amadan
docs: implementation plan for the Rails-behind-the-edge PoC
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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docs/superpowers/plans/2026-08-11-rails-behind-carlos-edge-poc.md+795 −0
diff --git a/docs/superpowers/plans/2026-08-11-rails-behind-carlos-edge-poc.md b/docs/superpowers/plans/2026-08-11-rails-behind-carlos-edge-poc.md| new file mode 100644 |
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| +# Rails behind the CARLOS edge (Classic/Pro staging PoC) Implementation Plan |
| + |
| +> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking. |
| + |
| +**Goal:** Serve Tito Classic and Tito Pro staging — full process tree, real staging dependencies — at `classic.platform.tito.io` / `pro.platform.tito.io` through the CARLOS edge, from two tofu-provisioned boxes running the Buildkite amd64 images. |
| + |
| +**Architecture:** Two x86 EC2 boxes in the `tito-tito-staging` VPC (native SG access to the staging Aurora/Valkey/Memcached), a new default↔staging VPC peering with `/32` routes for just the two box IPs (the default VPC already routes all of `10.0.0.0/16` to the *production* peering, so only host routes are safe), docker + systemd units running the k8s images, env from SSM Parameter Store, deploys over SSM RunCommand, and two `carlos add -kind service -addr` routes on the IE edge. |
| + |
| +**Tech Stack:** OpenTofu (`platform-infrastructure/tito/`), cloud-init, systemd, docker, AWS SSM, the `carlos` CLI on the IE box. |
| + |
| +**Spec:** `docs/superpowers/specs/2026-08-11-rails-behind-carlos-edge-poc-design.md` (this repo). |
| + |
| +## Global Constraints |
| + |
| +- AWS account `665106592142`, region `eu-west-1`, CLI profile `titogo`; tofu state `s3://carlos-tfstate-665106592142/tito/`. |
| +- **Targeted plans/applies only** in `platform-infrastructure/tito/` — the tree carries drift from open PRs and a full apply would strip live tcp/25 SMTP ingress (recorded in `tito/object-store.tf`'s commit message). |
| +- No SSH anywhere. All box operation via SSM (`aws ssm send-command` / session-manager). |
| +- Images are the Buildkite amd64 builds, **unmodified** — no rebuilds. |
| +- Secrets never in tofu, the repo, or terminal output — SSM Parameter Store `SecureString` only. |
| +- Never set `-hibernate` on the edge routes; the edge registry is `/data/registry.db`, written by `carlos add` run **as user `carlos`** on the IE box. |
| +- Staging only is applied; production tofu is written gated off (`rails_poc_prod_enabled = false`) and NOT applied. |
| +- Both repos use worktree discipline: infra work on a branch in a `platform-infrastructure` worktree; this plan/spec live on branch `rails-behind-edge-poc-spec` in `platform`. |
| + |
| +## Facts (preflighted 2026-08-11 — verify only if something disagrees) |
| + |
| +| Fact | Value | |
| +|---|---| |
| +| Default VPC (edge lives here) | `vpc-02416de3913753989`, `172.31.0.0/16`, main rtb `rtb-08863e575439a6377` | |
| +| IE edge box | `i-025a0b70f3d93304d`, private IP `172.31.4.137`, SG `carlos-tito-ie` (`module.host_ie.security_group_id`) | |
| +| Staging VPC | `vpc-03be5678d08549203` (`tito-tito-staging`), `10.0.0.0/16`; subnets `10.0.0.0/23`, `10.0.2.0/23`, `10.0.4.0/23`; igw rtb `rtb-041f57e000fb5797e`, main rtb `rtb-0a01ed1a14d1a52ce` | |
| +| Production VPC | `vpc-90dffef5`, also `10.0.0.0/16`; **existing peering** `pcx-056b55b69cbf89143`; default VPC routes `10.0.0.0/16 → pcx-056b…` already | |
| +| Classic staging DB | `tito-classic-mysql-staging-writer.cefg7n9rzaz0.eu-west-1.rds.amazonaws.com` (aurora-**mysql**, 3306) | |
| +| Pro staging DB | `tito-pro-postgres-staging-writer.cefg7n9rzaz0.eu-west-1.rds.amazonaws.com` (aurora-**postgresql**, 5432) | |
| +| Staging caches | `tito-classic-memcached-staging` (11211), `tito-classic-redis-staging-001` (valkey, 6379), `tito-pro-memcached-staging`, `tito-pro-redis-staging-001` | |
| +| Edge env | `PLATFORM_APPS_DOMAIN=platform.tito.io`, `CARLOS_WILDCARD_DOMAINS=go.tito.io` → `classic.`/`pro.platform.tito.io` get per-host HTTP-01 certs automatically once routed | |
| +| DNS | `*.platform.tito.io` A → IE EIP already live (`tito/dns.tf`) | |
| + |
| +**CIDR overlap rule:** staging subnets overlap production's `10.0.0.x–10.0.5.x` subnets exactly. The default VPC may only ever get `/32` routes toward staging, at addresses verified to have **no ENI in the production VPC** (that check is Task 1). |
| + |
| +--- |
| + |
| +### Task 1: Discovery — record the execution facts the tofu needs |
| + |
| +Read-only. Everything lands in `tito/rails-poc-facts.md` in the infra worktree so later tasks (and the prod apply later) never re-derive it. |
| + |
