前文我們了解了k8s上的Pod資源的生命周期、健康狀態和就緒狀態探測以及資源限制相關話題，回顧請參考https://www.cnblogs.com/qiuhom-1874/p/14143610.html；今天我們來了解下Pod控制器相關話題；
在k8s上控制器就是k8s的“大腦”，在聊k8s開篇時，我們說過控制器主要負責創建，管理k8s上的資源，如果對應資源不吻合用戶定義的資源狀態，它就會嘗試重啟或重建的方式讓其狀態和用戶定義的狀態吻合；在k8s上控制器的型別有很多，比如pod控制，service控制器，endpoint控制器等等；不同型別的控制器有著不同的功能和作用；比如pod控制器就是針對pod資源進行管理的控制器；單說pod控制器，它也有很多型別，根據pod里容器跑的應用程式來分類，可以分為有狀態應用和無狀態應用控制，從應用程式是否運行為守護行程我們可以將控制器分為，守護行程和非守護行程控制器；其中無狀態控制器中最常用的有ReplicaSet控制器和Deployment控制；有狀態應用控制器常用的有StatefulSet；守護行程控制器最常用的有daemonSet控制器；非守護行程控制器有job控制器，對Job型別的控制器，如果要周期性執行的有Cronjob控制器；
1、ReplicaSet控制器
ReplicaSet控制器的主要作用是確保Pod物件副本數量在任何時刻都能精準滿足用戶期望的數量；這種控制器啟動以后，它首先會查找集群中匹配其標簽選擇器的Pod資源物件，當活動pod數量與用戶期望的pod數量不吻合時，如果多了就洗掉，少了就創建；它創建新pod是靠我們在配置清單中定義的pod模板來創建新pod；
示例：定義創建ReplicaSet控制器
[root@master01 ~]# cat ReplicaSet-controller-demo.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: replicaset-demo
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: nginx-pod
template:
metadata:
labels:
app: nginx-pod
spec:
containers:
- name: nginx
image: nginx:1.14-alpine
ports:
- name: http
containerPort: 80
[root@master01 ~]#
提示：定義ReplicaSet控制器，apiVersion欄位的值為apps/v1，kind為ReplicaSet，這兩個欄位都是固定的；后面的metadata中主要定義名稱和名稱空間；spec中主要定義replicas、selector、template；其中replicas這個欄位的值為一個整數，表示對應pod的副本數量；selector用于定義標簽選擇器；其值為一個物件，其中matchLabels欄位表示精確匹配標簽，這個欄位的值為一個字典；除了精確匹配標簽選擇器這種方式，還有matchExpressions表示使用匹配運算式，其值為一個物件；簡單說定義標簽選擇器，第一種是matchLabels，這種方式就是指定一個或多個標簽，每個標簽就是一個kvj鍵值對；后者matchExpressions是指定一個運算式，其值為一個物件，這個物件中主要定義key欄位，這個欄位定義key的名稱；operator定義運算子，values定義值；key和operator欄位的值型別都是字串，其中operator的值有In, NotIn, Exists和DoesNotExist；values是一個字串串列；其次就是定義pod模板，使用template欄位定義，該欄位的值為一個物件其中metadata欄位用于定義模板的元素據資訊，這個元資料資訊必須定義標簽屬性；通常這個標簽屬性和選擇器中的標簽相同；spec欄位用于定義pod模板的狀態，最重要的是定義pod里容器的名字，鏡像等等；
應用資源配置清單
[root@master01 ~]# kubectl apply -f ReplicaSet-controller-demo.yaml replicaset.apps/replicaset-demo created [root@master01 ~]# kubectl get rs NAME DESIRED CURRENT READY AGE replicaset-demo 3 3 3 9s [root@master01 ~]# kubectl get rs -o wide NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR replicaset-demo 3 3 3 17s nginx nginx:1.14-alpine app=nginx-pod [root@master01 ~]#
提示：rs就是ReplicaSet的簡寫；從上面的資訊可以看到對應控制器已經創建；并且當前pod副本數量為3，用戶期望的數量也為3，有3個準備就緒；
查看pod
[root@master01 ~]# kubectl get pod -L app NAME READY STATUS RESTARTS AGE APP replicaset-demo-rsl7q 1/1 Running 0 2m57s nginx-pod replicaset-demo-twknl 1/1 Running 0 2m57s nginx-pod replicaset-demo-vzdbb 1/1 Running 0 2m57s nginx-pod [root@master01 ~]#
提示：可以看到當前default名稱空間中創建了3個pod,其標簽為nginx-pod；
測驗：更改其中一個pod的標簽為ngx,看看對應控制器是否會新建一個標簽為nginx-pod的pod呢？
[root@master01 ~]# kubectl get pod -L app NAME READY STATUS RESTARTS AGE APP replicaset-demo-rsl7q 1/1 Running 0 5m48s nginx-pod replicaset-demo-twknl 1/1 Running 0 5m48s nginx-pod replicaset-demo-vzdbb 1/1 Running 0 5m48s nginx-pod [root@master01 ~]# kubectl label pod/replicaset-demo-vzdbb app=ngx --overwrite pod/replicaset-demo-vzdbb labeled [root@master01 ~]# kubectl get pod -L app NAME READY STATUS RESTARTS AGE APP replicaset-demo-qv8tp 1/1 Running 0 4s nginx-pod replicaset-demo-rsl7q 1/1 Running 0 6m2s nginx-pod replicaset-demo-twknl 1/1 Running 0 6m2s nginx-pod replicaset-demo-vzdbb 1/1 Running 0 6m2s ngx [root@master01 ~]#
