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Adding Script for Migrating Existing Helm Releases from Default Backend to SQL Backend #1506

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Adding Script for Migrating Existing Helm Releases from Default Backend to SQL Backend #1506

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60 changes: 60 additions & 0 deletions content/en/docs/topics/advanced.md
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Expand Up @@ -222,3 +222,63 @@ with the following command:
```shell
kubectl get secret --all-namespaces -l "owner=helm"
```
The following Bash script will assist you in migrating all existing Helm releases to PostgreSQL. Please use it at your own risk, and ensure that the releases are properly migrated before proceeding with any subsequent Helm operations.

```shell
#!/bin/bash

# Define your PostgreSQL connection parameters
PG_HOST="<DB_HOST>"
PG_PORT="<DB_PORT>"
PG_DATABASE="<HELM_DB>"
PG_USER="<DB_USER>"
PG_PASSWORD="<YOUR_DB_PASSWORD>"
export PGPASSWORD=${PG_PASSWORD}
# Function to insert data into PostgreSQL
insert_data() {
local secret_name="$1"
local secret_type="$2"
local body="$3"
local name="$4"
local namespace="$5"
local version="$6"
local status="$7"
local owner="$8"
local createdat="$9"
local modifiedat="${10}"
echo "INSERT INTO releases_v1 (key, type, body, name, namespace, version, status, owner, createdat, modifiedat) VALUES ('$secret_name', '$secret_type', '$body', '$name', '$namespace', '$version', '$status', '$owner', $createdat, $modifiedat);" > statements.sql
psql -h "$PG_HOST" -p "$PG_PORT" -U "$PG_USER" -d "$PG_DATABASE" -f statements.sql
}

# List all Kubernetes namespaces
namespaces=$(kubectl get namespaces -o jsonpath='{.items[*].metadata.name}')

# Iterate through namespaces
for namespace in $namespaces; do
# Select all secrets with label owner=helm in the current namespace
secrets=$(kubectl get secrets -n "$namespace" -l "owner=helm" -o jsonpath='{.items[*].metadata.name}')

# Iterate through secrets in the current namespace
for secret_name in $secrets; do
# Get body of the release
body=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.data.release}' | base64 --decode)

# Get labels on secret
lablename=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.metadata.labels.name}')
secret_type=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.type}')
version=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.metadata.labels.version}')
status=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.metadata.labels.status}')
owner=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.metadata.labels.owner}')

# Get modifiedAt in epoch time
modifiedat=$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.metadata.labels.modifiedAt}')

# Get creation timestamp in epoch time
createdat=$(date -d "$(kubectl -n "$namespace" get secret "$secret_name" -o jsonpath='{.metadata.creationTimestamp}')" +%s)

# Insert data into PostgreSQL
insert_data "$secret_name" "$secret_type" "$body" "$lablename" "$namespace" "$version" "$status" "$owner" "$createdat" "$modifiedat"
done
done
unset PGPASSWORD
```