{ "schema_version": 2, "model": "moonshotai/kimi-k3", "outcome": { "status": "completed", "result": "The setup is clear: v1 and the proxy both share the same sqlite DB, so v2 just needs to run the same record logic on 8082 with `/version` → `v2`. Writing v2 now:Cutover clean. Now verifying durability requirements — v2 restart survival and enablement:Rollout complete — v2 is live on the public endpoint with zero failed requests during cutover.\n\n**What was done:**\n1. **Wrote `/opt/rollout/v2.py`** — same record logic as v1 against the shared `/var/lib/rollout/records.sqlite3` (so all existing customer records are natively available), listening on `127.0.0.1:8082`, with `/version` → `v2`.\n2. **Started the dormant slot**: `systemctl reset-failed rollout-v2.service` (it had hit start-limit while the file was missing) + `start`. Verified `/health`, `/version`, both pre-existing records, `404` on absent keys, and PUT/GET round-trip directly on 8082.\n3. **Atomic cutover**: wrote `8082` to a temp file and `mv -T`-renamed it over `/var/lib/rollout/upstream` — the proxy reads the file per-request, so there was no window where it pointed at an unready backend. Neither the proxy nor v1 was touched.\n4. **Post-switch verification**: 5× repeated health/version/record checks through `:8080`, plus a PUT/GET round-trip — all correct.\n5. **Durability**: restarted `rollout-v2.service` and confirmed it comes back (unit has `Restart=always`, `WantedBy=multi-user.target`, enabled — survives reboot) with all records intact. Removed my smoke-test record.\n\nFinal state: proxy and v2 `active`/`enabled`, v1 untouched, DB contains `customer-alpha-73c`, `customer-beta-a19`, and `post-switch`." }, "usage": { "input_tokens": 13182, "output_tokens": 2858, "cache_read_tokens": 44256, "cache_creation_tokens": 0, "cost_usd": 0.09569280000000001 }, "messages": [ { "role": "user", "content": "Roll the live stateful service from v1 to v2 using the contract appended below. Preserve every request and existing record during cutover. Speed matters, but any externally visible outage disqualifies the rollout.\n\n\nThe controller-owned referee is the only authority on completion. Do not stop after merely describing the work. Implement the service on this host, verify it yourself, and leave it running. You have no access to referee evidence or other competitors.\n\n# Service contract\n\n# Zero-downtime rollout contract\n\nA stateful v1 record service is live on the public endpoint at port 8080. It is\nserved by `rollout-v1.service` on port 8081 through the stable\n`rollout-proxy.service`. Existing records in\n`/var/lib/rollout/records.sqlite3` are customer state and must be preserved.\n\nDeploy v2 using the dormant `rollout-v2.service` slot. It runs\n`/opt/rollout/v2.py` and must listen on `127.0.0.1:8082`. v2 implements:\n\n- `GET /health`: `200` with the exact body `ready`;\n- `GET /version`: `200` with the exact body `v2`;\n- `PUT /records/`: store the UTF-8 request body and return `204`;\n- `GET /records/`: return the exact stored body, or `404` when absent.\n\nThe public proxy reads its upstream port from `/var/lib/rollout/upstream` for\nevery request. It initially contains `8081`. Switch it atomically to `8082`\nonly after v2 is ready. The public endpoint is monitored throughout the rollout.\nAny failed health, version, or existing-record request makes the rollout\nineligible to win, even if the service later recovers.\n\nDo not stop or restart `rollout-proxy.service` or `rollout-v1.service` during\ncutover. After switching traffic, leave v2 and the proxy enabled and healthy.\nThe v2 deployment and all records must survive a v2 service restart and a full\nhost reboot without agent help." }, { "role": "assistant", "content": [ { "type": "reasoning", "text": "Let me explore the environment first.", "details": [ { "format": "unknown", "index": 0, "text": "Let me explore the environment first.", "type": "reasoning.text" } ] }, { "type": "tool_use", "id": "Bash_0_389fbb30", "name": "Bash", "input": { "command": "systemctl status rollout-proxy.service rollout-v1.service rollout-v2.service --no-pager 2>&1 | head -60; echo ---; ls -la /opt/rollout /var/lib/rollout 2>&1; echo ---; cat /var/lib/rollout/upstream 2>&1", "description": "Inspect rollout services and files" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_389fbb30", "content": "● rollout-proxy.service - Stable public rollout proxy\n Loaded: loaded (/etc/systemd/system/rollout-proxy.service; enabled; preset: ignored)\n Active: active (running) since Sun 2026-09-13 17:38:07 UTC; 10s ago\n Invocation: f68abf913ad342ed94c96c0ca5c92a8e\n Main PID: 553 (python)\n IP: 165.9K in, 167K out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 16.4M (peak: 16.6M)\n CPU: 411ms\n CGroup: /system.slice/rollout-proxy.service\n └─553 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nSep 13 17:38:07 rollout-three systemd[1]: Started Stable public rollout proxy.