提示：可以看到當我們把其中一個pod的標簽更改為app=ngx后，對應控制器又會根據pod模板創建一個新pod；
測驗：更改pod標簽為app=nginx-pod，看看對應控制器是否會洗掉一個pod呢？
[root@master01 ~]# kubectl get pod -L app NAME READY STATUS RESTARTS AGE APP replicaset-demo-qv8tp 1/1 Running 0 2m35s nginx-pod replicaset-demo-rsl7q 1/1 Running 0 8m33s nginx-pod replicaset-demo-twknl 1/1 Running 0 8m33s nginx-pod replicaset-demo-vzdbb 1/1 Running 0 8m33s ngx [root@master01 ~]# kubectl label pod/replicaset-demo-vzdbb app=nginx-pod --overwrite pod/replicaset-demo-vzdbb labeled [root@master01 ~]# kubectl get pod -L app NAME READY STATUS RESTARTS AGE APP replicaset-demo-qv8tp 0/1 Terminating 0 2m50s nginx-pod replicaset-demo-rsl7q 1/1 Running 0 8m48s nginx-pod replicaset-demo-twknl 1/1 Running 0 8m48s nginx-pod replicaset-demo-vzdbb 1/1 Running 0 8m48s nginx-pod [root@master01 ~]# kubectl get pod -L app NAME READY STATUS RESTARTS AGE APP replicaset-demo-rsl7q 1/1 Running 0 8m57s nginx-pod replicaset-demo-twknl 1/1 Running 0 8m57s nginx-pod replicaset-demo-vzdbb 1/1 Running 0 8m57s nginx-pod [root@master01 ~]#
提示：可以看到當集群中有多余用戶期望數量的pod標簽時，對應控制器會把多余的相同標簽的pod洗掉；從上面的測驗可以看到ReplicaSet控制器是依靠標簽選擇器來判斷集群中pod的數量是否和用戶定義的數量吻合，如果不吻合就嘗試洗掉或新建，讓對應pod數量精確滿足用戶期望pod數量；
查看rs控制器的詳細資訊
[root@master01 ~]# kubectl describe rs replicaset-demo
Name: replicaset-demo
Namespace: default
Selector: app=nginx-pod
Labels: <none>
Annotations: <none>
Replicas: 3 current / 3 desired
Pods Status: 3 Running / 0 Waiting / 0 Succeeded / 0 Failed
Pod Template:
Labels: app=nginx-pod
Containers:
nginx:
Image: nginx:1.14-alpine
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal SuccessfulCreate 20m replicaset-controller Created pod: replicaset-demo-twknl
Normal SuccessfulCreate 20m replicaset-controller Created pod: replicaset-demo-vzdbb
Normal SuccessfulCreate 20m replicaset-controller Created pod: replicaset-demo-rsl7q
Normal SuccessfulCreate 15m replicaset-controller Created pod: replicaset-demo-qv8tp
Normal SuccessfulDelete 12m replicaset-controller Deleted pod: replicaset-demo-qv8tp
[root@master01 ~]#
擴展/縮減rs控制pod副本數量
[root@master01 ~]# kubectl scale rs replicaset-demo --replicas=6 replicaset.apps/replicaset-demo scaled [root@master01 ~]# kubectl get rs NAME DESIRED CURRENT READY AGE replicaset-demo 6 6 6 32m [root@master01 ~]# kubectl scale rs replicaset-demo --replicas=4 replicaset.apps/replicaset-demo scaled [root@master01 ~]# kubectl get rs NAME DESIRED CURRENT READY AGE replicaset-demo 4 4 4 32m [root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE replicaset-demo-5t9tt 0/1 Terminating 0 33s replicaset-demo-j75hk 1/1 Running 0 33s replicaset-demo-rsl7q 1/1 Running 0 33m replicaset-demo-twknl 1/1 Running 0 33m replicaset-demo-vvqfw 0/1 Terminating 0 33s replicaset-demo-vzdbb 1/1 Running 0 33m [root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE replicaset-demo-j75hk 1/1 Running 0 41s replicaset-demo-rsl7q 1/1 Running 0 33m replicaset-demo-twknl 1/1 Running 0 33m replicaset-demo-vzdbb 1/1 Running 0 33m [root@master01 ~]#
