today we will Setup Consul with Traefik on Docker Swarm

Resources:

Create Consul in the Swarm:

Investigate using Consul with Traefik in Docker Swarm.

I have configured consul with constraints to be placed only on my one manager, as I was bind mounting the data directory to /mnt, as this was for testing on a small docker swarm cluster, but with Docker for AWS, we will use cloudstor with EFS, or GlusterFS, NFS for data persistency across any nodes.

Create Compose Files:

  • consul.yml
  • traefik.yml
  • apps.yml

consul.yml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
$ cat > consul.yml << EOF
version: '3.3'

services:
  consul:
    image: progrium/consul
    command: -server -bootstrap -log-level debug -ui-dir /ui
    networks:
      - appnet
    deploy:
      placement:
        constraints: [node.role == manager]
    volumes:
      - type: bind
        source: /mnt/consul
        target: /data
    ports:
      - "8400:8400"
      - "8500:8500"
      - "8600:53/udp"

networks:
  appnet:
    external: true

EOF

traefik.yml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
$ cat > traefik.yml << EOF
version: '3.3'

services:
  traefik:
    image: traefik
    networks:
      - appnet
    command: --consul --consul.endpoint=consul:8500
    ports:
      - "80:80"
      - "8080:8080"

networks:
  appnet:
    external: true

EOF

apps.yml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
$ cat > apps.yml << EOF
version: '3.3'

services:
  whoami1:
    image: emilevauge/whoami
    networks:
      - appnet

  whoami2:
    image: emilevauge/whoami
    networks:
      - appnet

  whoami3:
    image: emilevauge/whoami
    networks:
      - appnet

  whoami4:
    image: emilevauge/whoami
    networks:
      - appnet

  whoami5:
    image: rbekker87/flask-containername
    networks:
      - appnet

  whoami6:
    image: rbekker87/flask-containername
    networks:
      - appnet

networks:
  appnet:
    external: true

EOF

Create Overlay Network and Deploy Stacks

Create the overlay network, and deploy the 3 stacks:

1
2
3
4
$ docker network create --driver=overlay appnet
$ docker stack deploy --compose-file consul.yml kvstore
$ docker stack deploy --compose-file traefik.yml proxy
$ docker stack deploy --compose-file apps.yml apps

Populate Configs and Push to Consul KV Store:

Config for Traefik:

1
2
3
4
5
6
7
8
9
$ cat > create_traefik_config.sh << EOF
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/loglevel -d 'DEBUG'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/defaultentrypoints/0 -d 'http'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/entrypoints/http/address -d ':80'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/consul/endpoint -d 'consul:8500'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/consul/watch -d 'true'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/consul/prefix -d 'traefik'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/web/address -d ':8081'
EOF

Config for WhoAmI Web Apps:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
$ cat > create_whoami_config.sh << EOF
# backend-1
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend1/circuitbreaker/expression -d 'NetworkErrorRatio() > 0.5'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend1/servers/server1/url -d 'http://whoami1:80'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend1/servers/server1/weight -d '10'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend1/servers/server2/url -d 'http://whoami2:80'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend1/servers/server2/weight -d '1'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend1/servers/server2/tags -d 'api,helloworld'

# backend-2
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/maxconn/amount -d '10'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/maxconn/extractorfunc -d 'request.host'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/loadbalancer/method -d 'drr'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/servers/server1/url -d 'http://whoami3:80'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/servers/server1/weight -d '1'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/servers/server2/url -d 'http://whoami4:80'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/servers/server2/weight -d '2'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend2/servers/server2/tags -d 'web'

# frontend-1
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend1/backend -d 'backend2'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend1/routes/test_1/rule -d 'Host:test.localhost'

# frontend-2
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend2/backend -d 'backend1'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend2/passHostHeader -d 'true'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend2/priority -d '10'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend2/entrypoints -d 'http'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend2/routes/test_2/rule -d 'PathPrefix:/test'
EOF

Config for Flask Container Name Web Apps:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
$ cat > create_flask_config.sh << EOF
# backends
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/amount -d '5'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/maxconn/extractorfunc -d 'request.host'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/loadbalancer/method -d 'drr'

curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server1/url -d 'http://whoami5:5000'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server1/weight -d '1'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server1/tags -d 'flask'

curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server2/url -d 'http://whoami6:5000'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server2/weight -d '2'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server2/tags -d 'flask'