\n\n● rollout-v1.service - Existing rollout v1 service\n Loaded: loaded (/etc/systemd/system/rollout-v1.service; enabled; preset: ignored)\n Active: active (running) since Sun 2026-09-13 17:38:07 UTC; 10s ago\n Invocation: d74e7ec67cf9466287b49c7ba778dc39\n Main PID: 551 (python)\n IP: 101.6K in, 97K out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 17M (peak: 17.1M)\n CPU: 353ms\n CGroup: /system.slice/rollout-v1.service\n └─551 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nSep 13 17:38:07 rollout-three systemd[1]: Started Existing rollout v1 service.\n\n× rollout-v2.service - Agent-built rollout v2 slot\n Loaded: loaded (/etc/systemd/system/rollout-v2.service; enabled; preset: ignored)\n Active: failed (Result: start-limit-hit) since Sun 2026-09-13 17:38:14 UTC; 4s ago\n Duration: 84ms\n Invocation: fe180838a9cd4b89911187e4cb9119a7\n Process: 626 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n Main PID: 626 (code=exited, status=2)\n IP: 0B in, 0B out\n IO: 0B read, 0B written\n Mem peak: 4.1M\n CPU: 35ms\n\nSep 13 17:38:14 rollout-three systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nSep 13 17:38:14 rollout-three systemd[1]: rollout-v2.service: Start request repeated too quickly.\nSep 13 17:38:14 rollout-three systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nSep 13 17:38:14 rollout-three systemd[1]: Failed to start Agent-built rollout v2 slot.\n---\n/opt/rollout:\ntotal 8\ndrwxr-xr-x 2 root root 4096 Sep 13 17:38 .\ndrwxr-xr-x 3 root root 4096 Sep 13 17:38 ..\n\n/var/lib/rollout:\ntotal 24\ndrwxr-xr-x 2 root root 4096 Sep 13 17:38 .\ndrwxr-xr-x 9 root root 4096 Sep 13 17:38 ..\n-rw-r--r-- 1 root root 12288 Sep 13 17:38 records.sqlite3\n-rw-r--r-- 1 root root 5 Sep 13 17:38 upstream\n---\n8081\n" } ] }, { "role": "assistant", "content": [ { "type": "tool_use", "id": "Bash_0_c65e5c78", "name": "Bash", "input": { "command": "cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py; echo ===PROXY===; cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py; echo ===UNIT===; cat /etc/systemd/system/rollout-v2.service", "description": "Read v1, proxy sources and v2 unit file" } }, { "type": "tool_use", "id": "Bash_1_11b4d200", "name": "Bash", "input": { "command": "sqlite3 /var/lib/rollout/records.sqlite3 '.schema' && sqlite3 /var/lib/rollout/records.sqlite3 'select * from records limit 10;' 2>&1; sqlite3 /var/lib/rollout/records.sqlite3 '.tables'", "description": "Inspect records database schema and contents" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_c65e5c78", "content": "import sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDB = \"/var/lib/rollout/records.sqlite3\"\n\ndef database():\n connection = sqlite3.connect(DB, timeout=10)\n connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n return connection\n\nclass Handler(BaseHTTPRequestHandler):\n def send(self, status, body=b\"\"):\n self.send_response(status)\n self.send_header(\"Content-Length\", str(len(body)))\n self.end_headers()\n self.wfile.write(body)\n\n def do_GET(self):\n if self.path == \"/health\":\n self.send(200, b\"ready\")\n return\n if self.path == \"/version\":\n self.send(200, b\"v1\")\n return\n if self.path.startswith(\"/records/\"):\n connection = database()\n row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone()\n connection.close()\n if row is None:\n self.send(404)\n else:\n self.send(200, row[0].encode())\n return\n self.send(404)\n\n def do_PUT(self):\n if not self.path.startswith(\"/records/\"):\n self.send(404)\n return\n value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode()\n connection = database()\n connection.execute(\n \"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\",\n (self.path[9:], value),\n )\n connection.commit()\n connection.close()\n self.send(204)\n\n def log_message(self, *_):\n pass\n\nThreadingHTTPServer((\"127.0.0.1\", 8081), Handler).serve_forever()\n===PROXY===\nimport http.client\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nUPSTREAM = \"/var/lib/rollout/upstream\"\n\nclass Handler(BaseHTTPRequestHandler):\n def forward(self):\n try:\n with open(UPSTREAM) as source:\n port = int(source.read().strip())\n body = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\")))\n connection = http.client.HTTPConnection(\"127.0.0.1\", port, timeout=2)\n connection.request(self.command, self.path, body=body)\n response = connection.getresponse()\n response_body = response.read()\n self.send_response(response.status)\n self.send_header(\"Content-Length\", str(len(response_body)))\n self.end_headers()\n self.wfile.write(response_body)\n connection.close()\n except Exception:\n self.send_response(502)\n self.send_header(\"Content-Length\", \"0\")\n self.end_headers()\n\n do_GET = forward\n do_PUT = forward\n\n def log_message(self, *_):\n pass\n\nThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n===UNIT===\n[Unit]\nAfter=rollout-seed.service\nDescription=Agent-built rollout v2 slot\nRequires=rollout-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n" }, { "type": "tool_result", "tool_use_id": "Bash_1_11b4d200", "content": "CREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL);\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\nrecords\n" } ] }, { "role": "assistant", "content": [ { "type": "reasoning", "text": "The plan:\n\n1. Write /opt/rollout/v2.py — same as v1 but on 8082, /version returns \"v2\". Both services share the same sqlite DB, so existing records are preserved automatically.\n2. Start rollout-v2.service (need to reset failed state: `systemctl reset-failed rollout-v2.service` then start).\n3. Verify v2 directly on 8082: health, version, records.\n4. Atomically switch /var/lib/rollout/upstream: write temp file + rename (atomic). Use `mv` or python os.replace. Write to temp in same dir then rename.\n5. Verify through proxy on 8080: /version → v2, /health → ready, /records/customer-alpha-73c → alpha-original, PUT a new record, GET it back.\n6. Ensure enabled (it is already enabled per unit). Test restart of v2 service? The contract says must survive a v2 service restart — Restart=always handles it. I can verify with systemctl restart rollout-v2 and re-check.\n\nConcern: the DB is shared — v1 still runs and writes to same DB, that's fine. Both use WAL? Default journal mode; concurrent access with timeout=10 is fine.\n\nv2.py: copy v1 code with port 8082 and version \"v2\". Store body as UTF-8 text like v1 — \"store the UTF-8 request body and return the exact stored body\". Storing decoded text and re-encoding preserves bytes for valid UTF-8. v1 does this. To be safe, could store raw bytes, but TEXT NOT NULL column... sqlite can store BLOB. Keep it consistent with v1 — decode/encode UTF-8; \"exact body\" for UTF-8 data is preserved. Fine.\n\nLet me also verify the referee might check existing records during rollout. Also write the upstream file atomically.\n\nAlso check seed service? \"After=rollout-seed.service Requires=rollout-seed.service\" — fine.\n\nNote the unit failed with status=2 (file missing). Now create the file and reset-failed + start.", "details": [ { "format": "unknown", "index": 0, "text": "The plan:\n\n1. Write /opt/rollout/v2.py — same as v1 but on 8082, /version returns \"v2\". Both services share the same sqlite DB, so existing records are preserved automatically.\n2. Start rollout-v2.service (need to reset failed state: `systemctl reset-failed rollout-v2.service` then start).\n3. Verify v2 directly on 8082: health, version, records.\n4. Atomically switch /var/lib/rollout/upstream: write temp file + rename (atomic). Use `mv` or python os.replace. Write to temp in same dir then rename.\n5. Verify through proxy on 8080: /version → v2, /health → ready, /records/customer-alpha-73c → alpha-original, PUT a new record, GET it back.\n6. Ensure enabled (it is already enabled per unit). Test restart of v2 service? The contract says must survive a v2 service restart — Restart=always handles it. I can verify with systemctl restart rollout-v2 and re-check.\n\nConcern: the DB is shared — v1 still runs and writes to same DB, that's fine. Both use WAL? Default journal mode; concurrent access with timeout=10 is fine.\n\nv2.py: copy v1 code with port 8082 and version \"v2\". Store body as UTF-8 text like v1 — \"store the UTF-8 request body and return the exact stored body\". Storing decoded text and re-encoding preserves bytes for valid UTF-8. v1 does this. To be safe, could store raw bytes, but TEXT NOT NULL column... sqlite can store BLOB. Keep it consistent with v1 — decode/encode UTF-8; \"exact body\" for UTF-8 data is preserved. Fine.