提示：scale也可以對控制器做擴展和縮減pod副本數量，除了以上使用命令的方式來變更對應pod副本數量；也可以直接在配置清單中修改replicas欄位，然后使用apply命令執行配置清單進行修改；
修改配置清單中的replicas欄位的值來擴展pod副本數量
[root@master01 ~]# cat ReplicaSet-controller-demo.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: replicaset-demo
namespace: default
spec:
replicas: 7
selector:
matchLabels:
app: nginx-pod
template:
metadata:
labels:
app: nginx-pod
spec:
containers:
- name: nginx
image: nginx:1.14-alpine
ports:
- name: http
containerPort: 80
[root@master01 ~]# kubectl apply -f ReplicaSet-controller-demo.yaml
replicaset.apps/replicaset-demo configured
[root@master01 ~]# kubectl get rs
NAME DESIRED CURRENT READY AGE
replicaset-demo 7 7 7 35m
[root@master01 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
replicaset-demo-j75hk 1/1 Running 0 3m33s
replicaset-demo-k2n9g 1/1 Running 0 9s
replicaset-demo-n7fmk 1/1 Running 0 9s
replicaset-demo-q4dc6 1/1 Running 0 9s
replicaset-demo-rsl7q 1/1 Running 0 36m
replicaset-demo-twknl 1/1 Running 0 36m
replicaset-demo-vzdbb 1/1 Running 0 36m
[root@master01 ~]#
更新pod版本
方式1修改資源配置清單中pod模板的版本，然后在使用apply命令來執行配置清單
[root@master01 ~]# cat ReplicaSet-controller-demo.yaml
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: replicaset-demo
namespace: default
spec:
replicas: 7
selector:
matchLabels:
app: nginx-pod
template:
metadata:
labels:
app: nginx-pod
spec:
containers:
- name: nginx
image: nginx:1.16-alpine
ports:
- name: http
containerPort: 80
[root@master01 ~]# kubectl apply -f ReplicaSet-controller-demo.yaml
replicaset.apps/replicaset-demo configured
[root@master01 ~]# kubectl get rs -o wide
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset-demo 7 7 7 55m nginx nginx:1.16-alpine app=nginx-pod
[root@master01 ~]#
提示：從上面命令可以看到，它顯示的鏡像版本是1.16的版本；
驗證：查看對應pod，看看對應pod中容器鏡像版本是否變成了1.16呢？
[root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE replicaset-demo-j75hk 1/1 Running 0 25m replicaset-demo-k2n9g 1/1 Running 0 21m replicaset-demo-n7fmk 1/1 Running 0 21m replicaset-demo-q4dc6 1/1 Running 0 21m replicaset-demo-rsl7q 1/1 Running 0 57m replicaset-demo-twknl 1/1 Running 0 57m replicaset-demo-vzdbb 1/1 Running 0 57m [root@master01 ~]#
提示：從pod創建的時間來看，pod沒有更新；
測驗：洗掉一個pod看看對應pod里容器鏡像是否會更新呢？
[root@master01 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
replicaset-demo-j75hk 1/1 Running 0 25m
replicaset-demo-k2n9g 1/1 Running 0 21m
replicaset-demo-n7fmk 1/1 Running 0 21m
replicaset-demo-q4dc6 1/1 Running 0 21m
replicaset-demo-rsl7q 1/1 Running 0 57m
replicaset-demo-twknl 1/1 Running 0 57m
replicaset-demo-vzdbb 1/1 Running 0 57m
[root@master01 ~]# kubectl delete pod/replicaset-demo-vzdbb
pod "replicaset-demo-vzdbb" deleted
[root@master01 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
replicaset-demo-9wqj9 0/1 ContainerCreating 0 10s
replicaset-demo-j75hk 1/1 Running 0 26m
replicaset-demo-k2n9g 1/1 Running 0 23m
replicaset-demo-n7fmk 1/1 Running 0 23m
replicaset-demo-q4dc6 1/1 Running 0 23m
replicaset-demo-rsl7q 1/1 Running 0 58m
