Nginx docker as nodejs proxy in local - node.js

Question

At the moment I am using nginx in docker to proxy my node applications
for example I add website.dev in my host file
and my actual nginx config is
worker_processes 4;
pid /run/nginx.pid;
events {}
http {
server {
listen 80;
server_name website.dev;
location / {
proxy_pass http://localnode:3000;
proxy_set_header X-Base-Path "/";
proxy_set_header Website-Name "test";
}
}
}
And I a starting my docker container with this command
docker run --name infra-nginx --add-host localnode:$(ifconfig | grep inet | grep -v inet6 | grep -v 127.0.0.1 | awk '{print $2}') -p 80:80 -d docker-registry.host.com:5000/infra-nginx:dev
Where
$(ifconfig | grep inet | grep -v inet6 | grep -v 127.0.0.1 | awk '{print $2}') is getting my local ip, not working all the time.
The problem is if I want to work without internet, I can't.
And when my ip change, I have to restart the container with the new ip.
I tried with this config instead
worker_processes 4;
pid /run/nginx.pid;
events {}
http {
server {
listen 80;
server_name localhost;
location / {
return 200 'gangnam style!';
}
}
server {
listen 80;
server_name website.dev;
location / {
proxy_pass http://localhost:3000;
proxy_set_header X-Base-Path "/";
proxy_set_header Website-Name "test";
}
}
}
And running
docker run --name infra-nginx --network host -d docker-registry.host.com:5000/infra-nginx:dev
In this case, when I am running:
curl http://website.dev/
I have
curl: (7) Failed to connect to website.dev port 80: Connection refused
The docker ps is giving
81da561dd131 ajouve/infra-nginx:dev "nginx -g 'daemon ..." 32 minutes ago Up 32 minutes infra-nginx
the netstat -plant is giving me
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1/nginx: master pro
tcp 0 0 172.17.0.1:35962 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35938 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35994 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:45080 172.17.0.5:6379 ESTABLISHED -
tcp 0 0 172.17.0.1:35990 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 192.168.65.2:44900 151.101.0.204:80 TIME_WAIT -
tcp 0 0 172.17.0.1:45126 172.17.0.5:6379 ESTABLISHED -
tcp 0 0 172.17.0.1:36000 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35958 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:59172 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:35976 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:59106 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:35980 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35996 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:58356 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35966 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:45112 172.17.0.5:6379 ESTABLISHED -
tcp 0 0 172.17.0.1:35932 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:58366 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35998 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 192.168.65.2:41386 206.251.255.63:80 TIME_WAIT -
tcp 0 0 172.17.0.1:58358 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35956 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35924 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:36004 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:58360 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35964 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35916 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:58362 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:59148 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:59166 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:35944 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35912 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35954 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:45116 172.17.0.5:6379 ESTABLISHED -
tcp 0 0 172.17.0.1:58354 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35988 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:59122 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 192.168.65.2:34936 5.153.231.4:80 TIME_WAIT -
tcp 0 0 192.168.65.2:44904 151.101.0.204:80 TIME_WAIT -
tcp 0 0 172.17.0.1:59162 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:59180 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:45130 172.17.0.5:6379 ESTABLISHED -
tcp 0 0 172.17.0.1:59140 172.17.0.3:5672 ESTABLISHED -
tcp 0 0 172.17.0.1:36002 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35922 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:35970 172.17.0.4:27017 ESTABLISHED -
tcp 0 0 172.17.0.1:58364 172.17.0.4:27017 ESTABLISHED -
tcp6 0 0 :::6379 :::* LISTEN -
tcp6 0 0 :::15672 :::* LISTEN -
tcp6 0 0 :::5672 :::* LISTEN -
tcp6 0 0 :::27017 :::* LISTEN -
From the docker container:
curl -v localhost
Is giving
* Rebuilt URL to: localhost/
* Hostname was NOT found in DNS cache
* Trying ::1...
* connect to ::1 port 80 failed: Connection refused
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.38.0
> Host: localhost
> Accept: */*
>
< HTTP/1.1 200 OK
* Server nginx/1.10.3 is not blacklisted
< Server: nginx/1.10.3
< Date: Fri, 29 Sep 2017 08:46:10 GMT
< Content-Type: text/plain
< Content-Length: 14
< Connection: keep-alive
<
* Connection #0 to host localhost left intact
gangnam style!
But curl -v website.dev is returning
* Rebuilt URL to: website.dev/
* Hostname was NOT found in DNS cache
* Trying 127.0.0.1...
* Connected to website.dev (127.0.0.1) port 80 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.38.0
> Host: website.dev
> Accept: */*
>
< HTTP/1.1 502 Bad Gateway
* Server nginx/1.10.3 is not blacklisted
< Server: nginx/1.10.3
< Date: Fri, 29 Sep 2017 08:46:37 GMT
< Content-Type: text/html
< Content-Length: 173
< Connection: keep-alive
<
<html>
<head><title>502 Bad Gateway</title></head>
<body bgcolor="white">
<center><h1>502 Bad Gateway</h1></center>
<hr><center>nginx/1.10.3</center>
</body>
</html>
* Connection #0 to host website.dev left intact
And docker inspect infra-nginx
[
{
"Id": "16941d22442a257f0874a772df935514c658ac16ec67eb3f65606b4d7c0ee62e",
"Created": "2017-09-29T08:31:21.144827953Z",
"Path": "nginx",
"Args": [
"-g",
"daemon off;"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 2656,
"ExitCode": 0,
"Error": "",
"StartedAt": "2017-09-29T08:31:21.548119911Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:25d085baee52923e32f8d134048238fb67e71173e01f758c391119235f7fc565",
"ResolvConfPath": "/var/lib/docker/containers/16941d22442a257f0874a772df935514c658ac16ec67eb3f65606b4d7c0ee62e/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/16941d22442a257f0874a772df935514c658ac16ec67eb3f65606b4d7c0ee62e/hostname",
"HostsPath": "/var/lib/docker/containers/16941d22442a257f0874a772df935514c658ac16ec67eb3f65606b4d7c0ee62e/hosts",
"LogPath": "/var/lib/docker/containers/16941d22442a257f0874a772df935514c658ac16ec67eb3f65606b4d7c0ee62e/16941d22442a257f0874a772df935514c658ac16ec67eb3f65606b4d7c0ee62e-json.log",
"Name": "/infra-nginx",
"RestartCount": 0,
"Driver": "aufs",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "host",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": null,
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DiskQuota": 0,
"KernelMemory": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": -1,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0
},
"GraphDriver": {
"Data": null,
"Name": "aufs"
},
"Mounts": [],
"Config": {
"Hostname": "moby",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"443/tcp": {},
"80/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NGINX_VERSION=1.10.3-1~jessie"
],
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"ArgsEscaped": true,
"Image": "ajouve/infra-nginx:dev",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "175272649c9a9c5abbfde7516328bdab5cb3825e1e027eee0580eb18f7ff77cb",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/default",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Networks": {
"host": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "3e04a4c12b5a5b3f55e7b4e918dadec64806b5c926fc249e8aa3e28398a02954",
"EndpointID": "7de54daaa31230c9492a463792015af727e9562eaacbaa0c2d70cdc3d3b04236",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": null
}
}
}
}
]

