Proxying requests via nginx is well described at:
- https://www.digitalocean.com/community/tutorials/understanding-nginx-http-proxying-load-balancing-buffering-and-caching.
- https://www.digitalocean.com/community/tutorials/docker-explained-how-to-containerize-and-use-nginx-as-a-proxy
Although it is PHP, there is a good tutorial for what we want to achieve at http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker_ecstutorial.html.
In a new directory, let's ceate Dockerrun.aws.json:
{
"AWSEBDockerrunVersion": 2,
"volumes": [
{
"name": "nginx-proxy-conf",
"host": {
"sourcePath": "/var/app/current/proxy/conf.d"
}
}
],
"containerDefinitions": [
{
"name": "webapp",
"image": "jlchereau/docker-aws",
"essential": true,
"memory": 128
},
{
"name": "nginx-proxy",
"image": "nginx",
"essential": true,
"memory": 128,
"portMappings": [
{
"hostPort": 80,
"containerPort": 80
}
],
"links": [
"webapp"
],
"mountPoints": [
{
"sourceVolume": "nginx-proxy-conf",
"containerPath": "/etc/nginx/conf.d",
"readOnly": true
}
]
}
]
}and in a subdirectory, let's create proxy/conf.d/default.conf:
# our nodejs app
upstream webapps {
server webapp:8080;
}
# the nginx server instance
server {
listen 80;
# pass the request to the node.js server with the correct headers
# and much more can be added, see nginx config options
location / {
proxy_pass http://webapps/;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
}
Let's zip Dockerrun.aws.json and proxy/conf.d/default.conf together and let's create a new application in AWS Elastic Beanstalk for this zip.
Docker-AWS is now proxied through nginx. The configuration with one app server is available at https://github.com/jlchereau/Docker-AWS/tree/master/steps/7%20NGINX%20-%20one%20app%20server.
See also http://stackoverflow.com/questions/5009324/node-js-nginx-and-now and http://nginx.org/en/docs/http/ngx_http_core_module.html#location.
For two app servers, these files need to be modified as follows:
{
"AWSEBDockerrunVersion": 2,
"volumes": [
{
"name": "nginx-proxy-conf",
"host": {
"sourcePath": "/var/app/current/proxy/conf.d"
}
}
],
"containerDefinitions": [
{
"name": "webapp1",
"image": "jlchereau/docker-aws",
"essential": true,
"memory": 128
},
{
"name": "webapp2",
"image": "jlchereau/docker-aws",
"essential": true,
"memory": 128
},
{
"name": "nginx-proxy",
"image": "nginx",
"essential": true,
"memory": 128,
"portMappings": [
{
"hostPort": 80,
"containerPort": 80
}
],
"links": [
"webapp1",
"webapp2"
],
"mountPoints": [
{
"sourceVolume": "nginx-proxy-conf",
"containerPath": "/etc/nginx/conf.d",
"readOnly": true
}
]
}
]
}# our nodejs app
upstream webapps {
server webapp1:8080;
server webapp2:8080;
}
# the nginx server instance
server {
listen 80;
# pass the request to the node.js server with the correct headers
# and much more can be added, see nginx config options
location / {
proxy_pass http://webapps;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
}
Let's zip Dockerrun.aws.json and proxy/conf.d/default.conf together and let's create a new application in AWS Elastic Beanstalk for this zip.
Docker-AWS is now proxied through nginx. and two app servers are load balanced on the same EC2 instance. The configuration with two app servers is available at https://github.com/jlchereau/Docker-AWS/tree/master/steps/8%20NGINX%20-%20two%20app%20servers.
See http://stackoverflow.com/questions/28315706/how-to-load-balance-containers.
GZip compression is documented at:
- http://nginx.com/resources/admin-guide/compression-and-decompression/
- http://nginx.org/en/docs/http/ngx_http_gzip_module.html.
In order to add GZIP compression to nginx, we only need to modify proxy/conf.d/default.conf as follows:
# our nodejs app
upstream webapps {
server webapp1:8080;
server webapp2:8080;
}
# the nginx server instance
server {
listen 80;
# gzip
gzip on;
gzip_proxied any;
gzip_vary on;
# pass the request to the node.js server with the correct headers
# and much more can be added, see nginx config options
location / {
proxy_pass http://webapps;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
}
Let's zip Dockerrun.aws.json and proxy/conf.d/default.conf together and let's create a new application in AWS Elastic Beanstalk for this zip.
Docker-AWS is now proxied through nginx with GZip compression. The configuration with Gzip compression is available at https://github.com/jlchereau/Docker-AWS/tree/master/steps/9%20NGINX%20GZIP%20Compression.
GZIP compression can be checked at http://www.giftofspeed.com/gzip-test/.