| +**Files:** |
| +- Create: `platform-infrastructure/tito/rails-poc-facts.md` |
| + |
| +**Interfaces:** |
| +- Produces: chosen box IPs (`classic_ip`, `pro_ip`), image refs (`classic_image`, `pro_image`), process commands (`WEB_COMMAND`, `WORKER_COMMAND`, `CLOCK_COMMAND` per app), web port + health path per app, staging DB/cache security-group IDs, box subnet ID. Task 2/3/6 consume these verbatim. |
| + |
| +- [ ] **Step 1: Create the infra worktree** |
| + |
| +```bash |
| +cd ~/github.com/carlosframework/platform-infrastructure |
| +git fetch origin |
| +git worktree add .claude/worktrees/rails-poc -b rails-poc origin/main |
| +cd .claude/worktrees/rails-poc |
| +``` |
| + |
| +- [ ] **Step 2: Find where Buildkite pushes the Classic/Pro images** |
| + |
| +```bash |
| +aws --profile titogo --region eu-west-1 ecr describe-repositories \ |
| + --query 'repositories[].repositoryUri' --output table | grep -i -E 'classic|pro|tito' |
| +``` |
| + |
| +If nothing matches, the images live outside ECR — ask Paul where Buildkite pushes (and how the boxes should authenticate); record the answer. Record the full image URI and the tag currently deployed to k8s staging for each app. |
| + |
| +- [ ] **Step 3: Record each app's process tree from the k8s staging manifests** |
| + |
| +Requires kubectl access to the staging cluster (Paul has it; if the session doesn't, ask Paul to paste the output): |
| + |
| +```bash |
| +kubectl get deploy -n <staging-namespace> -o jsonpath='{range .items[*]}{.metadata.name}{" cmd: "}{.spec.template.spec.containers[0].command}{" "}{.spec.template.spec.containers[0].args}{" port: "}{.spec.template.spec.containers[0].ports}{"\n"}{end}' |
| +``` |
| + |
| +Record per app: the web command + container port, worker command(s), clock/cron command (if any), and the HTTP health path the k8s probes use (`.livenessProbe.httpGet.path`). |
| + |
| +- [ ] **Step 4: Record the staging DB/cache security groups** |
| + |
| +```bash |
| +aws --profile titogo --region eu-west-1 rds describe-db-clusters \ |
| + --query 'DBClusters[?contains(DBClusterIdentifier,`staging`)].{id:DBClusterIdentifier,sg:VpcSecurityGroups[].VpcSecurityGroupId}' --output json |
| +aws --profile titogo --region eu-west-1 elasticache describe-cache-clusters \ |
| + --query 'CacheClusters[?contains(CacheClusterId,`staging`)].{id:CacheClusterId,sg:SecurityGroups[].SecurityGroupId}' --output json |
| +``` |
| + |
| +- [ ] **Step 5: Choose the two box IPs and prove the /32s shadow nothing** |
| + |
| +Pick the box subnet: whichever staging subnet is associated with the igw route table `rtb-041f57e000fb5797e` (check `aws ec2 describe-route-tables --route-table-ids rtb-041f57e000fb5797e --query 'RouteTables[].Associations'`). Pick two free IPs high in that subnet's range (e.g. `.200`/`.201` of its last /24), then verify **both** VPCs: |
| + |
| +```bash |
| +for ip in <candidate1> <candidate2>; do |
| + aws --profile titogo --region eu-west-1 ec2 describe-network-interfaces \ |
| + --filters Name=addresses.private-ip-address,Values=$ip \ |
| + --query 'NetworkInterfaces[].{vpc:VpcId,desc:Description}' --output json |
| +done |
| +``` |
| + |
| +Requirement: no ENI at that address in `vpc-90dffef5` (production — the /32 would shadow it from the default VPC) and none in `vpc-03be5678d08549203` (staging — the IP must be free to assign). Record IPs + the empty query output. |
| + |
| +- [ ] **Step 6: Commit the facts file** |
| + |
| +```bash |
| +git add tito/rails-poc-facts.md |
| +git commit -m "tito: record rails-poc execution facts (IPs, images, commands, SGs)" |
| +``` |
| + |
| +--- |
| + |
| +### Task 2: Networking tofu — peering and host routes |
| + |
| +**Files:** |
| +- Create: `platform-infrastructure/tito/rails-poc-network.tf` |
| + |
| +**Interfaces:** |
| +- Consumes: `classic_ip`, `pro_ip`, box subnet id from Task 1. |
| +- Produces: `aws_vpc_peering_connection.rails_poc_staging` and `local.rails_poc` locals; Task 3 references both. |
| + |
| +- [ ] **Step 1: Write `tito/rails-poc-network.tf`** |
| + |
| +```hcl |
| +# 🤖 Rails-behind-the-edge PoC (see platform repo spec 2026-08-11): the |
| +# edge (default VPC) reaches two staging Rails boxes over a peering. |
| +# The default VPC ALREADY routes 10.0.0.0/16 to the PRODUCTION peering |
| +# (pcx-056b55b69cbf89143) and staging shares that CIDR, so only /32 |
| +# host routes are safe here — each verified ENI-free in the production |
| +# VPC before choosing (tito/rails-poc-facts.md). |
| + |
| +locals { |
| + rails_poc = { |
| + default_vpc_id = "vpc-02416de3913753989" |
| + staging_vpc_id = "vpc-03be5678d08549203" |
| + default_rtb_id = "rtb-08863e575439a6377" |