replicaset-demo-twknl 1/1 Running 0 58m
[root@master01 ~]# kubectl describe pod/replicaset-demo-9wqj9 |grep Image
Image: nginx:1.16-alpine
Image ID: docker-pullable://nginx@sha256:5057451e461dda671da5e951019ddbff9d96a751fc7d548053523ca1f848c1ad
[root@master01 ~]#
提示：可以看到我們洗掉了一個pod，對應控制器又新建了一個pod，對應新建的pod鏡像版本就成為了新版本的pod；從上面測驗情況可以看到，對于rs控制器當pod模板中的鏡像版本發生更改，如果k8s集群上對應pod數量和用戶定義的數量吻合，此時rs控制器不會更新pod；只有新建后的pod才會擁有新版本；也就說如果我們要rs來對pod版本更新，就得洗掉原有老的pod后才會更新；
方式2使用命令更新pod版本
[root@master01 ~]# kubectl set image rs replicaset-demo nginx=nginx:1.18-alpine replicaset.apps/replicaset-demo image updated [root@master01 ~]# kubectl get rs -o wide NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR replicaset-demo 7 7 7 72m nginx nginx:1.18-alpine app=nginx-pod [root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE replicaset-demo-9wqj9 1/1 Running 0 13m replicaset-demo-j75hk 1/1 Running 0 40m replicaset-demo-k2n9g 1/1 Running 0 36m replicaset-demo-n7fmk 1/1 Running 0 36m replicaset-demo-q4dc6 1/1 Running 0 36m replicaset-demo-rsl7q 1/1 Running 0 72m replicaset-demo-twknl 1/1 Running 0 72m [root@master01 ~]#
提示：對于rs控制器，不管用命令還是修改資源配置清單中pod模板中鏡像版本，如果有和用戶期望數量的pod，它是不會自動更新pod版本的；只有手動洗掉老版本pod，對應新版本pod才會被創建；
2、deployment控制器
對于deployment控制來說，它的定義方式和rs控制都差不多，但deploy控制器的功能要比rs強大，它可以實作滾動更新，用戶手動定義更新策略；其實deploy控制器是在rs控制器的基礎上來管理pod；也就說我們在創建deploy控制器時，它自動會創建一個rs控制器；其中使用deployment控制器創建的pod名稱是由deploy控制器名稱加上“-”pod模板hash名稱加上“-”隨機字串；而對應rs控制器的名稱恰好就是deploy控制器名稱加“-”pod模板hash；即pod名稱就為rs控制器名稱加“-”隨機字串；
示例：創建deployment控制器
[root@master01 ~]# cat deploy-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-demo
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: ngx-dep-pod
template:
metadata:
labels:
app: ngx-dep-pod
spec:
containers:
- name: nginx
image: nginx:1.14-alpine
ports:
- name: http
containerPort: 80
[root@master01 ~]#
應用配置清單
[root@master01 ~]# kubectl apply -f deploy-demo.yaml deployment.apps/deploy-demo created [root@master01 ~]# kubectl get deploy -o wide NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deploy-demo 3/3 3 3 10s nginx nginx:1.14-alpine app=ngx-dep-pod [root@master01 ~]#
驗證：查看是否有rs控制器創建？
[root@master01 ~]# kubectl get rs NAME DESIRED CURRENT READY AGE deploy-demo-6d795f958b 3 3 3 57s replicaset-demo 7 7 7 84m [root@master01 ~]#
提示：可以看到有一個deploy-demo-6d795f958b的rs控制器被創建；
驗證：查看pod，看看對應pod名稱是否有rs控制器名稱加“-”一串隨機字串？
[root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE deploy-demo-6d795f958b-bppjr 1/1 Running 0 2m16s deploy-demo-6d795f958b-mxwkn 1/1 Running 0 2m16s deploy-demo-6d795f958b-sh76g 1/1 Running 0 2m16s replicaset-demo-9wqj9 1/1 Running 0 26m replicaset-demo-j75hk 1/1 Running 0 52m replicaset-demo-k2n9g 1/1 Running 0 49m replicaset-demo-n7fmk 1/1 Running 0 49m replicaset-demo-q4dc6 1/1 Running 0 49m replicaset-demo-rsl7q 1/1 Running 0 85m replicaset-demo-twknl 1/1 Running 0 85m [root@master01 ~]#
提示：可以看到有3個pod的名稱是deploy-demo-6d795f958b-加隨機字串；
更新pod版本
[root@master01 ~]# cat deploy-demo.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-demo
