multinode_test.cg

# Multi-node orchestration test — .cg brace-delimited format
# Equivalent to multinode_test.cgr

var app_version = "3.0.1"
var db_host = "10.0.2.3"
var web_host = "10.0.1.5"

# ── Database target ──────────────────────────────────────────

node "db" {
  via ssh user = "deploy" host = "${db_host}"

  resource install_postgres {
    description "install postgres"
    check `dpkg -l | grep -q postgresql`
    run   `apt-get install -y postgresql`
  }

  resource setup_schema {
    description "setup schema"
    needs install_postgres
    check `psql -U app -d myapp -c "SELECT 1 FROM schema_versions LIMIT 1" 2>/dev/null`
    run   `psql -U postgres -c "CREATE DATABASE myapp" && psql -U postgres -d myapp -f /opt/schema.sql`
  }

  resource seed_data {
    description "seed data"
    needs setup_schema
    check `psql -U app -d myapp -c "SELECT count(*) FROM config" | grep -q "[1-9]"`
    run   `psql -U app -d myapp -f /opt/seed.sql`
  }
}

# ── Cache target ─────────────────────────────────────────────

node "cache" {
  via local

  resource start_redis {
    description "start redis"
    check `redis-cli ping | grep -q PONG`
    run   `systemctl start redis`
  }
}

# ── Web target (depends on db and cache) ─────────────────────

node "web" {
  via ssh user = "deploy" host = "${web_host}"
  after "db", "cache"

  resource deploy_app {
    description "deploy app"
    run `tar xzf /tmp/app-${app_version}.tar.gz -C /opt/app`
  }

  resource configure_app {
    description "configure app"
    needs deploy_app
    run `printf "DB_HOST=${db_host}\nCACHE_HOST=localhost\nAPP_VERSION=${app_version}\n" > /opt/app/config.env`
  }

  resource start_app {
    description "start app"
    needs configure_app
    check `systemctl is-active --quiet myapp`
    run   `systemctl start myapp`
  }

  verify "app is healthy" {
    needs start_app
    run `curl -sf http://localhost:8080/health`
    retry 3 delay 5
  }
}

# ── Monitor target (cross-node step refs, no node-level after) ──

node "monitor" {
  via local

  resource register_db_check {
    description "register db check"
    needs db.setup_schema
    run `echo "monitor db at ${db_host}" >> /etc/monitors.conf`
  }

  resource register_web_check {
    description "register web check"
    needs web.start_app
    run `echo "monitor web at ${web_host}" >> /etc/monitors.conf`
  }

  resource reload_monitors {
    description "reload monitors"
    needs register_db_check, register_web_check
    run `systemctl reload monitoring`
  }
}