| + staging_rtb_id = "<igw rtb from Task 1 step 5>" |
| + box_subnet_id = "<subnet from Task 1 step 5>" |
| + edge_private_ip = "172.31.4.137" |
| + classic_ip = "<from facts>" |
| + pro_ip = "<from facts>" |
| + } |
| +} |
| + |
| +resource "aws_vpc_peering_connection" "rails_poc_staging" { |
| + vpc_id = local.rails_poc.default_vpc_id |
| + peer_vpc_id = local.rails_poc.staging_vpc_id |
| + auto_accept = true |
| + tags = { Name = "carlos-tito-rails-poc-staging" } |
| +} |
| + |
| +resource "aws_route" "rails_poc_to_classic" { |
| + route_table_id = local.rails_poc.default_rtb_id |
| + destination_cidr_block = "${local.rails_poc.classic_ip}/32" |
| + vpc_peering_connection_id = aws_vpc_peering_connection.rails_poc_staging.id |
| +} |
| + |
| +resource "aws_route" "rails_poc_to_pro" { |
| + route_table_id = local.rails_poc.default_rtb_id |
| + destination_cidr_block = "${local.rails_poc.pro_ip}/32" |
| + vpc_peering_connection_id = aws_vpc_peering_connection.rails_poc_staging.id |
| +} |
| + |
| +# Return path: the box subnet's route table learns the default VPC. |
| +# 172.31.0.0/16 previously fell through to the igw (dropped); no live |
| +# traffic changes meaning. |
| +resource "aws_route" "rails_poc_return" { |
| + route_table_id = local.rails_poc.staging_rtb_id |
| + destination_cidr_block = "172.31.0.0/16" |
| + vpc_peering_connection_id = aws_vpc_peering_connection.rails_poc_staging.id |
| +} |
| +``` |
| + |
| +Replace the three `<…>` values from `rails-poc-facts.md` — they are Task 1 outputs, not decisions. |
| + |
| +- [ ] **Step 2: Targeted plan, verify it creates exactly 4 resources** |
| + |
| +```bash |
| +tofu -chdir=tito plan \ |
| + -target=aws_vpc_peering_connection.rails_poc_staging \ |
| + -target=aws_route.rails_poc_to_classic \ |
| + -target=aws_route.rails_poc_to_pro \ |
| + -target=aws_route.rails_poc_return |
| +``` |
| + |
| +Expected: `4 to add, 0 to change, 0 to destroy`. Anything else — stop, do not apply, diagnose. |
| + |
| +- [ ] **Step 3: Commit** |
| + |
| +```bash |
| +git add tito/rails-poc-network.tf |
| +git commit -m "tito: rails-poc peering + /32 host routes (staging PoC networking)" |
| +``` |
| + |
| +--- |
| + |
| +### Task 3: Box tofu — SGs, IAM, AMI, instances, cloud-init |
| + |
| +**Files:** |
| +- Create: `platform-infrastructure/tito/rails-poc-boxes.tf` |
| +- Create: `platform-infrastructure/tito/rails-poc-init.sh.tpl` |
| + |
| +**Interfaces:** |
| +- Consumes: `local.rails_poc` (Task 2), image URIs + ports + commands (Task 1 facts). |
| +- Produces: `aws_security_group.rails_poc["classic"|"pro"]` (Task 6 references), boxes tagged `carlos-tito-rails-classic-staging` / `carlos-tito-rails-pro-staging` (Tasks 5/8 find them by that tag), output `rails_poc_ips`. |
| + |
| +- [ ] **Step 1: Write `tito/rails-poc-boxes.tf`** |
| + |
| +```hcl |
| +# svc-pdf pattern scaled up: SSM-only IAM, SG trust, docker via |
| +# cloud-init. x86 because the Buildkite images are amd64 (spec §1) — |
| +# the fleet's shared AMI is arm64, so a separate amd64 data source. |
| + |
| +data "aws_ami" "rails_poc_debian_amd64" { |
| + most_recent = true |
| + owners = ["136693071363"] # Debian official |
| + filter { |
| + name = "name" |
| + values = ["debian-13-amd64-*"] |
| + } |
| + filter { |
| + name = "architecture" |
| + values = ["x86_64"] |
| + } |
| +} |
| + |
| +locals { |
| + rails_poc_apps = { |
| + classic = { ip = local.rails_poc.classic_ip, port = <classic web port>, image = "<classic image uri>" } |
| + pro = { ip = local.rails_poc.pro_ip, port = <pro web port>, image = "<pro image uri>" } |
| + } |
| +} |
| + |
| +resource "aws_security_group" "rails_poc" { |
| + for_each = local.rails_poc_apps |
| + name = "carlos-tito-rails-${each.key}-staging" |
| + description = "Rails PoC ${each.key}: web port from the IE edge only" |
| + vpc_id = local.rails_poc.staging_vpc_id |
| + ingress { |
| + from_port = each.value.port |
| + to_port = each.value.port |
| + protocol = "tcp" |
| + cidr_blocks = ["${local.rails_poc.edge_private_ip}/32"] |
| + } |
| + egress { |
| + from_port = 0 |
| + to_port = 0 |
| + protocol = "-1" |
| + cidr_blocks = ["0.0.0.0/0"] |
| + } |
| +} |
| + |
| +resource "aws_iam_role" "rails_poc" { |
| + for_each = local.rails_poc_apps |
| + name = "carlos-tito-rails-${each.key}-staging" |
| + assume_role_policy = jsonencode({ |
| + Version = "2012-10-17" |
| + Statement = [{ |
| + Effect = "Allow" |
| + Principal = { Service = "ec2.amazonaws.com" } |
| + Action = "sts:AssumeRole" |
| + }] |
| + }) |
| +} |
| + |
| +resource "aws_iam_role_policy_attachment" "rails_poc_ssm" { |
| + for_each = local.rails_poc_apps |
| + role = aws_iam_role.rails_poc[each.key].name |
