redirect config and docs

README.md

@@ -37,6 +37,12 @@
 
 This is a log of important decisions made to the infrastructure, reasoning why a decision was made, and why other options were not chosen. Minor changes, like deploying an extra container, do not necessarily need to be a part of the decisions log. However, changes to the _way_ the infrastructure works should be documented here for future generations.
 
+### 2025-02-05: Traefik for redirects
+
+Use Traefik docker labels for redirects. That is, all subdomains should redirect to [osucyber.club](https://osucyber.club) if they are no used by anything else. Also, certain subdomains like [discord.osucyber.club](https://discord.osucyber.club) should go to a Discord invite link. An alternative (which was used before) was to have an API Gateway in front of a Lambda function which handles redirects. However, this introduces more complexity and adds more resources added to Terraform. Using Traefik is more since we already have it, and it requires only a small amount of configuration.
+
+First introduced in [77d1d881](https://github.com/cscosu/infra2/commit/77d1d8816cf29184120fc5c5df5193bd379b3052).
+
 ### 2025-02-02: Minimize root disk space
 
 Use minimal AMI instead of ECS optimized AMI. The ECS optimized AMI requires a minimum of a 30GB root volume, however we really only need a 4GB root volume. At $0.08/GB/month, this means $2.08/instance/month saved. The ECS agent cleans up old images every 30 minutes by default ([docs](https://github.com/aws/amazon-ecs-agent/blob/0f876b5372c9ecb15228f607f11d2c4be629d364/README.md#L206)), so there is little reason to worry about running out of storage. Additionally, it is easy to change the root storage if needed by just modifying the Terraform. This comes at a maintenance cost of additional user data script to install the required agents, though this should be just copy/paste.

traefik.tf

@@ -118,10 +118,22 @@ resource "aws_ecs_task_definition" "traefik" {
         "traefik.http.middlewares.redirect-to-main.redirectregex.regex"       = ".*"
         "traefik.http.middlewares.redirect-to-main.redirectregex.replacement" = "https://osucyber.club"
 
-        "traefik.http.routers.discord.rule"                                   = "Host(`discord.testing.osucyber.club`)"
-        "traefik.http.routers.discord.middlewares"                            = "redirect-discord"
-        "traefik.http.middlewares.redirect-discord.redirectregex.regex"       = ".*"
-        "traefik.http.middlewares.redirect-discord.redirectregex.replacement" = "https://discord.com"
+        "traefik.http.routers.discord.rule"                                       = "Host(`discord.testing.osucyber.club`)"
+        "traefik.http.routers.discord.middlewares"                                = "redirect-discord"
+        "traefik.http.middlewares.redirect-discord.redirectregex.regex"           = ".*"
+        "traefik.http.middlewares.redirect-discord.redirectregex.replacement"     = "https://discord.gg/x4VgQBTBCp"
+        "traefik.http.routers.zoom.rule"                                          = "Host(`zoom.testing.osucyber.club`)"
+        "traefik.http.routers.zoom.middlewares"                                   = "redirect-zoom"
+        "traefik.http.middlewares.redirect-zoom.redirectregex.regex"              = ".*"
+        "traefik.http.middlewares.redirect-zoom.redirectregex.replacement"        = "https://osu.zoom.us/j/94385413286?pwd=L2pHUEc0blZqV0Erc3pNeWxRTW4vUT09"
+        "traefik.http.routers.mailinglist.rule"                                   = "Host(`mailinglist.testing.osucyber.club`)"
+        "traefik.http.routers.mailinglist.middlewares"                            = "redirect-mailinglist"
+        "traefik.http.middlewares.redirect-mailinglist.redirectregex.regex"       = ".*"
+        "traefik.http.middlewares.redirect-mailinglist.redirectregex.replacement" = "https://eepurl.com/c0qMHn"
+        "traefik.http.routers.attend.rule"                                        = "Host(`attend.testing.osucyber.club`)"
+        "traefik.http.routers.attend.middlewares"                                 = "redirect-attend"
+        "traefik.http.middlewares.redirect-attend.redirectregex.regex"            = ".*"
+        "traefik.http.middlewares.redirect-attend.redirectregex.replacement"      = "https://auth.osucyber.club"
       }
 
       logConfiguration = {