Docker Containerized Application Frontend -> Browser

Software & Operating Systems Open Source & Web-Based
1

Hey there!

So I got my companies application running on docker (woohoo, SELinux was in the way, but now its running) but i have no idea how to make it accessable per browser.

As far as I understand it, in the .config file there is the variable to set the URL to, both front-end and back-end.

The browser doesnt find that site, so I guess its something with DNS or hosts or something but i have no idea / clue on what to even google for since I’ve never had my toes in the web apps.

What do you people would look at first to debug this?

Lots of Love y’all :heart:

-edit-

All the Containers are UP, no probs.

browser cant resolve the URL in the .config (hiddenlair.tech)

curl GET on the API endpoint:
curl: (6) Could not resolve host: hiddenlair.tech

docker network 
[
    {
        "Name": "booker_default",
        "Id": "87db6f008dea7f5ac74b03b0a650c3fd759d45f7427aa29ecd9fabd6831c6c70",
        "Created": "2019-01-26T14:10:12.877328188+01:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Containers": {
            "1e5c396a89694a50f5fd59d230fb6fa09420dbbbbfef42508db395ddbc9741ca": {
                "Name": "booker_dckr-backup_1",
                "EndpointID": "bcfd1bce24d5346cc209487f26dbce10cd7f86a1aebe5f2a8adf09794d120222",
                "MacAddress": "02:42:ac:12:00:0e",
                "IPv4Address": "172.18.0.14/16",
                "IPv6Address": ""
            },
            "441e6419ec4e8b37b98c6764ed17931dd78e99fa000efa1ed8f862b970b7b65f": {
                "Name": "booker_dckr-backend_1",
                "EndpointID": "2527beaebe912c49e821a46c89ed0e588d2a6f173536cdcd6c50882c5c8b624c",
                "MacAddress": "02:42:ac:12:00:0d",
                "IPv4Address": "172.18.0.13/16",
                "IPv6Address": ""
            },
            "608c8075fa3c76770ab6e65676b9132c7c4cd960f2d142517c12d80f8dfe3636": {
                "Name": "booker_dckr-mq_1",
                "EndpointID": "15cd069d26b63b6603ce04084c8b56158a383bb8f4360ca649fd97f0237e3625",
                "MacAddress": "02:42:ac:12:00:05",
                "IPv4Address": "172.18.0.5/16",
                "IPv6Address": ""
            },
            "6be56806786cfa02064f23a64d7ba2774a4c035291a1e043bb518317fdf02e2e": {
                "Name": "booker_dckr-tika_1",
                "EndpointID": "1cbe28eb4459da6c0ce26f966d1d6d361095a5980f9d4675428aac6fc176c866",
                "MacAddress": "02:42:ac:12:00:08",
                "IPv4Address": "172.18.0.8/16",
                "IPv6Address": ""
            },
            "6d2d4b4688b0797f8751363a5d77bd7fab4b0cd4d5d5e56942b620c4daa17f6b": {
                "Name": "booker_dckr-db_1",
                "EndpointID": "ae135ddafa48233a58a2516390d1ba347f58df50d65c15bcac3d659232b03205",
                "MacAddress": "02:42:ac:12:00:09",
                "IPv4Address": "172.18.0.9/16",
                "IPv6Address": ""
            },
            "735b1a65f61bf20879928e3ceefcb11340608af3247bbe1aa0d5ebfc309ea536": {
                "Name": "booker_dckr-docs_1",
                "EndpointID": "44e7367f1080c457419a1f020df717e275e0a212989d0b3b062a2d8e0839ed21",
                "MacAddress": "02:42:ac:12:00:0c",
                "IPv4Address": "172.18.0.12/16",
                "IPv6Address": ""
            },
            "82931d385a37dd7b5f75a50035f4146d2afd5d108e71d27f729c4ff17d89704d": {
                "Name": "booker_dckr-logstash_1",
                "EndpointID": "f64d4f641c528542778a66f2c750aa2533d9ea86360ea3327afb1be686050020",
                "MacAddress": "02:42:ac:12:00:03",
                "IPv4Address": "172.18.0.3/16",
                "IPv6Address": ""
            },
            "89b3b1cb97a5da7bfacd3a3eee8da275986c247009b03133eb666fe5dc2abb46": {