| + policy_arn = "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore" |
| +} |
| + |
| +resource "aws_iam_role_policy" "rails_poc_pull_and_env" { |
| + for_each = local.rails_poc_apps |
| + name = "pull-and-env" |
| + role = aws_iam_role.rails_poc[each.key].id |
| + policy = jsonencode({ |
| + Version = "2012-10-17" |
| + Statement = [ |
| + { Effect = "Allow", Action = ["ecr:GetAuthorizationToken"], Resource = "*" }, |
| + { Effect = "Allow", |
| + Action = ["ecr:BatchGetImage", "ecr:GetDownloadUrlForLayer", "ecr:BatchCheckLayerAvailability"], |
| + Resource = "<repo arn(s) for ${each.key} from Task 1>" }, |
| + { Effect = "Allow", Action = ["ssm:GetParameter"], |
| + Resource = "arn:aws:ssm:eu-west-1:665106592142:parameter/tito/rails-poc/${each.key}-staging/*" }, |
| + ] |
| + }) |
| +} |
| + |
| +resource "aws_iam_instance_profile" "rails_poc" { |
| + for_each = local.rails_poc_apps |
| + name = "carlos-tito-rails-${each.key}-staging" |
| + role = aws_iam_role.rails_poc[each.key].name |
| +} |
| + |
| +resource "aws_instance" "rails_poc" { |
| + for_each = local.rails_poc_apps |
| + ami = data.aws_ami.rails_poc_debian_amd64.id |
| + instance_type = "t3a.large" |
| + subnet_id = local.rails_poc.box_subnet_id |
| + private_ip = each.value.ip |
| + associate_public_ip_address = true # egress for SSM/ECR/apt; ingress is SG-closed |
| + vpc_security_group_ids = [aws_security_group.rails_poc[each.key].id] |
| + iam_instance_profile = aws_iam_instance_profile.rails_poc[each.key].name |
| + user_data = templatefile("${path.module}/rails-poc-init.sh.tpl", { |
| + app = each.key |
| + port = each.value.port |
| + }) |
| + user_data_replace_on_change = false |
| + root_block_device { |
| + volume_size = 40 |
| + volume_type = "gp3" |
| + encrypted = true |
| + } |
| + tags = { Name = "carlos-tito-rails-${each.key}-staging" } |
| + # Same floating-AMI trap as svc-pdf.tf: without this a newer Debian |
| + # image turns `tofu apply` into "replace the box". |
| + lifecycle { |
| + ignore_changes = [ami] |
| + } |
| +} |
| + |
| +output "rails_poc_ips" { |
| + value = { for k, v in aws_instance.rails_poc : k => v.private_ip } |
| +} |
| +``` |
| + |
| +- [ ] **Step 2: Write `tito/rails-poc-init.sh.tpl`** |
| + |
| +```bash |
| +#!/bin/bash |
| +# 🤖 Rails PoC box init (${app}): docker + ECR helper + env from SSM + |
| +# systemd units for the full process tree. Deploys happen via |
| +# scripts/rails-poc-deploy.sh over SSM — first boot starts nothing |
| +# until a deploy writes /etc/rails-poc/image. |
| +set -euo pipefail |
| +export DEBIAN_FRONTEND=noninteractive |
| +apt-get update |
| +apt-get install -y docker.io amazon-ecr-credential-helper awscli jq |
| + |
| +mkdir -p /root/.docker /etc/rails-poc |
| +cat > /root/.docker/config.json <<'EOF' |
| +{ "credsStore": "ecr-login" } |
| +EOF |
| + |
| +# App env from SSM (SecureString), 0600. Refreshed on every deploy too. |
| +cat > /usr/local/bin/rails-poc-fetch-env <<'EOF' |
| +#!/bin/bash |
| +set -euo pipefail |
| +aws ssm get-parameter --region eu-west-1 --with-decryption \ |
| + --name /tito/rails-poc/${app}-staging/env \ |
| + --query Parameter.Value --output text > /etc/rails-poc/app.env.new |
| +chmod 600 /etc/rails-poc/app.env.new |
| +mv /etc/rails-poc/app.env.new /etc/rails-poc/app.env |
| +EOF |
| +chmod 755 /usr/local/bin/rails-poc-fetch-env |
| + |
| +# One runner for every role; the role's command comes from the env file |
| +# (WEB_COMMAND / WORKER_COMMAND / CLOCK_COMMAND, recorded from the k8s |
| +# manifests in rails-poc-facts.md). |
| +cat > /usr/local/bin/rails-poc-run <<'EOF' |
| +#!/bin/bash |
| +set -euo pipefail |
| +role="$1" |
| +image="$(cat /etc/rails-poc/image)" |
| +source /etc/rails-poc/app.env |
| +var="$(echo "$role" | tr a-z A-Z)_COMMAND" |
| +publish="" |
| +[ "$role" = web ] && publish="-p ${port}:${port}" |
| +exec docker run --rm --name "rails-$role" $publish \ |
| + --env-file /etc/rails-poc/app.env "$image" $${!var} |
| +EOF |
| +chmod 755 /usr/local/bin/rails-poc-run |
| + |
| +for role in web worker clock; do |
| +cat > /etc/systemd/system/rails-$role.service <<EOF |
| +[Unit] |
| +Description=Rails PoC ${app} $role |
| +After=docker.service network-online.target |
| +Requires=docker.service |
| +[Service] |
| +ExecStartPre=-/usr/bin/docker rm -f rails-$role |
| +ExecStart=/usr/local/bin/rails-poc-run $role |
| +Restart=always |
| +RestartSec=5 |
| +[Install] |
| +WantedBy=multi-user.target |
| +EOF |
| +done |
| +systemctl daemon-reload |
| +# Deliberately NOT enabled/started: the first deploy does that, once |
| +# /etc/rails-poc/image exists and the env parameter is populated. |
| +/usr/local/bin/rails-poc-fetch-env || true |
| +``` |
| + |