# frontend:
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend3/backend -d 'backend3'
curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend3/routes/test_1/rule -d 'Host:flask.localhost'
EOF

Push Configs to Consul:

1
2
3
$ sh create_traefik_config.sh
$ sh create_whoami_config.sh
$ sh create_flask_config.sh

Testing Applications:

Test Frontend with Host Header: test.localhost

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
$ curl -H "Host:test.localhost" http://127.0.0.1:80
Hostname: 88c29de3aeb0
IP: 127.0.0.1
IP: 10.0.0.6
IP: 10.0.0.7
IP: 172.18.0.3
GET / HTTP/1.1
Host: test.localhost
User-Agent: curl/7.47.0
Accept: */*
Accept-Encoding: gzip
X-Forwarded-For: 10.255.0.2
X-Forwarded-Host: test.localhost
X-Forwarded-Proto: http
X-Forwarded-Server: 2f827d04fbfb

Test Frontend with PathPrefix: /test

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
$ curl http://127.0.0.1:80/test
Hostname: 14bd4dc0ab00
IP: 127.0.0.1
IP: 10.0.0.12
IP: 10.0.0.13
IP: 172.18.0.4
GET /test HTTP/1.1
Host: 127.0.0.1
User-Agent: curl/7.47.0
Accept: */*
Accept-Encoding: gzip
X-Forwarded-For: 10.255.0.2
X-Forwarded-Host: 127.0.0.1
X-Forwarded-Proto: http
X-Forwarded-Server: 2f827d04fbfb

Test with failure expected:

1
2
3
4
5
$ curl http://127.0.0.1:80
404 page not found

$ curl -H "Host:foo.localhost" http://127.0.0.1:80
404 page not found

Change the frontend rule to foo.localhost and test again:

1
$ curl -XPUT http://127.0.0.1:8500/v1/kv/traefik/frontends/frontend1/routes/test_1/rule -d 'Host:foo.localhost'

Testing with foo.localhost :

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
$ curl -H "Host:foo.localhost" http://127.0.0.1:80
Hostname: 88c29de3aeb0
IP: 127.0.0.1
IP: 10.0.0.6
IP: 10.0.0.7
IP: 172.18.0.3
GET / HTTP/1.1
Host: test.localhost
User-Agent: curl/7.47.0
Accept: */*
Accept-Encoding: gzip
X-Forwarded-For: 10.255.0.2
X-Forwarded-Host: foo.localhost
X-Forwarded-Proto: http
X-Forwarded-Server: 2f827d04fbfb

Test Flask Web Apps, with RoundRobin + Weight:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: c94e41420ec7 , UUID: 8d536277-1041-4140-b28a-91630d69ab15

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: 786a3b15a32e , UUID: 50bb435f-dac3-4cb0-8ecf-250f13a4d7a5

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: c94e41420ec7 , UUID: 680ca88c-8048-4044-a31b-1e922545dc8c

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: c94e41420ec7 , UUID: 5506792c-04e5-4517-b58e-fad57b5d1da5

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: 786a3b15a32e , UUID: 930056e5-4667-4c2c-976b-246cf891a351

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: c94e41420ec7 , UUID: 7c757b50-0e3a-47e2-8636-ae0583802afb

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: c94e41420ec7 , UUID: 918bf337-1476-480c-aacb-72fc89392c45

$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: 786a3b15a32e , UUID: 5c2c6a0e-f2ea-4d5f-a6ce-a7df2ef4886b

Data Persistent Test:

List the Stacks:

1
2
3
4
5
$ docker stack ls
NAME                SERVICES
apps                6
kvstore             1
proxy               1

Kill the Consul Container to ensure data is persistent:

1
$ docker kill $(docker ps -f name=consul -q)

Verify that the replica has been fulfilled to its desired state:

1
2
3
4
5
$ docker stack ps kvstore
ID                  NAME                   IMAGE                    NODE                DESIRED STATE       CURRENT STATE                ERROR                         PORTS
j80kxxei6lyx        kvstore_consul.1       progrium/consul:latest   ip-10-1-4-51        Running             Running about a minute ago
lsvww0z8g24c         \_ kvstore_consul.1   progrium/consul:latest   ip-10-1-4-51        Shutdown            Failed about a minute ago    "task: non-zero exit (137)"
amkmsfodslwk         \_ kvstore_consul.1   progrium/consul:latest   ip-10-1-4-51        Shutdown            Shutdown 33 minutes ago