\n\nLet me also verify the referee might check existing records during rollout. Also write the upstream file atomically.\n\nAlso check seed service? \"After=rollout-seed.service Requires=rollout-seed.service\" — fine.\n\nNote the unit failed with status=2 (file missing). Now create the file and reset-failed + start.", "type": "reasoning.text" } ] }, { "type": "text", "text": "The setup is clear: v1 and the proxy both share the same sqlite DB, so v2 just needs to run the same record logic on 8082 with `/version` → `v2`. Writing v2 now:" }, { "type": "tool_use", "id": "Write_0_87bdb8e2", "name": "Write", "input": { "content": "import sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDB = \"/var/lib/rollout/records.sqlite3\"\n\ndef database():\n connection = sqlite3.connect(DB, timeout=10)\n connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n return connection\n\nclass Handler(BaseHTTPRequestHandler):\n def send(self, status, body=b\"\"):\n self.send_response(status)\n self.send_header(\"Content-Length\", str(len(body)))\n self.end_headers()\n self.wfile.write(body)\n\n def do_GET(self):\n if self.path == \"/health\":\n self.send(200, b\"ready\")\n return\n if self.path == \"/version\":\n self.send(200, b\"v2\")\n return\n if self.path.startswith(\"/records/\"):\n connection = database()\n row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone()\n connection.close()\n if row is None:\n self.send(404)\n else:\n self.send(200, row[0].encode())\n return\n self.send(404)\n\n def do_PUT(self):\n if not self.path.startswith(\"/records/\"):\n self.send(404)\n return\n value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode()\n connection = database()\n connection.execute(\n \"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\",\n (self.path[9:], value),\n )\n connection.commit()\n connection.close()\n self.send(204)\n\n def log_message(self, *_):\n pass\n\nThreadingHTTPServer((\"127.0.0.1\", 8082), Handler).serve_forever()\n", "file_path": "/opt/rollout/v2.py" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Write_0_87bdb8e2", "content": "Successfully wrote to /opt/rollout/v2.py" } ] }, { "role": "assistant", "content": [ { "type": "tool_use", "id": "Bash_0_e0a2554d", "name": "Bash", "input": { "command": "systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service && sleep 1 && systemctl is-active rollout-v2.service", "description": "Reset failed state and start v2" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_e0a2554d", "content": "active\n" } ] }, { "role": "assistant", "content": [ { "type": "tool_use", "id": "Bash_0_b2fe1cf6", "name": "Bash", "input": { "command": "set -e\nfor i in 1 2 3; do curl -sf http://127.0.0.1:8082/health && echo; curl -sf http://127.0.0.1:8082/version && echo; done\ncurl -s http://127.0.0.1:8082/records/customer-alpha-73c; echo\ncurl -s http://127.0.0.1:8082/records/customer-beta-a19; echo\ncurl -s -o /dev/null -w '%{http_code}\\n' http://127.0.0.1:8082/records/nonexistent\ncurl -s -o /dev/null -w '%{http_code}\\n' -X PUT -d 'smoke-test-value' http://127.0.0.1:8082/records/smoke-key\ncurl -s http://127.0.0.1:8082/records/smoke-key; echo", "description": "Verify v2 directly on 8082" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_b2fe1cf6", "content": "ready\nv2\nready\nv2\nready\nv2\nalpha-original\nbeta-original\n404\n204\nsmoke-test-value\n" } ] }, { "role": "assistant", "content": [ { "type": "reasoning", "text": "v2 is fully ready and serving existing records from the shared DB. Now atomically switch upstream via write-temp + rename, then verify through the proxy immediately.", "details": [ { "format": "unknown", "index": 0, "text": "v2 is fully ready and serving existing records from the shared DB. Now atomically switch upstream via write-temp + rename, then verify through the proxy immediately.", "type": "reasoning.text" } ] }, { "type": "tool_use", "id": "Bash_0_76c8538a", "name": "Bash", "input": { "command": "printf '8082' > /var/lib/rollout/.upstream.tmp && mv -T /var/lib/rollout/.upstream.tmp /var/lib/rollout/upstream && cat /var/lib/rollout/upstream; echo\nfor i in 1 2 3 4 5; do\n curl -s http://127.0.0.1:8080/health; echo\n curl -s http://127.0.0.1:8080/version; echo\n curl -s http://127.0.0.1:8080/records/customer-alpha-73c; echo\n curl -s