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: ngx-dep-pod
template:
metadata:
labels:
app: ngx-dep-pod
spec:
containers:
- name: nginx
image: nginx:1.16-alpine
ports:
- name: http
containerPort: 80
[root@master01 ~]# kubectl apply -f deploy-demo.yaml
deployment.apps/deploy-demo configured
[root@master01 ~]# kubectl get deploy -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deploy-demo 3/3 3 3 5m45s nginx nginx:1.16-alpine app=ngx-dep-pod
[root@master01 ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
deploy-demo-95cc58f4d-45l5c 1/1 Running 0 43s
deploy-demo-95cc58f4d-6bmb6 1/1 Running 0 45s
deploy-demo-95cc58f4d-7d5r5 1/1 Running 0 29s
replicaset-demo-9wqj9 1/1 Running 0 30m
replicaset-demo-j75hk 1/1 Running 0 56m
replicaset-demo-k2n9g 1/1 Running 0 53m
replicaset-demo-n7fmk 1/1 Running 0 53m
replicaset-demo-q4dc6 1/1 Running 0 53m
replicaset-demo-rsl7q 1/1 Running 0 89m
replicaset-demo-twknl 1/1 Running 0 89m
[root@master01 ~]#
提示：可以看到deploy控制器只要更改了pod模板中鏡像版本，對應pod會自動更新；
使用命令更新pod版本
[root@master01 ~]# kubectl set image deploy deploy-demo nginx=nginx:1.18-alpine deployment.apps/deploy-demo image updated [root@master01 ~]# kubectl get deploy NAME READY UP-TO-DATE AVAILABLE AGE deploy-demo 3/3 1 3 9m5s [root@master01 ~]# kubectl get deploy -o wide NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deploy-demo 3/3 1 3 9m11s nginx nginx:1.18-alpine app=ngx-dep-pod [root@master01 ~]# kubectl get deploy -o wide NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deploy-demo 3/3 3 3 9m38s nginx nginx:1.18-alpine app=ngx-dep-pod [root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE deploy-demo-567b54cd6-6h97c 1/1 Running 0 28s deploy-demo-567b54cd6-j74t4 1/1 Running 0 27s deploy-demo-567b54cd6-wcccx 1/1 Running 0 49s replicaset-demo-9wqj9 1/1 Running 0 34m replicaset-demo-j75hk 1/1 Running 0 60m replicaset-demo-k2n9g 1/1 Running 0 56m replicaset-demo-n7fmk 1/1 Running 0 56m replicaset-demo-q4dc6 1/1 Running 0 56m replicaset-demo-rsl7q 1/1 Running 0 92m replicaset-demo-twknl 1/1 Running 0 92m [root@master01 ~]#
提示：可以看到deploy控制器，只要修改了pod模板中鏡像的版本，對應pod就會隨之滾動更新到我們指定的版本；
查看rs歷史版本
[root@master01 ~]# kubectl get rs -o wide NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR deploy-demo-567b54cd6 3 3 3 3m50s nginx nginx:1.18-alpine app=ngx-dep-pod,pod-template-hash=567b54cd6 deploy-demo-6d795f958b 0 0 0 12m nginx nginx:1.14-alpine app=ngx-dep-pod,pod-template-hash=6d795f958b deploy-demo-95cc58f4d 0 0 0 7m27s nginx nginx:1.16-alpine app=ngx-dep-pod,pod-template-hash=95cc58f4d replicaset-demo 7 7 7 95m nginx nginx:1.18-alpine app=nginx-pod [root@master01 ~]#
提示：deploy控制器的更新pod版本操作，它會記錄rs的所有歷史版本；因為只要pod模板的hash值發生變化，對應的rs就會重新被創建一遍，不同于rs控制器，歷史版本的rs上沒有pod運行，只有當前版本的rs上才會運行pod；
查看更新歷史記錄
[root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 1 <none> 2 <none> 3 <none> [root@master01 ~]#
提示：這里可以看到有3個版本，沒有記錄對應的原因；這是因為我們在更新pod版本是沒有記錄；要想記錄器更新原因，可以在對應名后面加--record選項即可；
示例：記錄更新操作命令到更新歷史記錄
