Appendixes

kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rubik
rules:
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["list", "watch"]
  - apiGroups: [""]
    resources: ["pods/eviction"]
    verbs: ["create"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rubik
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: rubik
subjects:
  - kind: ServiceAccount
    name: rubik
    namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: rubik
  namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: rubik-config
  namespace: kube-system
data:
  config.json: |
    {
      "agent": {
        "logDriver": "stdio",
        "logDir": "/var/log/rubik",
        "logSize": 1024,
        "logLevel": "info",
        "cgroupRoot": "/sys/fs/cgroup",
        "enabledFeatures": [
          "preemption"
        ]
      },
      "preemption": {
        "resource": [
          "cpu"
        ]
      }
    }    
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: rubik-agent
  namespace: kube-system
  labels:
    k8s-app: rubik-agent
spec:
  selector:
    matchLabels:
      name: rubik-agent
  template:
    metadata:
      namespace: kube-system
      labels:
        name: rubik-agent
    spec:
      serviceAccountName: rubik
      hostPID: true
      containers:
      - name: rubik-agent
        image: hub.oepkgs.net/cloudnative/rubik:latest
        imagePullPolicy: IfNotPresent
        env:
          - name: RUBIK_NODE_NAME
            valueFrom:
              fieldRef:
                fieldPath: spec.nodeName
        securityContext:
          capabilities:
            add:
            - SYS_ADMIN
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
        volumeMounts:
        - name: rubiklog
          mountPath: /var/log/rubik
          readOnly: false
        - name: runrubik
          mountPath: /run/rubik
          readOnly: false
        - name: sysfs
          mountPath: /sys/fs
          readOnly: false
        - name: devfs
          mountPath: /dev
          readOnly: false
        - name: config-volume
          mountPath: /var/lib/rubik
      terminationGracePeriodSeconds: 30
      volumes:
      - name: rubiklog
        hostPath:
          path: /var/log/rubik
      - name: runrubik
        hostPath:
          path: /run/rubik
      - name: sysfs
        hostPath:
          path: /sys/fs
      - name: devfs
        hostPath:
          path: /dev
      - name: config-volume
        configMap:
          name: rubik-config
          items:
          - key: config.json
            path: config.json

#!/bin/bash
set -e

CURRENT_DIR=$(cd "$(dirname "$0")" && pwd)
BINARY_NAME="rubik"

RUBIK_FILE="${CURRENT_DIR}/build/rubik"
DOCKERFILE="${CURRENT_DIR}/Dockerfile"
YAML_FILE="${CURRENT_DIR}/rubik-daemonset.yaml"

# Get version and release number of rubik binary
VERSION=$(${RUBIK_FILE} -v | grep ^Version | awk '{print $NF}')
RELEASE=$(${RUBIK_FILE} -v | grep ^Release | awk '{print $NF}')
IMG_TAG="${VERSION}-${RELEASE}"

# Get rubik image name and tag
IMG_NAME_AND_TAG="${BINARY_NAME}:${IMG_TAG}"

# Build container image for rubik
docker build -f "${DOCKERFILE}" -t "${IMG_NAME_AND_TAG}" "${CURRENT_DIR}"

echo -e "\n"
# Check image existence
docker images | grep -E "REPOSITORY|${BINARY_NAME}"

# Modify rubik-daemonset.yaml file, set rubik image name
sed -i "/image:/s/:.*/: ${IMG_NAME_AND_TAG}/" "${YAML_FILE}"