Read the Value of the Backend3 URL Key:

1
2
$ curl -XGET http://127.0.0.1:8500/v1/kv/traefik/backends/backend3/servers/server1/url?raw
http://whoami5:5000

`

Test The Service:

1
2
$ curl -H "Host:flask.localhost" http://127.0.0.1:80
Container Hostname: 786a3b15a32e , UUID: 4cf985e0-3f47-4320-ac38-42745b00ba1e

Inspect Services:

Consul:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
$ docker service inspect kvstore_consul
[
    {
        "ID": "ppe2c1ld5eyvby6x62fr649z8",
        "Version": {
            "Index": 2097
        },
        "CreatedAt": "2017-10-03T12:40:27.342669337Z",
        "UpdatedAt": "2017-10-03T12:55:22.93080059Z",
        "Spec": {
            "Name": "kvstore_consul",
            "Labels": {
                "com.docker.stack.image": "progrium/consul",
                "com.docker.stack.namespace": "kvstore"
            },
            "TaskTemplate": {
                "ContainerSpec": {
                    "Image": "progrium/consul:latest@sha256:8cc8023462905929df9a79ff67ee435a36848ce7a10f18d6d0faba9306b97274",
                    "Labels": {
                        "com.docker.stack.namespace": "kvstore"
                    },
                    "Args": [
                        "-server",
                        "-bootstrap",
                        "-log-level",
                        "debug",
                        "-ui-dir",
                        "/ui"
                    ],
                    "Privileges": {
                        "CredentialSpec": null,
                        "SELinuxContext": null
                    },
                    "Mounts": [
                        {
                            "Type": "bind",
                            "Source": "/mnt/consul",
                            "Target": "/data"
                        }
                    ],
                    "StopGracePeriod": 10000000000,
                    "DNSConfig": {}
                },
                "Resources": {},
                "RestartPolicy": {
                    "Condition": "any",
                    "Delay": 5000000000,
                    "MaxAttempts": 0
                },
                "Placement": {
                    "Constraints": [
                        "node.role == manager"
                    ],
                    "Platforms": [
                        {
                            "Architecture": "amd64",
                            "OS": "linux"
                        }
                    ]
                },
                "Networks": [
                    {
                        "Target": "5q3puzw9pfxa5gokx2mx1kn9j",
                        "Aliases": [
                            "consul"
                        ]
                    }
                ],
                "ForceUpdate": 0,
                "Runtime": "container"
            },
            "Mode": {
                "Replicated": {
                    "Replicas": 1
                }
            },
            "UpdateConfig": {
                "Parallelism": 1,
                "FailureAction": "pause",
                "Monitor": 5000000000,
                "MaxFailureRatio": 0,
                "Order": "stop-first"
            },
            "RollbackConfig": {
                "Parallelism": 1,
                "FailureAction": "pause",
                "Monitor": 5000000000,
                "MaxFailureRatio": 0,
                "Order": "stop-first"
            },
            "EndpointSpec": {
                "Mode": "vip",
                "Ports": [
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8400,
                        "PublishedPort": 8400,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8500,
                        "PublishedPort": 8500,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "udp",
                        "TargetPort": 53,
                        "PublishedPort": 8600,
                        "PublishMode": "ingress"
                    }
                ]
            }
        },
        "PreviousSpec": {
            "Name": "kvstore_consul",
            "Labels": {
                "com.docker.stack.image": "progrium/consul",
                "com.docker.stack.namespace": "kvstore"
            },
            "TaskTemplate": {
                "ContainerSpec": {
                    "Image": "progrium/consul:latest@sha256:8cc8023462905929df9a79ff67ee435a36848ce7a10f18d6d0faba9306b97274",
                    "Labels": {
                        "com.docker.stack.namespace": "kvstore"
                    },
                    "Args": [
                        "-server",
                        "-bootstrap",
                        "-log-level",
                        "debug",
                        "-ui-dir",
                        "/ui"
                    ],
                    "Privileges": {
                        "CredentialSpec": null,
                        "SELinuxContext": null
                    },
                    "Mounts": [
                        {
                            "Type": "bind",
                            "Source": "/mnt/consul",
                            "Target": "/data"
                        }
                    ]
                },
                "Resources": {},
                "Placement": {
                    "Platforms": [
                        {
                            "Architecture": "amd64",
                            "OS": "linux"
                        }
                    ]
                },
                "Networks": [
                    {
                        "Target": "5q3puzw9pfxa5gokx2mx1kn9j",
                        "Aliases": [
                            "consul"
                        ]
                    }
                ],
                "ForceUpdate": 0,
                "Runtime": "container"
            },
            "Mode": {
                "Replicated": {
                    "Replicas": 1
                }
            },
            "EndpointSpec": {
                "Mode": "vip",
                "Ports": [
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8400,
                        "PublishedPort": 8400,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8500,
                        "PublishedPort": 8500,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "udp",
                        "TargetPort": 53,
                        "PublishedPort": 8600,
                        "PublishMode": "ingress"
                    }
                ]
            }
        },
        "Endpoint": {
            "Spec": {
                "Mode": "vip",
                "Ports": [
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8400,
                        "PublishedPort": 8400,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8500,
                        "PublishedPort": 8500,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "udp",
                        "TargetPort": 53,
                        "PublishedPort": 8600,
                        "PublishMode": "ingress"
                    }
                ]
            },
            "Ports": [
                {
                    "Protocol": "tcp",
                    "TargetPort": 8400,
                    "PublishedPort": 8400,
                    "PublishMode": "ingress"
                },
                {
                    "Protocol": "tcp",
                    "TargetPort": 8500,
                    "PublishedPort": 8500,
                    "PublishMode": "ingress"
                },
                {
                    "Protocol": "udp",
                    "TargetPort": 53,
                    "PublishedPort": 8600,
                    "PublishMode": "ingress"
                }
            ],
            "VirtualIPs": [
                {
                    "NetworkID": "zz458844j2msbqa6a1g2es8re",
                    "Addr": "10.255.0.5/16"
                },
                {
                    "NetworkID": "5q3puzw9pfxa5gokx2mx1kn9j",
                    "Addr": "10.0.0.2/24"
                }
            ]
        },
        "UpdateStatus": {
            "State": "completed",
            "StartedAt": "2017-10-03T12:55:09.724524449Z",
            "CompletedAt": "2017-10-03T12:55:22.930760766Z",
            "Message": "update completed"
        }
    }
]

