amazon web services - ASP.NET Core for AWS ECS requires VIRTUAL_HOST -


i'm deploying asp.net core web api app docker image aws ecs, use task definition file that.

it turns out app works if specify environment variable virtual_host public dns of ec2 instance (as highlighted here: http://docs.servicestack.net/deploy-netcore-docker-aws-ecs), see taskdef.json below:

{ "family": "...", "networkmode": "bridge", "containerdefinitions": [ { "image": "...", "name": "...", "cpu": 128, "memory": 256, "essential": true, "portmappings": [ { "containerport": 80, "hostport": 0, "protocol": "http" } ], "environment": [ { "name": "virtual_host", "value": "ec2-xx-xxx-xxx-xxx.compute-1.amazonaws.com" } ] } ] }

once app deployed aws ecs, hit endpoints - eg http://ec2-xx-xxx-xxx-xxx.compute-1.amazonaws.com/v1/ping

  • with actual public dns of ec2 instance in virtual_host works fine
  • without env variable i'm getting "503 service temporarily unavailable" nginx/1.13.0
  • and if put empty string virtual_host i'm getting "502 bad gateway" nginx/1.13.0.

now, i'd avoid specifying virtual host in taskdef file - possible? problem asp.net core related or nginx related?

amazon ecs have secret management system using amazon s3. have create secret in ecs interface, , able reference in configuration, environment variable.

{     "family": "...",     "networkmode": "bridge",     "containerdefinitions": [         {             "image": "...",             "name": "...",             "cpu": 128,             "memory": 256,             "essential": true,             "portmappings": [                 {                     "containerport": 80,                     "hostport": 0,                     "protocol": "http"                 }             ],             "environment": [                 {                     "name": "virtual_host",                     "value": "secret_s3_virtual_host"                 }             ]         }     ] }

store secrets on amazon s3, , use aws identity , access management (iam) roles grant access stored secrets in ecs.

full blog post

you make own nginx docker image, contain environment variable.

from nginx label maintainer your_email  env "virtual_host" "ec2-xx-xxx-xxxxxx.compute1.amazonaws.com"

and have build it, ship privately , use configuration.


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