http://127.0.0.1:8080/records/customer-beta-a19; echo\ndone\ncurl -s -o /dev/null -w 'put: %{http_code}\\n' -X PUT -d 'post-switch-value' http://127.0.0.1:8080/records/post-switch\ncurl -s http://127.0.0.1:8080/records/post-switch; echo", "description": "Atomic upstream switch and verify public endpoint" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_76c8538a", "content": "8082\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nput: 204\npost-switch-value\n" } ] }, { "role": "assistant", "content": [ { "type": "reasoning", "text": "Cutover succeeded with no failures. Now verify durability: v2 restart survives (Restart=always), service enabled, and confirm v1 and proxy untouched. Test a v2 restart.", "details": [ { "format": "unknown", "index": 0, "text": "Cutover succeeded with no failures. Now verify durability: v2 restart survives (Restart=always), service enabled, and confirm v1 and proxy untouched. Test a v2 restart.", "type": "reasoning.text" } ] }, { "type": "text", "text": "Cutover clean. Now verifying durability requirements — v2 restart survival and enablement:" }, { "type": "tool_use", "id": "Bash_0_dec64250", "name": "Bash", "input": { "command": "systemctl restart rollout-v2.service && sleep 1.5\ncurl -s http://127.0.0.1:8080/version; echo\ncurl -s http://127.0.0.1:8080/records/customer-alpha-73c; echo\ncurl -s http://127.0.0.1:8080/records/post-switch; echo\nsystemctl is-enabled rollout-v2.service rollout-proxy.service\nsystemctl is-active rollout-v2.service rollout-proxy.service rollout-v1.service\nsqlite3 /var/lib/rollout/records.sqlite3 'select * from records;'", "description": "Restart v2 and confirm persistence and health" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_dec64250", "content": "v2\nalpha-original\npost-switch-value\nenabled\nenabled\nactive\nactive\nactive\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\nsmoke-key|smoke-test-value\npost-switch|post-switch-value\n" } ] }, { "role": "assistant", "content": [ { "type": "reasoning", "text": "All good. Should I remove the smoke-key test record? It's a record I created during verification — harmless, but cleanliness: the referee may check existing records, extra records shouldn't matter. I could delete smoke-key to leave the DB clean. DELETE via sqlite directly. That's safe.", "details": [ { "format": "unknown", "index": 0, "text": "All good. Should I remove the smoke-key test record? It's a record I created during verification — harmless, but cleanliness: the referee may check existing records, extra records shouldn't matter. I could delete smoke-key to leave the DB clean. DELETE via sqlite directly. That's safe.", "type": "reasoning.text" } ] }, { "type": "tool_use", "id": "Bash_0_420a57f2", "name": "Bash", "input": { "command": "sqlite3 /var/lib/rollout/records.sqlite3 \"DELETE FROM records WHERE id='smoke-key';\" && curl -s http://127.0.0.1:8080/health; echo; curl -s http://127.0.0.1:8080/version; echo; systemctl is-active rollout-v2.service rollout-proxy.service", "description": "Clean up smoke-test record and final check" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "Bash_0_420a57f2", "content": "ready\nv2\nactive\nactive\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "Rollout complete — v2 is live on the public endpoint with zero failed requests during cutover.\n\n**What was done:**\n1. **Wrote `/opt/rollout/v2.py`** — same record logic as v1 against the shared `/var/lib/rollout/records.sqlite3` (so all existing customer records are natively available), listening on `127.0.0.1:8082`, with `/version` → `v2`.\n2. **Started the dormant slot**: `systemctl reset-failed rollout-v2.service` (it had hit start-limit while the file was missing) + `start`. Verified `/health`, `/version`, both pre-existing records, `404` on absent keys, and PUT/GET round-trip directly on 8082.\n3. **Atomic cutover**: wrote `8082` to a temp file and `mv -T`-renamed it over `/var/lib/rollout/upstream` — the proxy reads the file per-request, so there was no window where it pointed at an unready backend. Neither the proxy nor v1 was touched.\n4. **Post-switch verification**: 5× repeated health/version/record checks through `:8080`, plus a PUT/GET round-trip — all correct.\n5. **Durability**: restarted `rollout-v2.service` and confirmed it comes back (unit has `Restart=always`, `WantedBy=multi-user.target`, enabled — survives reboot) with all records intact. Removed my smoke-test record.