Weave Scope 是一款 Docker 和 Kubernetes 的可視化監控工具。它提供了自上而下的應用程式視圖以及整個基礎架構視圖，使用者可以輕松對分布式的容器化應用進行實時監控和問題診斷，以確定容器應用程式的穩定性和性能。
Weave Scope 可以監控 Kubernetes 叢集中的一系列資源的狀态、資源使用情況、應用拓撲、scale，還可以通過浏覽器直接進入容器内部調試等。其提供的功能包括:
互動式拓撲界面
圖形模式和表格模式
過濾功能
搜尋功能
實時度量
容器排錯
插件擴充
Weave Scope 由
App
和
Probe Agent
兩部分組成：
Probe Agent：負責收集容器和宿主的資訊，發送給App
App：負責處理收集的資訊，生成相應報告，并以互動界面的形式展示
官網：https://www.weave.works/ ，最新版本：1.13.1
k8s以DaemonSet方式部署 scope agent，以Deployment方式部署 scope app：
weave-scope.yaml
apiVersion: v1
kind: Namespace
metadata:
name: weave
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: weave-scope
namespace: weave
labels:
name: weave-scope
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: weave-scope
labels:
name: weave-scope
rules:
- apiGroups:
- ''
resources:
- pods
verbs:
- get
- list
- watch
- delete
- apiGroups:
- ''
resources:
- pods/log
- services
- nodes
- namespaces
- persistentvolumes
- persistentvolumeclaims
verbs:
- get
- list
- watch
- apiGroups:
- apps
resources:
- deployments
- daemonsets
- statefulsets
verbs:
- get
- list
- watch
- apiGroups:
- batch
resources:
- cronjobs
- jobs
verbs:
- get
- list
- watch
- apiGroups:
- extensions
resources:
- deployments
- daemonsets
verbs:
- get
- list
- watch
- apiGroups:
- apps
resources:
- deployments/scale
verbs:
- get
- update
- apiGroups:
- extensions
resources:
- deployments/scale
verbs:
- get
- update
- apiGroups:
- storage.k8s.io
resources:
- storageclasses
verbs:
- get
- list
- watch
- apiGroups:
- volumesnapshot.external-storage.k8s.io
resources:
- volumesnapshots
- volumesnapshotdatas
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: weave-scope
labels:
name: weave-scope
roleRef:
kind: ClusterRole
name: weave-scope
apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
name: weave-scope
namespace: weave
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: weave-scope
namespace: weave
spec:
rules:
- host: scope.lzxlinux.com
http:
paths:
- path: /
backend:
serviceName: weave-scope-app
servicePort: 80
---
apiVersion: v1
kind: Service
metadata:
name: weave-scope-app
namespace: weave
labels:
name: weave-scope-app
app: weave-scope
weave-cloud-component: scope
weave-scope-component: app
spec:
ports:
- name: app
port: 80
protocol: TCP
targetPort: 4040
selector:
name: weave-scope-app
app: weave-scope
weave-cloud-component: scope
weave-scope-component: app
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: weave-scope-app
namespace: weave
labels:
name: weave-scope-app
app: weave-scope
weave-cloud-component: scope
weave-scope-component: app
spec:
replicas: 1
selector:
matchLabels:
name: weave-scope-app
app: weave-scope
weave-cloud-component: scope
weave-scope-component: app
template:
metadata:
labels:
name: weave-scope-app
app: weave-scope
weave-cloud-component: scope
weave-scope-component: app
spec:
containers:
- name: app
image: docker.io/weaveworks/scope:1.13.1
imagePullPolicy: IfNotPresent
ports:
- containerPort: 4040
protocol: TCP
args:
- '--mode=app'
command:
- /home/weave/scope
env: []
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: weave-scope-cluster-agent
namespace: weave
labels:
name: weave-scope-cluster-agent
app: weave-scope
weave-cloud-component: scope
weave-scope-component: cluster-agent
spec:
replicas: 1
selector:
matchLabels:
name: weave-scope-cluster-agent
app: weave-scope
