feat: Add agent for collecting information

Dockerfile

@@ -38,4 +38,5 @@ USER 65532:65532
 ENV STATIC_ASSET_PATH=/app/static
 ENV LOG_FORMAT=json
 
-ENTRYPOINT ["/app/dumb-init", "--", "/app/ledger", "server"]
+ENTRYPOINT ["/app/dumb-init", "--", "/app/ledger"]
+CMD [ "server" ]

README.md

@@ -1,3 +1,19 @@
+## Collecting versions
+
+### Sending by installing the included agent in your cluster
+
+It will collect changes to Deployments and Statefulsets
+
+### Sending using the included client
+
+```bash
+curl -o ledger https://[ledger-installation]/download
+chmod +x ledger
+./ledger client new-version app env version
+```
+
+### Sending using the GraphQL API
+
 ```bash
 export TOKEN=ey...
 

charts/ledger-agent/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/ledger-agent/Chart.yaml

@@ -0,0 +1,15 @@
+apiVersion: v2
+name: ledger-agent
+description: A Helm chart for Kubernetes
+type: application
+version: 0.3.0
+appVersion: 1.0.0
+maintainers:
+  - email: [email protected]
+    name: Stenic
+icon: https://raw.githubusercontent.com/stenic/ledger/gh-pages/images/logo.png
+home: https://github.com/stenic/ledger/tree/main/charts/ledger
+sources:
+  - https://github.com/stenic/ledger
+keywords:
+  - deployment

charts/ledger-agent/templates/_helpers.tpl

@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "ledger-agent.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "ledger-agent.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "ledger-agent.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "ledger-agent.labels" -}}
+helm.sh/chart: {{ include "ledger-agent.chart" . }}
+{{ include "ledger-agent.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "ledger-agent.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "ledger-agent.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "ledger-agent.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "ledger-agent.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

charts/ledger-agent/templates/deployment.yaml

@@ -0,0 +1,59 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "ledger-agent.fullname" . }}
+  labels:
+    {{- include "ledger-agent.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      {{- include "ledger-agent.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "ledger-agent.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "ledger-agent.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          args: [ "agent" ]
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          env:
+            - name: LEDGER_ENDPOINT
+              valueFrom:
+                secretKeyRef:
+                  key: endpoint
+                  name: {{ include "ledger-agent.fullname" . }}
+            - name: TOKEN
+              valueFrom:
+                secretKeyRef:
+                  key: token
+                  name: {{ include "ledger-agent.fullname" . }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

charts/ledger-agent/templates/role.yaml

@@ -0,0 +1,14 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: {{ include "ledger-agent.fullname" . }}
+  labels:
+    {{- include "ledger-agent.labels" . | nindent 4 }}
+rules:
+- apiGroups:
+  - "apps"
+  resources:
+  - deployments
+  - statefulsets
+  verbs:
+  - list

charts/ledger-agent/templates/rolebinding.yaml

@@ -0,0 +1,14 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: {{ include "ledger-agent.fullname" . }}
+  labels:
+    {{- include "ledger-agent.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: {{ include "ledger-agent.fullname" . }}
+subjects:
+- kind: ServiceAccount
+  name: {{ include "ledger-agent.serviceAccountName" . }}
+  namespace: {{ .Release.Namespace }}

charts/ledger-agent/templates/secret.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Secret
+type: Opaque
+metadata:
+  name: {{ include "ledger-agent.fullname" . }}
+  labels:
+    {{- include "ledger-agent.labels" . | nindent 4 }}
+data:
+  endpoint: {{ .Values.ledgerAgent.endpoint | b64enc }}
+  token: {{ .Values.ledgerAgent.token | b64enc }}
+  log-level: {{ .Values.ledgerAgent.log.level | b64enc }}

charts/ledger-agent/templates/serviceaccount.yaml

@@ -0,0 +1,12 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "ledger-agent.serviceAccountName" . }}
+  labels:
+    {{- include "ledger-agent.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

charts/ledger-agent/values.yaml

@@ -0,0 +1,73 @@
+# Default values for ledger.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+# replicaCount -- Desired number of pods
+replicaCount: 2
+
+image:
+  # image.repository -- ledger image repository
+  repository: ghcr.io/stenic/ledger
+  # image.pullPolicy -- ledger image pullPolicy
+  pullPolicy: Always
+  # image.tag -- ledger image tag (immutable tags are recommended)
+  # Overrides the image tag whose default is the chart appVersion.
+  tag: ""
+
+# imagePullSecrets -- Docker registry secret names as an array
+imagePullSecrets: []
+# nameOverride -- String to partially override fullname
+nameOverride: ""
+# fullnameOverride -- String to fully override fullname
+fullnameOverride: ""
+
+serviceAccount:
+  # serviceAccount.create -- Specifies whether a ServiceAccount should be created
+  create: true
+  # Annotations to add to the service account
+  annotations: {}
+  # serviceAccount.name -- The name of the ServiceAccount to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: ""
+
+# podAnnotations -- Additional annotations for the pods.
+podAnnotations: {}
+
+# podSecurityContext -- Enable Controller pods' Security Context
+podSecurityContext: {}
+  # fsGroup: 2000
+
+# securityContext -- Enable Controller containers' Security Context
+securityContext:
+  allowPrivilegeEscalation: false
+  runAsNonRoot: true
+  readOnlyRootFilesystem: true
+  capabilities:
+    drop:
+    - ALL
+  runAsUser: 100012
+  runAsGroup: 100012
+
+# resources -- Resource requests and limits for the controller
+resources:
+  limits:
+    cpu: 200m
+    memory: 64Mi
+  requests:
+    cpu: 50m
+    memory: 64Mi
+
+# nodeSelector -- Node labels for controller pod assignment
+nodeSelector: {}
+
+# affinity -- Affinity and anti-affinity
+affinity: {}
+
+# tolerations -- Node tolerations for server scheduling to nodes with taints
+tolerations: []
+
+ledgerAgent:
+  endpoint: ledger
+  token: test
+  log:
+    level: info

cmd/ledger/agent.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/stenic/ledger/internal/agent"
+	"github.com/stenic/ledger/internal/pkg/utils/env"
+)
+
+func NewAgentCmd() *cobra.Command {
+	var (
+		endpoint string
+	)
+
+	cmd := &cobra.Command{
+		Use:   "agent",
+		Short: "Ledger cluster agent",
+		Run: func(c *cobra.Command, args []string) {
+			agent.Run(endpoint)
+		},
+	}
+
+	cmd.Flags().StringVar(&endpoint, "endpoint", env.GetString("LEDGER_ENDPOINT", "http://127.0.0.1:8080"), "Ledger endpoint url")
+
+	return cmd
+}
+
+func init() {
+	rootCommand.AddCommand(NewAgentCmd())
+}