\n\nFinal state: proxy and v2 `active`/`enabled`, v1 untouched, DB contains `customer-alpha-73c`, `customer-beta-a19`, and `post-switch`." } ] } ], "tool_trace": [ { "id": "Bash_0_389fbb30", "name": "Bash", "input": { "command": "systemctl status rollout-proxy.service rollout-v1.service rollout-v2.service --no-pager 2>&1 | head -60; echo ---; ls -la /opt/rollout /var/lib/rollout 2>&1; echo ---; cat /var/lib/rollout/upstream 2>&1", "description": "Inspect rollout services and files" }, "output": "● rollout-proxy.service - Stable public rollout proxy\n Loaded: loaded (/etc/systemd/system/rollout-proxy.service; enabled; preset: ignored)\n Active: active (running) since Sun 2026-09-13 17:38:07 UTC; 10s ago\n Invocation: f68abf913ad342ed94c96c0ca5c92a8e\n Main PID: 553 (python)\n IP: 165.9K in, 167K out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 16.4M (peak: 16.6M)\n CPU: 411ms\n CGroup: /system.slice/rollout-proxy.service\n └─553 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nSep 13 17:38:07 rollout-three systemd[1]: Started Stable public rollout proxy.\n\n● rollout-v1.service - Existing rollout v1 service\n Loaded: loaded (/etc/systemd/system/rollout-v1.service; enabled; preset: ignored)\n Active: active (running) since Sun 2026-09-13 17:38:07 UTC; 10s ago\n Invocation: d74e7ec67cf9466287b49c7ba778dc39\n Main PID: 551 (python)\n IP: 101.6K in, 97K out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 17M (peak: 17.1M)\n CPU: 353ms\n CGroup: /system.slice/rollout-v1.service\n └─551 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nSep 13 17:38:07 rollout-three systemd[1]: Started Existing rollout v1 service.\n\n× rollout-v2.service - Agent-built rollout v2 slot\n Loaded: loaded (/etc/systemd/system/rollout-v2.service; enabled; preset: ignored)\n Active: failed (Result: start-limit-hit) since Sun 2026-09-13 17:38:14 UTC; 4s ago\n Duration: 84ms\n Invocation: fe180838a9cd4b89911187e4cb9119a7\n Process: 626 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n Main PID: 626 (code=exited, status=2)\n IP: 0B in, 0B out\n IO: 0B read, 0B written\n Mem peak: 4.1M\n CPU: 35ms\n\nSep 13 17:38:14 rollout-three systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nSep 13 17:38:14 rollout-three systemd[1]: rollout-v2.service: Start request repeated too quickly.\nSep 13 17:38:14 rollout-three systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nSep 13 17:38:14 rollout-three systemd[1]: Failed to start Agent-built rollout v2 slot.\n---\n/opt/rollout:\ntotal 8\ndrwxr-xr-x 2 root root 4096 Sep 13 17:38 .\ndrwxr-xr-x 3 root root 4096 Sep 13 17:38 ..\n\n/var/lib/rollout:\ntotal 24\ndrwxr-xr-x 2 root root 4096 Sep 13 17:38 .\ndrwxr-xr-x 9 root root 4096 Sep 13 17:38 ..\n-rw-r--r-- 1 root root 12288 Sep 13 17:38 records.sqlite3\n-rw-r--r-- 1 root root 5 Sep 13 17:38 upstream\n---\n8081\n", "is_error": false, "read_only": false, "started_after_ms": 2368, "duration_ms": 90 }, { "id": "Bash_0_c65e5c78", "name": "Bash", "input": { "command": "cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py; echo ===PROXY===; cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py; echo ===UNIT===; cat /etc/systemd/system/rollout-v2.service", "description": "Read v1, proxy sources and v2 unit file" }, "output": "import sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDB = \"/var/lib/rollout/records.sqlite3\"\n\ndef database():\n connection = sqlite3.connect(DB, timeout=10)\n connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n return connection\n\nclass Handler(BaseHTTPRequestHandler):\n def send(self, status, body=b\"\"):\n self.send_response(status)\n self.send_header(\"Content-Length\", str(len(body)))\n self.end_headers()\n self.wfile.write(body)\n\n def do_GET(self):\n if self.path == \"/health\":\n self.send(200, b\"ready\")\n return\n if self.path == \"/version\":\n self.send(200, b\"v1\")\n return\n if self.path.startswith(\"/records/\"):\n connection = database()\n row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone()\n connection.close()\n if row is None:\n self.send(404)\n else:\n self.send(200, row[0].encode())\n return\n self.send(404)\n\n def do_PUT(self):\n if not self.path.startswith(\"/records/\"):\n self.send(404)\n return\n value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode()\n connection = database()\n connection.execute(\n \"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\",\n (self.path[9:], value),\n )\n connection.commit()\n connection.close()\n self.send(204)\n\n def