| +Note the tpl escaping: `${app}` / `${port}` are template vars; `$${!var}` renders as shell `${!var}`. If an app has no clock process (Task 1 facts), that unit simply never gets enabled. |
| + |
| +- [ ] **Step 3: Targeted plan** |
| + |
| +```bash |
| +tofu -chdir=tito plan $(printf ' -target=%s' \ |
| + aws_security_group.rails_poc 'aws_iam_role.rails_poc' \ |
| + 'aws_iam_role_policy_attachment.rails_poc_ssm' 'aws_iam_role_policy.rails_poc_pull_and_env' \ |
| + 'aws_iam_instance_profile.rails_poc' 'aws_instance.rails_poc') |
| +``` |
| + |
| +Expected: adds only (2 SGs, 2 roles, 2 attachments, 2 policies, 2 profiles, 2 instances = 12), zero change/destroy. Verify the plan shows `t3a.large` and an `debian-13-amd64` AMI. |
| + |
| +- [ ] **Step 4: Commit** |
| + |
| +```bash |
| +git add tito/rails-poc-boxes.tf tito/rails-poc-init.sh.tpl |
| +git commit -m "tito: rails-poc staging boxes (x86, docker+systemd, SSM-only)" |
| +``` |
| + |
| +--- |
| + |
| +### Task 4: SSM env parameters (operator step with Paul) |
| + |
| +**Files:** none (parameters live in SSM only, per Global Constraints). |
| + |
| +**Interfaces:** |
| +- Produces: `/tito/rails-poc/classic-staging/env` and `/tito/rails-poc/pro-staging/env` (SecureString, env-file format). Task 3's boxes and Task 5 depend on them existing. |
| + |
| +- [ ] **Step 1: Assemble each app's env from the k8s staging config** |
| + |
| +The k8s deployment's env (ConfigMap + Secrets) IS the source; dump it with Paul (values must not land in the transcript — pipe to a root-owned temp file, or Paul runs it): |
| + |
| +```bash |
| +kubectl -n <staging-namespace> exec deploy/<web-deploy> -- env | sort > /tmp/classic-staging.env |
| +``` |
| + |
| +Then append the three process-command lines from `rails-poc-facts.md`: |
| + |
| +``` |
| +WEB_COMMAND=<web command> |
| +WORKER_COMMAND=<worker command> |
| +CLOCK_COMMAND=<clock command, omit line if none> |
| +``` |
| + |
| +Prune k8s-runtime noise (`KUBERNETES_*`, `*_SERVICE_HOST`, `*_SERVICE_PORT`, `HOSTNAME`, `PATH`, `HOME`). Everything Rails reads stays. |
| + |
| +- [ ] **Step 2: Store as SecureString and shred the temp file** |
| + |
| +```bash |
| +aws --profile titogo --region eu-west-1 ssm put-parameter \ |
| + --name /tito/rails-poc/classic-staging/env --type SecureString \ |
| + --value file:///tmp/classic-staging.env |
| +shred -u /tmp/classic-staging.env |
| +``` |
| + |
| +Repeat for pro. Verify with `aws ssm get-parameter --name … --query Parameter.Version` (never `--with-decryption` in the transcript). |
| + |
| +--- |
| + |
| +### Task 5: Apply and boot the boxes |
| + |
| +**Interfaces:** |
| +- Consumes: Tasks 2–4 all landed. |
| +- Produces: two running boxes answering SSM, env fetched; nothing serving yet (first deploy is Task 8). |
| + |
| +- [ ] **Step 1: Targeted apply — networking first, then boxes** |
| + |
| +```bash |
| +tofu -chdir=tito apply \ |
| + -target=aws_vpc_peering_connection.rails_poc_staging \ |
| + -target=aws_route.rails_poc_to_classic \ |
| + -target=aws_route.rails_poc_to_pro \ |
| + -target=aws_route.rails_poc_return |
| +tofu -chdir=tito apply $(printf ' -target=%s' \ |
| + aws_security_group.rails_poc 'aws_iam_role.rails_poc' \ |
| + 'aws_iam_role_policy_attachment.rails_poc_ssm' 'aws_iam_role_policy.rails_poc_pull_and_env' \ |
| + 'aws_iam_instance_profile.rails_poc' 'aws_instance.rails_poc') |
| +``` |
| + |
| +Review each plan before confirming — adds only, and the route apply must show exactly the two `/32`s + return route + peering. |
| + |
| +- [ ] **Step 2: Verify both boxes via SSM** |
| + |
| +```bash |
| +for tag in classic pro; do |
| + iid=$(aws --profile titogo --region eu-west-1 ec2 describe-instances \ |
| + --filters Name=tag:Name,Values=carlos-tito-rails-$tag-staging Name=instance-state-name,Values=running \ |
| + --query 'Reservations[].Instances[].InstanceId' --output text) |
| + cid=$(aws --profile titogo --region eu-west-1 ssm send-command --instance-ids "$iid" \ |
| + --document-name AWS-RunShellScript \ |
| + --parameters 'commands=["docker --version; ls -l /etc/rails-poc/app.env; systemctl list-unit-files rails-*"]' \ |
| + --query Command.CommandId --output text) |
| + sleep 8 |
| + aws --profile titogo --region eu-west-1 ssm get-command-invocation \ |
| + --command-id "$cid" --instance-id "$iid" --query '{s:Status,o:StandardOutputContent}' --output json |
| +done |
| +``` |
| + |
| +Expected: docker installed, `app.env` present mode 0600, three `rails-*.service` unit files. If `app.env` is missing, cloud-init ran before Task 4's parameters existed — rerun `/usr/local/bin/rails-poc-fetch-env` via SSM. |
| + |
| +- [ ] **Step 3: Commit the facts-file update (instance IDs)** |