[root@master01 ~]# kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record deployment.apps/deploy-demo image updated [root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 2 <none> 3 <none> 4 kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record=true [root@master01 ~]# kubectl apply -f deploy-demo-nginx-1.16.yaml --record deployment.apps/deploy-demo configured [root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 3 <none> 4 kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record=true 5 kubectl apply --filename=deploy-demo-nginx-1.16.yaml --record=true [root@master01 ~]#
提示：可以看到更新操作時加上--record選項后，再次查看更新歷史記錄，就能顯示對應的更新命令；
回滾到上一個版本
[root@master01 ~]# kubectl get deploy -o wide NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deploy-demo 3/3 3 3 33m nginx nginx:1.16-alpine app=ngx-dep-pod [root@master01 ~]# kubectl get rs -o wide NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR deploy-demo-567b54cd6 0 0 0 24m nginx nginx:1.18-alpine app=ngx-dep-pod,pod-template-hash=567b54cd6 deploy-demo-6d795f958b 0 0 0 33m nginx nginx:1.14-alpine app=ngx-dep-pod,pod-template-hash=6d795f958b deploy-demo-95cc58f4d 3 3 3 28m nginx nginx:1.16-alpine app=ngx-dep-pod,pod-template-hash=95cc58f4d replicaset-demo 7 7 7 116m nginx nginx:1.18-alpine app=nginx-pod [root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 3 <none> 4 kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record=true 5 kubectl apply --filename=deploy-demo-nginx-1.16.yaml --record=true [root@master01 ~]# kubectl rollout undo deploy/deploy-demo deployment.apps/deploy-demo rolled back [root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 3 <none> 5 kubectl apply --filename=deploy-demo-nginx-1.16.yaml --record=true 6 kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record=true [root@master01 ~]# kubectl get deploy -o wide NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deploy-demo 3/3 3 3 34m nginx nginx:1.14-alpine app=ngx-dep-pod [root@master01 ~]# kubectl get rs -o wide NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR deploy-demo-567b54cd6 0 0 0 26m nginx nginx:1.18-alpine app=ngx-dep-pod,pod-template-hash=567b54cd6 deploy-demo-6d795f958b 3 3 3 35m nginx nginx:1.14-alpine app=ngx-dep-pod,pod-template-hash=6d795f958b deploy-demo-95cc58f4d 0 0 0 29m nginx nginx:1.16-alpine app=ngx-dep-pod,pod-template-hash=95cc58f4d replicaset-demo 7 7 7 118m nginx nginx:1.18-alpine app=nginx-pod [root@master01 ~]#
提示：可以看到執行了kubectl rollout undo deploy/deploy-demo命令后，對應版本從1.16就回滾到1.14的版本了；對應更新歷史記錄也把1.14版本更新為當前最新記錄；
回滾到指定歷史記錄版本
[root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 3 <none> 5 kubectl apply --filename=deploy-demo-nginx-1.16.yaml --record=true 6 kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record=true [root@master01 ~]# kubectl rollout undo deploy/deploy-demo --to-revision=3 deployment.apps/deploy-demo rolled back [root@master01 ~]# kubectl rollout history deploy/deploy-demo deployment.apps/deploy-demo REVISION CHANGE-CAUSE 5 kubectl apply --filename=deploy-demo-nginx-1.16.yaml --record=true 6 kubectl set image deploy deploy-demo nginx=nginx:1.14-alpine --record=true 7 <none> [root@master01 ~]# kubectl get deploy -o wide NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deploy-demo 3/3 3 3 42m nginx nginx:1.18-alpine app=ngx-dep-pod [root@master01 ~]# kubectl get rs -o wide NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR deploy-demo-567b54cd6 3 3 3 33m nginx nginx:1.18-alpine app=ngx-dep-pod,pod-template-hash=567b54cd6 deploy-demo-6d795f958b 0 0 0 42m nginx nginx:1.14-alpine app=ngx-dep-pod,pod-template-hash=6d795f958b deploy-demo-95cc58f4d 0 0 0 36m nginx nginx:1.16-alpine app=ngx-dep-pod,pod-template-hash=95cc58f4d replicaset-demo 7 7 7 125m nginx nginx:1.18-alpine app=nginx-pod [root@master01 ~]#
提示：指定要回滾到某個歷史記錄的版本，可以使用--to-revision選項來指定歷史記錄的編號；
查看deploy控制器的詳細資訊
[root@master01 ~]# kubectl describe deploy deploy-demo
Name: deploy-demo
Namespace: default
CreationTimestamp: Thu, 17 Dec 2020 23:40:11 +0800
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 7
Selector: app=ngx-dep-pod
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: app=ngx-dep-pod
Containers:
nginx:
Image: nginx:1.18-alpine
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: deploy-demo-567b54cd6 (3/3 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 58m deployment-controller Scaled down replica set deploy-demo-6d795f958b to 1
Normal ScalingReplicaSet 58m deployment-controller Scaled up replica set deploy-demo-95cc58f4d to 3
Normal ScalingReplicaSet 58m deployment-controller Scaled down replica set deploy-demo-6d795f958b to 0
Normal ScalingReplicaSet 55m deployment-controller Scaled up replica set deploy-demo-567b54cd6 to 1
Normal ScalingReplicaSet 54m deployment-controller Scaled down replica set deploy-demo-95cc58f4d to 2
Normal ScalingReplicaSet 38m deployment-controller Scaled up replica set deploy-demo-6d795f958b to 1
Normal ScalingReplicaSet 38m deployment-controller Scaled down replica set deploy-demo-567b54cd6 to 2
Normal ScalingReplicaSet 38m deployment-controller Scaled up replica set deploy-demo-6d795f958b to 2
Normal ScalingReplicaSet 37m deployment-controller Scaled down replica set deploy-demo-567b54cd6 to 1
Normal ScalingReplicaSet 37m deployment-controller Scaled down replica set deploy-demo-567b54cd6 to 0
Normal ScalingReplicaSet 33m (x2 over 58m) deployment-controller Scaled up replica set deploy-demo-95cc58f4d to 1
Normal ScalingReplicaSet 33m (x2 over 58m) deployment-controller Scaled up replica set deploy-demo-95cc58f4d to 2
Normal ScalingReplicaSet 33m (x2 over 58m) deployment-controller Scaled down replica set deploy-demo-6d795f958b to 2
Normal ScalingReplicaSet 29m (x3 over 64m) deployment-controller Scaled up replica set deploy-demo-6d795f958b to 3
Normal ScalingReplicaSet 22m (x14 over 54m) deployment-controller (combined from similar events): Scaled down replica set deploy-demo-6d795f958b to 2
[root@master01 ~]#
提示：查看deploy控制器的詳細資訊，可以看到對應pod模板，回滾的程序，以及默認更新策略等等資訊；
自定義滾動更新策略
[root@master01 ~]# cat deploy-demo-nginx-1.14.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-demo
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: ngx-dep-pod