Traefik:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
$ docker service inspect proxy_traefik
[
    {
        "ID": "oqb0lyiprpwby9xkb4n1mn5kl",
        "Version": {
            "Index": 2037
        },
        "CreatedAt": "2017-10-03T12:40:37.696749025Z",
        "UpdatedAt": "2017-10-03T12:40:37.698038856Z",
        "Spec": {
            "Name": "proxy_traefik",
            "Labels": {
                "com.docker.stack.image": "traefik",
                "com.docker.stack.namespace": "proxy"
            },
            "TaskTemplate": {
                "ContainerSpec": {
                    "Image": "traefik:latest@sha256:90697fb79a104520f350a3a1db6402584f473301ab6d1a71d264758b65fa232e",
                    "Labels": {
                        "com.docker.stack.namespace": "proxy"
                    },
                    "Args": [
                        "--consul",
                        "--consul.endpoint=consul:8500"
                    ],
                    "Privileges": {
                        "CredentialSpec": null,
                        "SELinuxContext": null
                    },
                    "StopGracePeriod": 10000000000,
                    "DNSConfig": {}
                },
                "Resources": {},
                "RestartPolicy": {
                    "Condition": "any",
                    "Delay": 5000000000,
                    "MaxAttempts": 0
                },
                "Placement": {
                    "Platforms": [
                        {
                            "Architecture": "amd64",
                            "OS": "linux"
                        },
                        {
                            "OS": "linux"
                        },
                        {
                            "Architecture": "arm64",
                            "OS": "linux"
                        }
                    ]
                },
                "Networks": [
                    {
                        "Target": "5q3puzw9pfxa5gokx2mx1kn9j",
                        "Aliases": [
                            "traefik"
                        ]
                    }
                ],
                "ForceUpdate": 0,
                "Runtime": "container"
            },
            "Mode": {
                "Replicated": {
                    "Replicas": 1
                }
            },
            "UpdateConfig": {
                "Parallelism": 1,
                "FailureAction": "pause",
                "Monitor": 5000000000,
                "MaxFailureRatio": 0,
                "Order": "stop-first"
            },
            "RollbackConfig": {
                "Parallelism": 1,
                "FailureAction": "pause",
                "Monitor": 5000000000,
                "MaxFailureRatio": 0,
                "Order": "stop-first"
            },
            "EndpointSpec": {
                "Mode": "vip",
                "Ports": [
                    {
                        "Protocol": "tcp",
                        "TargetPort": 80,
                        "PublishedPort": 80,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8080,
                        "PublishedPort": 8080,
                        "PublishMode": "ingress"
                    }
                ]
            }
        },
        "Endpoint": {
            "Spec": {
                "Mode": "vip",
                "Ports": [
                    {
                        "Protocol": "tcp",
                        "TargetPort": 80,
                        "PublishedPort": 80,
                        "PublishMode": "ingress"
                    },
                    {
                        "Protocol": "tcp",
                        "TargetPort": 8080,
                        "PublishedPort": 8080,
                        "PublishMode": "ingress"
                    }
                ]
            },
            "Ports": [
                {
                    "Protocol": "tcp",
                    "TargetPort": 80,
                    "PublishedPort": 80,
                    "PublishMode": "ingress"
                },
                {
                    "Protocol": "tcp",
                    "TargetPort": 8080,
                    "PublishedPort": 8080,
                    "PublishMode": "ingress"
                }
            ],
            "VirtualIPs": [
                {
                    "NetworkID": "zz458844j2msbqa6a1g2es8re",
                    "Addr": "10.255.0.7/16"
                },
                {
                    "NetworkID": "5q3puzw9pfxa5gokx2mx1kn9j",
                    "Addr": "10.0.0.4/24"
                }
            ]
        }
    }
]