| + |
| +```bash |
| +git add tito/rails-poc-facts.md |
| +git commit -m "tito: rails-poc boxes applied; record instance ids" |
| +``` |
| + |
| +--- |
| + |
| +### Task 6: Open the staging dependencies to the boxes |
| + |
| +**Files:** |
| +- Create: `platform-infrastructure/tito/rails-poc-deps.tf` |
| + |
| +**Interfaces:** |
| +- Consumes: staging DB/cache SG IDs (Task 1 facts), `aws_security_group.rails_poc` (Task 3). |
| + |
| +- [ ] **Step 1: Write `tito/rails-poc-deps.tf`** |
| + |
| +```hcl |
| +# Ingress on the (externally-managed) staging dependency SGs admitting |
| +# the PoC boxes. aws_security_group_rule against SG ids this tree does |
| +# not own — removal of the PoC removes exactly these rules and nothing |
| +# else. Classic is MySQL, Pro is Postgres (rails-poc-facts.md). |
| + |
| +locals { |
| + rails_poc_dep_rules = { |
| + classic_mysql = { sg = "<classic staging DB sg>", port = 3306, app = "classic" } |
| + classic_valkey = { sg = "<classic staging redis sg>", port = 6379, app = "classic" } |
| + classic_memcached = { sg = "<classic staging memcached sg>", port = 11211, app = "classic" } |
| + pro_postgres = { sg = "<pro staging DB sg>", port = 5432, app = "pro" } |
| + pro_valkey = { sg = "<pro staging redis sg>", port = 6379, app = "pro" } |
| + pro_memcached = { sg = "<pro staging memcached sg>", port = 11211, app = "pro" } |
| + } |
| +} |
| + |
| +resource "aws_security_group_rule" "rails_poc_dep" { |
| + for_each = local.rails_poc_dep_rules |
| + type = "ingress" |
| + security_group_id = each.value.sg |
| + from_port = each.value.port |
| + to_port = each.value.port |
| + protocol = "tcp" |
| + source_security_group_id = aws_security_group.rails_poc[each.value.app].id |
| + description = "rails-poc ${each.value.app} staging box" |
| +} |
| +``` |
| + |
| +(Same-VPC SG references — the boxes live in the staging VPC precisely so this works.) |
| + |
| +- [ ] **Step 2: Targeted plan (6 adds only), apply, commit** |
| + |
| +```bash |
| +tofu -chdir=tito plan -target=aws_security_group_rule.rails_poc_dep |
| +tofu -chdir=tito apply -target=aws_security_group_rule.rails_poc_dep |
| +git add tito/rails-poc-deps.tf |
| +git commit -m "tito: rails-poc staging dependency SG ingress" |
| +``` |
| + |
| +- [ ] **Step 3: Prove connectivity from each box (SSM)** |
| + |
| +```bash |
| +# on the classic box via send-command: |
| +timeout 3 bash -c '</dev/tcp/tito-classic-mysql-staging-writer.cefg7n9rzaz0.eu-west-1.rds.amazonaws.com/3306' && echo mysql-ok |
| +timeout 3 bash -c '</dev/tcp/<classic redis endpoint>/6379' && echo valkey-ok |
| +timeout 3 bash -c '</dev/tcp/<classic memcached endpoint>/11211' && echo memcached-ok |
| +# pro box: postgres 5432 + its two caches |
| +``` |
| + |
| +Expected: three `*-ok` lines per box. A hang means the SG rule or a subnet route is wrong — fix before proceeding. |
| + |
| +--- |
| + |
| +### Task 7: Edge routes |
| + |
| +**Interfaces:** |
| +- Consumes: box IPs + web ports (facts), boxes booted (Task 5). |
| +- Produces: `classic.platform.tito.io` / `pro.platform.tito.io` routed (503/refused until Task 8 deploys). |
| + |
| +- [ ] **Step 1: Add both routes on the IE box via SSM, as user `carlos`** |
| + |
| +```bash |
| +aws --profile titogo --region eu-west-1 ssm send-command --instance-ids i-025a0b70f3d93304d \ |
| + --document-name AWS-RunShellScript --parameters 'commands=[ |
| + "sudo -u carlos /opt/carlos/carlos add -kind service -addr <classic_ip>:<classic port> classic.platform.tito.io", |
| + "sudo -u carlos /opt/carlos/carlos add -kind service -addr <pro_ip>:<pro port> pro.platform.tito.io" |
| + ]' --query Command.CommandId --output text |
| +``` |
| + |
| +Fetch the invocation output; each line must say `added` (or `updated … (existing route)` on a re-run — `carlos add` upserts; that is also how an upstream gets repointed). **No `-hibernate`, ever, on these routes.** |
| + |
| +- [ ] **Step 2: Verify TLS + routing end to end** |
| + |
| +```bash |
| +curl -sv https://classic.platform.tito.io/ -o /dev/null 2>&1 | grep -E 'subject:|HTTP/' |
| +curl -sv https://pro.platform.tito.io/ -o /dev/null 2>&1 | grep -E 'subject:|HTTP/' |
| +``` |
| + |
| +Expected: a Let's Encrypt cert for each exact hostname (first hit may take a few seconds while HTTP-01 completes), then `502`/`503` — the edge is up, nothing listens on the box yet. A TLS `internal error` alert means the route didn't land in `/data/registry.db`; re-check Step 1's output. |
| + |
| +--- |
| + |
| +### Task 8: Deploy script + first deploy |
| + |
| +**Files:** |
| +- Create: `platform-infrastructure/scripts/rails-poc-deploy.sh` |
| + |
| +**Interfaces:** |