weave-cloud-component: scope
weave-scope-component: cluster-agent
template:
metadata:
labels:
name: weave-scope-cluster-agent
app: weave-scope
weave-cloud-component: scope
weave-scope-component: cluster-agent
spec:
serviceAccountName: weave-scope
containers:
- name: scope-cluster-agent
image: docker.io/weaveworks/scope:1.13.1
imagePullPolicy: IfNotPresent
ports:
- containerPort: 4041
protocol: TCP
args:
- '--mode=probe'
- '--probe-only'
- '--probe.kubernetes.role=cluster'
- '--probe.http.listen=:4041'
- '--probe.publish.interval=4500ms'
- '--probe.spy.interval=2s'
- 'weave-scope-app.weave.svc.cluster.local:80'
command:
- /home/weave/scope
env: []
resources:
limits:
memory: 2000Mi
requests:
cpu: 25m
memory: 80Mi
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: weave-scope-agent
namespace: weave
labels:
name: weave-scope-agent
app: weave-scope
weave-cloud-component: scope
weave-scope-component: agent
spec:
updateStrategy:
type: RollingUpdate
minReadySeconds: 5
selector:
matchLabels:
name: weave-scope-agent
app: weave-scope
weave-cloud-component: scope
weave-scope-component: agent
template:
metadata:
labels:
name: weave-scope-agent
app: weave-scope
weave-cloud-component: scope
weave-scope-component: agent
spec:
containers:
- name: scope-agent
image: docker.io/weaveworks/scope:1.13.1
imagePullPolicy: IfNotPresent
args:
- '--mode=probe'
- '--probe-only'
- '--probe.kubernetes.role=host'
- '--probe.publish.interval=4500ms'
- '--probe.spy.interval=2s'
- '--probe.docker.bridge=docker0'
- '--probe.docker=true'
- 'weave-scope-app.weave.svc.cluster.local:80'
command:
- /home/weave/scope
env: []
resources:
limits:
memory: 2000Mi
requests:
cpu: 100m
memory: 100Mi
securityContext:
privileged: true
volumeMounts:
- name: scope-plugins
mountPath: /var/run/scope/plugins
- name: sys-kernel-debug
mountPath: /sys/kernel/debug
- name: docker-socket
mountPath: /var/run/docker.sock
volumes:
- name: scope-plugins
hostPath:
path: /var/run/scope/plugins
- name: sys-kernel-debug
hostPath:
path: /sys/kernel/debug
- name: docker-socket
hostPath:
path: /var/run/docker.sock
dnsPolicy: ClusterFirstWithHostNet
hostNetwork: true
hostPID: true
tolerations:
- effect: NoSchedule
operator: Exists
- effect: NoExecute
operator: Exists
- 部署：
kubectl apply -f weave-scope.yaml
kubectl get svc -n weave
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
weave-scope-app ClusterIP 10.106.124.95 <none> 80/TCP 25s
kubectl get pod -n weave
NAME READY STATUS RESTARTS AGE
weave-scope-agent-27zpb 1/1 Running 0 32s
weave-scope-agent-c5hcq 1/1 Running 0 32s
weave-scope-agent-j4tf7 1/1 Running 0 32s
weave-scope-agent-s8p6s 1/1 Running 0 32s
weave-scope-app-bc7444d59-6xwkk 1/1 Running 0 33s
weave-scope-cluster-agent-5c5dcc8cb-4d7mh 1/1 Running 0 33s
- 通路ui：
添加hosts：
scope.lzxlinux.com
，通路
scope.lzxlinux.com
可以看到，目前k8s叢集有4個節點（1個master，3個node）。
- ui操作：
以pod資源對象為例，Weave Scope監控對象有程序、容器、pods、主機等，監控項有cpu、記憶體、平均負載等。
圖形模式，
表格模式，
點選某個pod，會展示狀态、資源使用、程序等詳細資訊，
點選pod的
Get logs
，會打開Terminal檢視日志，
點選pod的
Describe
，會打開Terminal檢視資源資訊（類似
kubectl describe
指令），
點選
Controllers
，對于Deployment，可以直接擴縮容以及檢視POD的數量和詳細資訊，
點選
Containers
，可以對容器進行
attach
、
exec shell
、
restart
、
pause
、
stop
操作，
此外，左下角可按條件展示，如命名空間、容器類型（系統或應用）、容器狀态（停止或運作）等，
同時，搜尋欄可以按條件搜尋相應的資源對象，如命名空間、對象類型、對象名稱、image及版本、運作狀态、資源使用率等，
至此，k8s部署weave scope完成。已存放至個人github：kubernetes