mirror of
https://github.com/Sea-Haven-Industries/syslog-server.git
synced 2026-09-30 13:33:16 +00:00
67 lines
3.1 KiB
Markdown
67 lines
3.1 KiB
Markdown
# syslog-server
|
||
|
||
|
||
|
||
|
||
|
||
CDK stack for the **syslog-server** EC2 collector: receives remote syslog
|
||
(UDP/TCP 514) from the office UniFi fleet over its Elastic IP and ships it to
|
||
the `unifi-syslog` CloudWatch Logs group via the CloudWatch agent.
|
||
|
||
Brought under IaC for **INFRA-12** (AWS audit L-6). Previously a console/CLI
|
||
instance with no drift detection.
|
||
|
||
## Architecture
|
||
|
||
```
|
||
office UniFi devices ──syslog/514──▶ EIP 184.72.154.32 ──▶ EC2 (rsyslog)
|
||
│
|
||
/var/log/remote/<host>/*.log
|
||
│
|
||
CloudWatch agent ──▶ unifi-syslog (90d)
|
||
│
|
||
Syslog-NoIncomingLogs alarm ──▶ site-alerts
|
||
```
|
||
|
||
| Resource | Value |
|
||
|---|---|
|
||
| Instance | `syslog-server`, t4g.nano, Amazon Linux 2023 (arm64), 30 GiB encrypted gp3 |
|
||
| Subnet | `subnet-0eea820effe1b3ae5` (public, us-east-1a, `vpc-0d3d4b67bd0cf8a68`) |
|
||
| Elastic IP | `184.72.154.32` (`eipalloc-006bdefc9802f3285`) — **unmanaged**, re-associated by ID |
|
||
| Security group | `syslog-server` — 514 tcp/udp + 22 from office IPs + VPC/VPN CIDRs; 2055/2056 udp reserved (netflow/sflow) |
|
||
| IAM role | `syslog-server-role` — `AmazonSSMManagedInstanceCore` + `CloudWatchAgentServerPolicy` |
|
||
| Log group | `unifi-syslog` (90-day retention) — created/retained by the CW agent, **not** a CFN resource (holds history; see stack comment) |
|
||
| Alarm | `Syslog-NoIncomingLogs` — `IncomingLogEvents` Sum < 1 over 2×1-day, ALARM-only → `site-alerts` |
|
||
|
||
## Documentation
|
||
|
||
The canonical map of Sea Haven's AWS infrastructure lives in Confluence. This project's `syslog-server` stack is represented there as a Mermaid subgraph.
|
||
|
||
- **[AWS Architecture Map](https://seahaven.atlassian.net/wiki/spaces/IT/pages/1540098)** (Confluence, IT space, page 1540098)
|
||
|
||
## Access
|
||
|
||
SSM Session Manager (no key pair). SSH 22 is open from office/VPC for
|
||
break-glass only.
|
||
|
||
## Deploy
|
||
|
||
CI/CD via the org reusable workflows (`ci-typescript-cdk.yaml`,
|
||
`cd-cdk.yaml`); merges to `main` deploy through the `githubdeploy-syslog-server`
|
||
OIDC role. No Docker assets, so a local `cdk deploy` is also safe.
|
||
|
||
```
|
||
npm ci
|
||
npm run diff
|
||
npm run deploy
|
||
```
|
||
|
||
## Notes
|
||
|
||
- **EIP is unmanaged.** CloudFormation associates it but never releases it, so
|
||
the public forwarding target survives any instance replacement.
|
||
- **AMI is pinned in `cdk.context.json`** (`cachedInContext`). An AL2023 AMI
|
||
change forces instance replacement — refresh deliberately with
|
||
`cdk context --reset <ami key> && cdk synth`.
|
||
- To widen device coverage of the forwarded syslog feed, see **INFRA-11**
|
||
(UniFi controller remote-logging config).
|