| +- Consumes: everything above; image tag currently on k8s staging (facts). |
| +- Produces: `rails-poc-deploy.sh <classic|pro> <image-ref>` — THE deploy path from here on. |
| + |
| +- [ ] **Step 1: Write `scripts/rails-poc-deploy.sh`** |
| + |
| +```bash |
| +#!/bin/bash |
| +# 🤖 Deploy a Rails PoC box over SSM: refresh env, point at the image, |
| +# restart the tree, wait for health through the edge. |
| +# Usage: rails-poc-deploy.sh <classic|pro> <image-ref> |
| +set -euo pipefail |
| +app="$1"; image="$2" |
| +region=eu-west-1; profile=titogo |
| +iid=$(aws --profile $profile --region $region ec2 describe-instances \ |
| + --filters Name=tag:Name,Values=carlos-tito-rails-$app-staging Name=instance-state-name,Values=running \ |
| + --query 'Reservations[].Instances[].InstanceId' --output text) |
| +[ -n "$iid" ] || { echo "no running box for $app" >&2; exit 1; } |
| + |
| +cid=$(aws --profile $profile --region $region ssm send-command --instance-ids "$iid" \ |
| + --document-name AWS-RunShellScript --parameters commands="[ |
| + \"/usr/local/bin/rails-poc-fetch-env\", |
| + \"docker pull $image\", |
| + \"echo $image > /etc/rails-poc/image\", |
| + \"systemctl enable rails-web rails-worker\", |
| + \"systemctl restart rails-web rails-worker\", |
| + \"systemctl is-enabled rails-clock >/dev/null 2>&1 && systemctl restart rails-clock || true\" |
| + ]" --query Command.CommandId --output text) |
| + |
| +for i in $(seq 1 60); do |
| + st=$(aws --profile $profile --region $region ssm get-command-invocation \ |
| + --command-id "$cid" --instance-id "$iid" --query Status --output text) |
| + [ "$st" = Success ] && break |
| + [ "$st" = Failed ] && { aws --profile $profile --region $region ssm get-command-invocation \ |
| + --command-id "$cid" --instance-id "$iid" --query StandardErrorContent --output text >&2; exit 1; } |
| + sleep 5 |
| +done |
| + |
| +url="https://$app.platform.tito.io<health path from facts>" |
| +for i in $(seq 1 30); do |
| + code=$(curl -s -o /dev/null -w '%{http_code}' "$url") && [ "$code" = 200 ] && { echo "$app healthy: $url"; exit 0; } |
| + sleep 5 |
| +done |
| +echo "$app not healthy after deploy ($url last code $code)" >&2; exit 1 |
| +``` |
| + |
| +`chmod +x scripts/rails-poc-deploy.sh`. (Apps with a clock process get it enabled once, manually, via SSM: `systemctl enable rails-clock` — the script then keeps restarting it.) |
| + |
| +- [ ] **Step 2: First deploys, with the tag k8s staging currently runs** |
| + |
| +```bash |
| +./scripts/rails-poc-deploy.sh classic <classic image:tag from facts> |
| +./scripts/rails-poc-deploy.sh pro <pro image:tag from facts> |
| +``` |
| + |
| +Expected: both end with `healthy`. Debug path if not: `journalctl -u rails-web -n 100` via SSM on the box. Likely first-boot issues: a missing env var (fix the SSM parameter, redeploy), or the app binding localhost only (the k8s manifests' web command already binds 0.0.0.0 — reuse it exactly). |
| + |
| +- [ ] **Step 3: Verify the full tree and the replica behavior** |
| + |
| +```bash |
| +# via SSM on each box: |
| +docker ps --format '{{.Names}} {{.Status}}' # rails-web, rails-worker (+ rails-clock) |
| +``` |
| + |
| +Then the shared-queue proof: with Paul, enqueue a staging background job through the **k8s** app (or its console) and watch it get picked up on a PoC box: `journalctl -u rails-worker -f` via an SSM session. A job processed on the PoC box while k8s workers also run = the parallel-replica claim, proven. |
| + |
| +- [ ] **Step 4: Commit** |
| + |
| +```bash |
| +git add scripts/rails-poc-deploy.sh |
| +git commit -m "scripts: rails-poc deploy over SSM (pull, restart, edge health)" |
| +``` |
| + |
| +--- |
| + |
| +### Task 9: Production tofu — written, gated off |
| + |
| +**Files:** |
| +- Create: `platform-infrastructure/tito/rails-poc-prod.tf` |
| + |
| +- [ ] **Step 1: Write the gated file** |
| + |
| +```hcl |
| +# 🤖 Production twin of the staging PoC — WRITTEN, NOT APPLIED (spec: |
| +# staging first; flipping this variable is the post-PoC decision). |
| +# Networking is SIMPLER than staging: the default VPC already routes |
| +# 10.0.0.0/16 to the existing production peering pcx-056b55b69cbf89143, |
| +# so prod boxes need NO new peering and NO new routes — only boxes, |
| +# SG rules on the prod dependency SGs, and /tito/rails-poc/<app>-prod/env |
| +# parameters. Fill the <…> values from a prod re-run of Task 1 |
| +# (rails-poc-facts.md gets a prod section) before ever enabling. |
| + |
| +variable "rails_poc_prod_enabled" { |
| + type = bool |
| + default = false |
| +} |
| + |
| +resource "aws_instance" "rails_poc_prod" { |
| + for_each = var.rails_poc_prod_enabled ? { |