                "Name": "booker_dckr-frontend_1",
                "EndpointID": "f8edc44be9d050e43d7fb24955d1dbe683650b77ea37951012d3d232c86fbf4a",
                "MacAddress": "02:42:ac:12:00:06",
                "IPv4Address": "172.18.0.6/16",
                "IPv6Address": ""
            },
            "8d27ee5c75116c6100a856690014f57c77a8d029d778746137b12a37516e3f7c": {
                "Name": "booker_dckr-kibana_1",
                "EndpointID": "52dbed479be7a7061b70f4cdd1de31df0e4d6d98f19e1b4f3688ac4db8e8b1a1",
                "MacAddress": "02:42:ac:12:00:04",
                "IPv4Address": "172.18.0.4/16",
                "IPv6Address": ""
            },
            "bb18803ab04af84202a6d45f24ee3584b19101d0ae896d18b0f129100c56698d": {
                "Name": "booker_dckr-lb_1",
                "EndpointID": "706d4c75b61269281093f7ff8297c2374d922a3c38a578ffc9cc4ea08086fd45",
                "MacAddress": "02:42:ac:12:00:0f",
                "IPv4Address": "172.18.0.15/16",
                "IPv6Address": ""
            },
            "bd5994bb7a0b9c4f2858cb4cdb70155a6f4239f6ff9cb57d2a26add2f22e560c": {
                "Name": "booker_dckr-es-logs_1",
                "EndpointID": "9150944c9c14d274fe56d5eac05d40e7da658c1556a0edd6f6a91a2fa66d7429",
                "MacAddress": "02:42:ac:12:00:02",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            },
            "c53a049a46af72091675f171c632096badc315277276de6b926e6b1507fb1f4a": {
                "Name": "booker_dckr-redis_1",
                "EndpointID": "cd4def26cf1b71141baa89270b1b7344f55d9df37419dfc4deb4e13c8ae1652b",
                "MacAddress": "02:42:ac:12:00:0b",
                "IPv4Address": "172.18.0.11/16",
                "IPv6Address": ""
            },
            "d35d2cbafc561241825468e3242a700f7c38bfa9e7a4561b2d82fc12a815c308": {
                "Name": "booker_dckr-mongo_1",
                "EndpointID": "b1f2dcb926dc8561151bd86aca9b72ae304f90a56731f2d074cdbb51eba50620",
                "MacAddress": "02:42:ac:12:00:07",
                "IPv4Address": "172.18.0.7/16",
                "IPv6Address": ""
            },
            "e3e2f2cdecd40560606f3459639da011a577bfd3b0617453752f1a8de0fcba11": {
                "Name": "booker_dckr-es_1",
                "EndpointID": "c0a2aebeb5938417a940499fe3202aad61dedce4e649d9329879832ae8ee6775",
                "MacAddress": "02:42:ac:12:00:0a",
                "IPv4Address": "172.18.0.10/16",
                "IPv6Address": ""
            },
            "f3e9bd1f2b0b6642704e3c79f517ff7520418464f7a5f56c20ff76427aae051b": {
                "Name": "booker_dckr-logspout_1",
                "EndpointID": "5b859421e2767121f2ae318618a359a0f1b3cd17594e57981dc779eafe83eaf3",
                "MacAddress": "02:42:ac:12:00:10",
                "IPv4Address": "172.18.0.16/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]
1 Like
2

I have no experience with docker.

I guess this application is some kind of webserver? What I would do is try a simple ready made webserver docker image for testing and look at the config and see if it works or not. (reduce variables/moving parts)

3

For local testing you can just edit the hosts file of your client machine to point to the docker server.

Make sure when you run you container you pass a -p flag to map the port inside the container to a port on the host machine.

docker run -p 0.0.0.0:80:8080/tcp image-name

The above will cause port 8080 inside your container to be mapped to port 80 on all interfaces on the docker host.

Then in the host file of your web client, you can add the following:

1.2.3.4 hiddenlair.tech

where 1.2.3.4 is the IP address of the docker host machine.

Then when you go to hiddenlair.tech in your browser you should be directed to the application running in the docker container.

5 Likes