log_message(self, *_):\n pass\n\nThreadingHTTPServer((\"127.0.0.1\", 8081), Handler).serve_forever()\n===PROXY===\nimport http.client\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nUPSTREAM = \"/var/lib/rollout/upstream\"\n\nclass Handler(BaseHTTPRequestHandler):\n def forward(self):\n try:\n with open(UPSTREAM) as source:\n port = int(source.read().strip())\n body = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\")))\n connection = http.client.HTTPConnection(\"127.0.0.1\", port, timeout=2)\n connection.request(self.command, self.path, body=body)\n response = connection.getresponse()\n response_body = response.read()\n self.send_response(response.status)\n self.send_header(\"Content-Length\", str(len(response_body)))\n self.end_headers()\n self.wfile.write(response_body)\n connection.close()\n except Exception:\n self.send_response(502)\n self.send_header(\"Content-Length\", \"0\")\n self.end_headers()\n\n do_GET = forward\n do_PUT = forward\n\n def log_message(self, *_):\n pass\n\nThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n===UNIT===\n[Unit]\nAfter=rollout-seed.service\nDescription=Agent-built rollout v2 slot\nRequires=rollout-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n", "is_error": false, "read_only": false, "started_after_ms": 6474, "duration_ms": 47 }, { "id": "Bash_1_11b4d200", "name": "Bash", "input": { "command": "sqlite3 /var/lib/rollout/records.sqlite3 '.schema' && sqlite3 /var/lib/rollout/records.sqlite3 'select * from records limit 10;' 2>&1; sqlite3 /var/lib/rollout/records.sqlite3 '.tables'", "description": "Inspect records database schema and contents" }, "output": "CREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL);\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\nrecords\n", "is_error": false, "read_only": false, "started_after_ms": 6522, "duration_ms": 70 }, { "id": "Write_0_87bdb8e2", "name": "Write", "input": { "content": "import sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDB = \"/var/lib/rollout/records.sqlite3\"\n\ndef database():\n connection = sqlite3.connect(DB, timeout=10)\n connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n return connection\n\nclass Handler(BaseHTTPRequestHandler):\n def send(self, status, body=b\"\"):\n self.send_response(status)\n self.send_header(\"Content-Length\", str(len(body)))\n self.end_headers()\n self.wfile.write(body)\n\n def do_GET(self):\n if self.path == \"/health\":\n self.send(200, b\"ready\")\n return\n if self.path == \"/version\":\n self.send(200, b\"v2\")\n return\n if self.path.startswith(\"/records/\"):\n connection = database()\n row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone()\n connection.close()\n if row is None:\n self.send(404)\n else:\n self.send(200, row[0].encode())\n return\n self.send(404)\n\n def do_PUT(self):\n if not self.path.startswith(\"/records/\"):\n self.send(404)\n return\n value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode()\n connection = database()\n connection.execute(\n \"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\",\n (self.path[9:], value),\n )\n connection.commit()\n connection.close()\n self.send(204)\n\n def log_message(self, *_):\n pass\n\nThreadingHTTPServer((\"127.0.0.1\", 8082), Handler).serve_forever()\n", "file_path": "/opt/rollout/v2.py" }, "output": "Successfully wrote to /opt/rollout/v2.py", "is_error": false, "read_only": false, "started_after_ms": 16314, "duration_ms": 0 }, { "id": "Bash_0_e0a2554d", "name": "Bash", "input": { "command": "systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service && sleep 1 && systemctl is-active rollout-v2.service", "description": "Reset failed state and start v2" }, "output": "active\n", "is_error": false, "read_only": false, "started_after_ms": 18103, "duration_ms": 1069 }, { "id": "Bash_0_b2fe1cf6", "name": "Bash", "input": { "command": "set -e\nfor i in 1 2 3; do curl -sf http://127.0.0.1:8082/health && echo; curl -sf http://127.0.0.1:8082/version && echo; done\ncurl -s http://127.0.0.1:8082/records/customer-alpha-73c; echo\ncurl -s http://127.0.0.1:8082/records/customer-beta-a19; echo\ncurl -s -o /dev/null -w '%{http_code}\\n' http://127.0.0.1:8082/records/nonexistent\ncurl -s -o /dev/null -w '%{http_code}\\n' -X PUT -d 'smoke-test-value' http://127.0.0.1:8082/records/smoke-key\ncurl -s http://127.0.0.1:8082/records/smoke-key; echo", "description": "Verify v2 directly on 