Answer 1

So when you run it using --net host it actually still is not on mac network as such. That is why it is not working.
From the documentation
The Mac has a changing IP address (or none if you have no network access). From 17.06 onwards our recommendation is to connect to the special Mac-only DNS name docker.for.mac.localhost which will resolve to the internal IP address used by the host.
So you need to change your config to
worker_processes 4;
pid /run/nginx.pid;
events {}
http {
server {
listen 80;
server_name localhost;
location / {
return 200 'gangnam style!';
}
}
server {
listen 80;
server_name website.dev;
location / {
proxy_pass http://docker.for.mac.localhost:3000;
proxy_set_header X-Base-Path "/";
proxy_set_header Website-Name "test";
}
}
}
And you should run the container as below
docker run --name infra-nginx -p 80:80 -d docker-registry.host.com:5000/infra-nginx:dev

Answer 2

You're making it way too complex. Just EXPOSE a port like 8080 from your app container.
In nginx use:
listen 80;
server_name _;
location / {
proxy_pass http://127.0.0.2:8080;
}

Answer 3

Ok I think the solution I did is simple enough.
First I have an app in nodejs running on the port 3000 on my local machine, so if I go to localhost:3000 in the browser I can see the app running.
Then I create a file called default.conf inside a folder in my machine ~/projects/docker/default.conf, you can create that file wherever you want. And paste this code inside the file:
server {
listen 80;
server_name myapp.com;
location / {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
Look the line proxy_pass http://localhost:3000; I am redirecting to my app running on my local machine.
Then I run a nginx container with the following command:
sudo docker run -d -p 80:80 --name="nginx" --net="host" -v ~/projects/docker/default.conf:/etc/nginx/conf.d/default.conf:ro nginx
The -p 80:80 is to bind that port to the nginx container
The --net="host" is to tell the container that the network it will use is the same that the host, it means the same as my machine, with this I can forward to the localhost:3000 from inside the container.
The -v ~/projects/docker/default.conf:/etc/nginx/conf.d/default.conf:ro
is to tell to the nginx that its configuration file will be the file I have in my local machine.
It means something like: You will find this /etc/nginx/conf.d/default.conf file in this ~/projects/docker/default.conf location
And that's all.
If I go to my browser and type just localhost (without the port) it will go through the nginx container and will be redirected to the app running in the localhost:3000 in my local machine
Let me know if this helps you