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Read backup S3 prefix from SSM parameter at runtime

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Adds /forgejo/backup-s3-prefix SSM parameter (value: archive)
and updates the backup script to fetch it instead of hardcoding
the prefix. Eliminates the manual post-deploy sed step.
This commit is contained in:
Adam Moussa 2026-05-15 17:13:50 -04:00
parent 9d48c82d77
commit deaae36396
2 changed files with 13 additions and 11 deletions
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12
README.md
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@ -199,17 +199,9 @@ This deploys two stacks:
CI/CD is handled by GitHub Actions — PRs run CI, merges to `main` deploy via the reusable CDK workflow. CI/CD is handled by GitHub Actions — PRs run CI, merges to `main` deploy via the reusable CDK workflow.
## Post-deploy: update running instance backup path ## Post-deploy: store Slack webhook
After the first deploy with the 3-2-1 changes, the running instance's backup script still uses the old S3 path (without the `archive/` prefix). Update it via SSM: Store the Slack webhook URL for backup verification alerts:
```bash
INSTANCE_ID=$(aws cloudformation describe-stacks --stack-name forgejo --query 'Stacks[0].Outputs[?OutputKey==`InstanceId`].OutputValue' --output text)
aws ssm start-session --target "$INSTANCE_ID"
sudo sed -i 's|s3://forgejo-backups-328440206208/${TIMESTAMP}/|s3://forgejo-backups-328440206208/archive/${TIMESTAMP}/|' /usr/local/bin/forgejo-backup.sh
```
Also store the Slack webhook URL for backup verification alerts:
```bash ```bash
aws secretsmanager create-secret --name forgejo/slack-webhook \ aws secretsmanager create-secret --name forgejo/slack-webhook \

12
lib/forgejo-stack.ts
View file

@ -7,6 +7,7 @@ import * as elbv2 from "aws-cdk-lib/aws-elasticloadbalancingv2";
import * as elbv2_targets from "aws-cdk-lib/aws-elasticloadbalancingv2-targets"; import * as elbv2_targets from "aws-cdk-lib/aws-elasticloadbalancingv2-targets";
import * as route53 from "aws-cdk-lib/aws-route53"; import * as route53 from "aws-cdk-lib/aws-route53";
import * as route53Targets from "aws-cdk-lib/aws-route53-targets"; import * as route53Targets from "aws-cdk-lib/aws-route53-targets";
import * as ssm from "aws-cdk-lib/aws-ssm";
import * as dlm from "aws-cdk-lib/aws-dlm"; import * as dlm from "aws-cdk-lib/aws-dlm";
import { Construct } from "constructs"; import { Construct } from "constructs";
import { BackupVerification } from "./constructs/backup-verification"; import { BackupVerification } from "./constructs/backup-verification";
@ -84,6 +85,14 @@ export class ForgejoStack extends cdk.Stack {
backupBucket.grantReadWrite(role); backupBucket.grantReadWrite(role);
const backupS3Prefix = new ssm.StringParameter(this, "BackupS3Prefix", {
parameterName: "/forgejo/backup-s3-prefix",
description: "S3 key prefix for Forgejo backup dumps",
stringValue: "archive",
});
backupS3Prefix.grantRead(role);
const replicaBucketArn = "arn:aws:s3:::forgejo-backups-replica-328440206208"; const replicaBucketArn = "arn:aws:s3:::forgejo-backups-replica-328440206208";
const replicationRole = new iam.Role(this, "ReplicationRole", { const replicationRole = new iam.Role(this, "ReplicationRole", {
@ -239,11 +248,12 @@ export class ForgejoStack extends cdk.Stack {
"#!/bin/bash", "#!/bin/bash",
"set -euo pipefail", "set -euo pipefail",
"TIMESTAMP=$(date +%Y-%m-%d)", "TIMESTAMP=$(date +%Y-%m-%d)",
"S3_PREFIX=$(aws ssm get-parameter --name /forgejo/backup-s3-prefix --query Parameter.Value --output text --region us-east-1)",
"DUMP_DIR=$(mktemp -d)", "DUMP_DIR=$(mktemp -d)",
"chown forgejo:forgejo \"$DUMP_DIR\"", "chown forgejo:forgejo \"$DUMP_DIR\"",
"cd \"$DUMP_DIR\"", "cd \"$DUMP_DIR\"",
"sudo -u forgejo /usr/local/bin/forgejo dump --config /etc/forgejo/app.ini --type tar.gz --file \"$DUMP_DIR/forgejo-${TIMESTAMP}.tar.gz\"", "sudo -u forgejo /usr/local/bin/forgejo dump --config /etc/forgejo/app.ini --type tar.gz --file \"$DUMP_DIR/forgejo-${TIMESTAMP}.tar.gz\"",
"aws s3 cp \"$DUMP_DIR/forgejo-${TIMESTAMP}.tar.gz\" s3://forgejo-backups-328440206208/archive/${TIMESTAMP}/forgejo-${TIMESTAMP}.tar.gz", "aws s3 cp \"$DUMP_DIR/forgejo-${TIMESTAMP}.tar.gz\" s3://forgejo-backups-328440206208/${S3_PREFIX}/${TIMESTAMP}/forgejo-${TIMESTAMP}.tar.gz",
"rm -rf \"$DUMP_DIR\"", "rm -rf \"$DUMP_DIR\"",
"BAKEOF", "BAKEOF",
"chmod +x /usr/local/bin/forgejo-backup.sh", "chmod +x /usr/local/bin/forgejo-backup.sh",