Flask App:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
$ docker service inspect apps_whoami5
[
    {
        "ID": "hy0443u03j8pygaegdorsrjot",
        "Version": {
            "Index": 2052
        },
        "CreatedAt": "2017-10-03T12:41:06.582341297Z",
        "UpdatedAt": "2017-10-03T12:41:06.583398389Z",
        "Spec": {
            "Name": "apps_whoami5",
            "Labels": {
                "com.docker.stack.image": "rbekker87/flask-containername",
                "com.docker.stack.namespace": "apps"
            },
            "TaskTemplate": {
                "ContainerSpec": {
                    "Image": "rbekker87/flask-containername:latest@sha256:fa4dc5905a10130d4309ffbc877155b9f61956980dc51ee2eaa16ac4255bcc2b",
                    "Labels": {
                        "com.docker.stack.namespace": "apps"
                    },
                    "Privileges": {
                        "CredentialSpec": null,
                        "SELinuxContext": null
                    },
                    "StopGracePeriod": 10000000000,
                    "DNSConfig": {}
                },
                "Resources": {},
                "RestartPolicy": {
                    "Condition": "any",
                    "Delay": 5000000000,
                    "MaxAttempts": 0
                },
                "Placement": {
                    "Platforms": [
                        {
                            "Architecture": "amd64",
                            "OS": "linux"
                        }
                    ]
                },
                "Networks": [
                    {
                        "Target": "5q3puzw9pfxa5gokx2mx1kn9j",
                        "Aliases": [
                            "whoami5"
                        ]
                    }
                ],
                "ForceUpdate": 0,
                "Runtime": "container"
            },
            "Mode": {
                "Replicated": {
                    "Replicas": 1
                }
            },
            "UpdateConfig": {
                "Parallelism": 1,
                "FailureAction": "pause",
                "Monitor": 5000000000,
                "MaxFailureRatio": 0,
                "Order": "stop-first"
            },
            "RollbackConfig": {
                "Parallelism": 1,
                "FailureAction": "pause",
                "Monitor": 5000000000,
                "MaxFailureRatio": 0,
                "Order": "stop-first"
            },
            "EndpointSpec": {
                "Mode": "vip"
            }
        },
        "Endpoint": {
            "Spec": {
                "Mode": "vip"
            },
            "VirtualIPs": [
                {
                    "NetworkID": "5q3puzw9pfxa5gokx2mx1kn9j",
                    "Addr": "10.0.0.8/24"
                }
            ]
        }
    }
}

Comments