| + classic = { ip = "<prod classic ip — ENI-free check vs BOTH VPCs>", port = <port>, subnet = "<prod subnet>" } |
| + pro = { ip = "<prod pro ip>", port = <port>, subnet = "<prod subnet>" } |
| + } : {} |
| + ami = data.aws_ami.rails_poc_debian_amd64.id |
| + instance_type = "t3a.large" |
| + subnet_id = each.value.subnet |
| + private_ip = each.value.ip |
| + vpc_security_group_ids = [] # prod SGs defined alongside when enabling |
| + user_data = templatefile("${path.module}/rails-poc-init.sh.tpl", { |
| + app = each.key |
| + port = each.value.port |
| + }) |
| + root_block_device { |
| + volume_size = 40 |
| + volume_type = "gp3" |
| + encrypted = true |
| + } |
| + tags = { Name = "carlos-tito-rails-${each.key}-prod" } |
| + lifecycle { ignore_changes = [ami] } |
| +} |
| +``` |
| + |
| +- [ ] **Step 2: Prove it is inert, commit** |
| + |
| +```bash |
| +tofu -chdir=tito plan -target=aws_instance.rails_poc_prod |
| +# Expected: "No changes." — the empty for_each makes it a no-op. |
| +git add tito/rails-poc-prod.tf |
| +git commit -m "tito: rails-poc production twin, gated off (post-PoC decision)" |
| +``` |
| + |
| +--- |
| + |
| +### Task 10: Runbook, PRs, and the evaluation record |
| + |
| +**Files:** |
| +- Modify: `platform-infrastructure/tito/README.md` (append a `## Rails PoC` section) |
| +- Modify (platform repo, branch `rails-behind-edge-poc-spec`): the spec's §7 — check off what was actually met |
| + |
| +- [ ] **Step 1: Append the runbook to `tito/README.md`** |
| + |
| +```markdown |
| +## Rails PoC (classic/pro staging behind the edge) |
| + |
| +Spec + plan: platform repo `docs/superpowers/{specs,plans}/2026-08-11-rails-behind-carlos-edge-poc*`. |
| +Facts (IPs, images, SGs): `tito/rails-poc-facts.md`. |
| + |
| +- Deploy: `scripts/rails-poc-deploy.sh <classic|pro> <image-ref>` (SSM; no SSH). |
| +- Routes live in the IE box's `/data/registry.db` (`carlos add` as user |
| + `carlos`; re-run to repoint; NEVER `-hibernate` on these). |
| +- Logs: `journalctl -u rails-{web,worker,clock}` via SSM on the box. |
| +- Teardown: remove the routes on the IE box, then targeted destroys of |
| + `aws_instance.rails_poc`, `aws_security_group_rule.rails_poc_dep`, |
| + the two `/32` `aws_route.rails_poc_to_*`, `aws_route.rails_poc_return`, |
| + `aws_vpc_peering_connection.rails_poc_staging`; delete the |
| + `/tito/rails-poc/*` SSM parameters. |
| +- The default VPC's `10.0.0.0/16 → pcx-056b55b69cbf89143` (production) |
| + route is why staging only ever gets `/32` routes — do not "simplify". |
| +- Fallback if a shared cache is unreachable (spec §"Decisions"): an |
| + on-box memcached is one unit away — |
| + `docker run -d --restart=always -p 127.0.0.1:11211:11211 memcached:1.6` |
| + plus pointing the app's cache env var at `127.0.0.1:11211`. Documented |
| + fallback only; the default is the shared staging Elasticache. |
| +``` |
| + |
| +- [ ] **Step 2: During the parallel-run week, record the §7 gap list against reality** |
| + |
| +In the spec (platform repo), annotate each §7 item with what actually happened (e.g. "config delivery: hand-rolled SSM fetch worked but rotation is manual — a real `appconfig` gap"). This annotated list is the deliverable of the evaluation. |
| + |
| +- [ ] **Step 3: Open the PRs** |
| + |
| +```bash |
| +# infra: |
| +cd ~/github.com/carlosframework/platform-infrastructure/.claude/worktrees/rails-poc |
| +git push -u origin rails-poc |
| +gh pr create --title "tito: Rails-behind-the-edge staging PoC (classic/pro)" \ |
| + --body "Boxes, peering, dep SG rules, deploy script per the platform repo spec 2026-08-11-rails-behind-carlos-edge-poc-design.md. Targeted applies only — see plan. |
| + |
| +🤖 Generated with [Claude Code](https://claude.com/claude-code)" |
| +# spec+plan: |
| +cd ~/github.com/carlosframework/platform/.claude/worktrees/rails-behind-edge-poc-spec |
| +git push -u origin rails-behind-edge-poc-spec |
| +gh pr create --title "docs: Rails-behind-the-edge PoC — design record + implementation plan" \ |
| + --body "Design + plan for serving Tito Classic/Pro staging through the CARLOS edge (spec approved by Paul 2026-08-11). |
| + |
| +🤖 Generated with [Claude Code](https://claude.com/claude-code)" |
| +``` |
| + |
| +--- |
| + |
| +## Execution notes |
| + |
| +- Tasks 1→8 are strictly ordered; 9 and 10 can follow any time after 3 and 8 respectively. |
| +- Applies (Tasks 5, 6) and anything touching the IE box (Task 7) or k8s (Tasks 1, 4, 8) are operator-visible actions — do them deliberately, one at a time, reading every plan before confirming. |
| +- If any targeted plan proposes a change or destroy outside the `rails_poc*` names, STOP — that is the known tree drift; never apply through it. |