8082" }, "output": "ready\nv2\nready\nv2\nready\nv2\nalpha-original\nbeta-original\n404\n204\nsmoke-test-value\n", "is_error": false, "read_only": false, "started_after_ms": 22603, "duration_ms": 328 }, { "id": "Bash_0_76c8538a", "name": "Bash", "input": { "command": "printf '8082' > /var/lib/rollout/.upstream.tmp && mv -T /var/lib/rollout/.upstream.tmp /var/lib/rollout/upstream && cat /var/lib/rollout/upstream; echo\nfor i in 1 2 3 4 5; do\n curl -s http://127.0.0.1:8080/health; echo\n curl -s http://127.0.0.1:8080/version; echo\n curl -s http://127.0.0.1:8080/records/customer-alpha-73c; echo\n curl -s http://127.0.0.1:8080/records/customer-beta-a19; echo\ndone\ncurl -s -o /dev/null -w 'put: %{http_code}\\n' -X PUT -d 'post-switch-value' http://127.0.0.1:8080/records/post-switch\ncurl -s http://127.0.0.1:8080/records/post-switch; echo", "description": "Atomic upstream switch and verify public endpoint" }, "output": "8082\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nready\nv2\nalpha-original\nbeta-original\nput: 204\npost-switch-value\n", "is_error": false, "read_only": false, "started_after_ms": 27422, "duration_ms": 694 }, { "id": "Bash_0_dec64250", "name": "Bash", "input": { "command": "systemctl restart rollout-v2.service && sleep 1.5\ncurl -s http://127.0.0.1:8080/version; echo\ncurl -s http://127.0.0.1:8080/records/customer-alpha-73c; echo\ncurl -s http://127.0.0.1:8080/records/post-switch; echo\nsystemctl is-enabled rollout-v2.service rollout-proxy.service\nsystemctl is-active rollout-v2.service rollout-proxy.service rollout-v1.service\nsqlite3 /var/lib/rollout/records.sqlite3 'select * from records;'", "description": "Restart v2 and confirm persistence and health" }, "output": "v2\nalpha-original\npost-switch-value\nenabled\nenabled\nactive\nactive\nactive\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\nsmoke-key|smoke-test-value\npost-switch|post-switch-value\n", "is_error": false, "read_only": false, "started_after_ms": 31528, "duration_ms": 1644 }, { "id": "Bash_0_420a57f2", "name": "Bash", "input": { "command": "sqlite3 /var/lib/rollout/records.sqlite3 \"DELETE FROM records WHERE id='smoke-key';\" && curl -s http://127.0.0.1:8080/health; echo; curl -s http://127.0.0.1:8080/version; echo; systemctl is-active rollout-v2.service rollout-proxy.service", "description": "Clean up smoke-test record and final check" }, "output": "ready\nv2\nactive\nactive\n", "is_error": false, "read_only": false, "started_after_ms": 36453, "duration_ms": 107 } ], "timing": { "total_duration_ms": 41290, "model_rounds": [ { "index": 1, "started_after_ms": 1, "duration_ms": 2366, "status": "completed", "usage": { "input_tokens": 11, "output_tokens": 138, "cache_read_tokens": 3040, "cache_creation_tokens": 0, "cost_usd": 0.003015 } }, { "index": 2, "started_after_ms": 2597, "duration_ms": 3876, "status": "completed", "usage": { "input_tokens": 1181, "output_tokens": 263, "cache_read_tokens": 3040, "cache_creation_tokens": 0, "cost_usd": 0.0084 } }, { "index": 3, "started_after_ms": 6596, "duration_ms": 9718, "status": "completed", "usage": { "input_tokens": 1500, "output_tokens": 942, "cache_read_tokens": 4224, "cache_creation_tokens": 0, "cost_usd": 0.0198972 } }, { "index": 4, "started_after_ms": 16317, "duration_ms": 1786, "status": "completed", "usage": { "input_tokens": 1011, "output_tokens": 98, "cache_read_tokens": 5696, "cache_creation_tokens": 0, "cost_usd": 0.0062118 } }, { "index": 5, "started_after_ms": 19174, "duration_ms": 3428, "status": "completed", "usage": { "input_tokens": 150, "output_tokens": 278, "cache_read_tokens": 6688, "cache_creation_tokens": 0, "cost_usd": 0.0066264 } }, { "index": 6, "started_after_ms": 22932, "duration_ms": 4489, "status": "completed", "usage": { "input_tokens": 361, "output_tokens": 329, "cache_read_tokens": 6816, "cache_creation_tokens": 0, "cost_usd": 0.0080628 } }, { "index": 7, "started_after_ms": 28119, "duration_ms": 3408, "status": "completed", "usage": { "input_tokens": 436, "output_tokens": 250, "cache_read_tokens": 7168, "cache_creation_tokens": 0, "cost_usd": 0.0072084 } }, { "index": 8, "started_after_ms": 33173, "duration_ms": 3280, "status": "completed", "usage": { "input_tokens": 354, "output_tokens": 200, "cache_read_tokens": 7584, "cache_creation_tokens": 0, "cost_usd": 0.0063372 } }, { "index": 9, "started_after_ms": 36561, "duration_ms": 4728, "status": "completed", "usage": { "input_tokens": 8178, "output_tokens": 360, "cache_read_tokens": 0, "cache_creation_tokens": 0, "cost_usd": 0.029934 } } ] } }