feat(charts): add coprocessor-sql-exporter

charts/coprocessor-sql-exporter/Chart.yaml

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+apiVersion: v2
+name: fhevm-sql-exporter
+description: A Helm chart for Kubernetes
+type: application
+version: 1.0.0
+appVersion: "1.16.0"
+dependencies:
+  - name: prometheus-sql-exporter
+    repository: oci://ghcr.io/prometheus-community/charts
+    version: 0.4.0

charts/coprocessor-sql-exporter/config/config.yml

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+# This configuration can be tested with https://github.com/justwatchcom/sql_exporter
+# Configuration reference: https://github.com/justwatchcom/sql_exporter/blob/master/config.yml.dist
+jobs:
+  - name: "coprocessor-database"
+    interval: '30s'
+    connections:
+      - 'postgres://{{DATABASE_USERNAME}}:{{DATABASE_PASSWORD}}@{{DATABASE_ENDPOINT}}/{{DATABASE_NAME}}'
+    startup_sql:
+      - 'SET lock_timeout = 1000'
+      - 'SET idle_in_transaction_session_timeout = 100'
+    queries:
+      - name: "allowed_handles_txn_sent"
+        help: "Number of allowed handles transactions sent"
+        labels:
+          - "status"
+        values:
+          - "count"
+        query: |
+          SELECT 'txn_sent' AS status, count(*)::float
+          FROM allowed_handles
+          WHERE txn_is_sent = true
+          UNION ALL
+          SELECT 'txn_unsent' AS status, count(*)::float
+          FROM allowed_handles
+          WHERE txn_is_sent = false;
+      - name: "ciphertext_txn_sent"
+        help: "Number of ciphertext transactions sent"
+        labels:
+          - "status"
+        values:
+          - "count"
+        query: |
+          SELECT 'txn_sent' AS status, count(*)::float
+          FROM ciphertext_digest
+          WHERE txn_is_sent = true
+          UNION ALL
+          SELECT 'txn_unsent' AS status, count(*)::float
+          FROM ciphertext_digest
+          WHERE txn_is_sent = false;
+      - name: "computations_completion"
+        help: "Number of computations done"
+        labels:
+          - "status"
+        values:
+          - "count"
+        query: |
+          SELECT 'completed' AS status, COUNT(*)::float
+          FROM computations
+          WHERE is_completed = true
+          UNION ALL
+          SELECT 'uncompleted', COUNT(*)::float
+          FROM computations
+          WHERE is_completed = false;
+      - name: "pbs_completion"
+        help: "Number of PBS done"
+        labels:
+          - "status"
+        values:
+          - "count"
+        query: |
+          SELECT 'completed' AS status, COUNT(*)::float
+          FROM pbs_computations
+          WHERE is_completed = true
+          UNION ALL
+          SELECT 'uncompleted', COUNT(*)::float
+          FROM pbs_computations
+          WHERE is_completed = false;
+      - name: "ciphertexts"
+        help: "Number of ciphertexts in ciphertexts table"
+        labels:
+          - "status"
+        values:
+          - "count"
+        query: |
+          SELECT COUNT(*)::float
+          FROM ciphertexts;
+      - name: "zkproof"
+        help: "Number of remaining ZK-Proof to process"
+        labels:
+          - "status"
+        values:
+          - "count"
+        query: |
+          SELECT COUNT(*)::float
+          FROM verify_proofs;

charts/coprocessor-sql-exporter/templates/configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: coprocessor-sql-exporter-config
+data:
+  config: |-
+{{ .Files.Get "config/config.yml" | indent 4 }}

charts/coprocessor-sql-exporter/values.yaml

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+prometheus-sql-exporter:
+  replicaCount: 1
+
+  image:
+    repository: ghcr.io/justwatchcom/sql_exporter
+    tag: "v0.9"
+
+  serviceMonitor:
+    enabled: true
+    interval: 30s
+
+  extraEnvs:
+    - name: DATABASE_ENDPOINT
+      valueFrom:
+        secretKeyRef:
+          name: database-credentials
+          key: endpoint
+    - name: DATABASE_USERNAME
+      valueFrom:
+        secretKeyRef:
+          name: database-credentials
+          key: username
+    - name: DATABASE_PASSWORD
+      valueFrom:
+        secretKeyRef:
+          name: database-credentials
+          key: password
+    - name: DATABASE_NAME
+      value: "coprocessor"
+  extraVolumes:
+    - name: custom-config
+      configMap:
+        name: coprocessor-sql-exporter-config
+  extraVolumeMounts:
+    - name: custom-config
+      mountPath: /custom-config.yml
+      subPath: config
+  configFilePath: "/custom-config.yml"