template:
metadata:
labels:
app: ngx-dep-pod
spec:
containers:
- name: nginx
image: nginx:1.14-alpine
ports:
- name: http
containerPort: 80
strategy:
type: RollingUpdate
rollingUpdate:
maxSurge: 2
maxUnavailable: 1
minReadySeconds: 5
[root@master01 ~]#
提示：定義滾動更新策略需要使用strategy這個欄位，這個欄位的值是一個物件，其中type是指定更新策略，其策略有兩種，第一種是Recreate，這種策略更新方式是新建一個新版pod，然后再洗掉一個舊版pod以這種方式滾動更新；第二種是RollingUpdate，這種策略是用于我們手動指定的策略；其中maxSurge表示最大允許超出用戶期望的pod數量（即更新時允許新建超出用戶期望的pod數量），maxUnavailable表示最大允許少于用于期望的pod數量（即更新時可以一次洗掉幾個舊版pod）；最后minReadySeconds欄位不是定義更新策略的，它是spec中的一個欄位，用于限定pod最小就緒時長；以上更新策略表示，使用RollingUpdate型別策略，并指定最大新建pod超出用戶期望pod數量為2個，最大允許少于用戶期望pod數量為1個；pod最小就緒時間為5秒；
應用配置清單
[root@master01 ~]# kubectl apply -f deploy-demo-nginx-1.14.yaml
deployment.apps/deploy-demo configured
[root@master01 ~]# kubectl describe deploy/deploy-demo
Name: deploy-demo
Namespace: default
CreationTimestamp: Thu, 17 Dec 2020 23:40:11 +0800
Labels: <none>
Annotations: deployment.kubernetes.io/revision: 8
Selector: app=ngx-dep-pod
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 5
RollingUpdateStrategy: 1 max unavailable, 2 max surge
Pod Template:
Labels: app=ngx-dep-pod
Containers:
nginx:
Image: nginx:1.14-alpine
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: deploy-demo-6d795f958b (3/3 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 47m deployment-controller Scaled up replica set deploy-demo-6d795f958b to 1
Normal ScalingReplicaSet 47m deployment-controller Scaled down replica set deploy-demo-567b54cd6 to 1
Normal ScalingReplicaSet 42m (x2 over 68m) deployment-controller Scaled up replica set deploy-demo-95cc58f4d to 1
Normal ScalingReplicaSet 42m (x2 over 68m) deployment-controller Scaled up replica set deploy-demo-95cc58f4d to 2
Normal ScalingReplicaSet 42m (x2 over 68m) deployment-controller Scaled down replica set deploy-demo-6d795f958b to 2
Normal ScalingReplicaSet 31m (x14 over 64m) deployment-controller (combined from similar events): Scaled down replica set deploy-demo-6d795f958b to 2
Normal ScalingReplicaSet 41s (x4 over 73m) deployment-controller Scaled up replica set deploy-demo-6d795f958b to 3
Normal ScalingReplicaSet 41s (x2 over 47m) deployment-controller Scaled down replica set deploy-demo-567b54cd6 to 2
Normal ScalingReplicaSet 41s (x2 over 47m) deployment-controller Scaled up replica set deploy-demo-6d795f958b to 2
Normal ScalingReplicaSet 34s (x2 over 47m) deployment-controller Scaled down replica set deploy-demo-567b54cd6 to 0
[root@master01 ~]#
提示：可以看到對應deploy控制器的更新策略已經更改為我們定義的策略；為了能夠看出更新的效果，我們這里先手動把pod數量調整為10個；
擴展pod副本數量
[root@master01 ~]# kubectl scale deploy/deploy-demo --replicas=10 deployment.apps/deploy-demo scaled [root@master01 ~]# kubectl get pods NAME READY STATUS RESTARTS AGE deploy-demo-6d795f958b-5bdfw 1/1 Running 0 3m33s deploy-demo-6d795f958b-5zr7r 1/1 Running 0 8s deploy-demo-6d795f958b-9mc7k 1/1 Running 0 8s deploy-demo-6d795f958b-czwdp 1/1 Running 0 3m33s deploy-demo-6d795f958b-jfrnc 1/1 Running 0 8s deploy-demo-6d795f958b-jw9n8 1/1 Running 0 3m33s deploy-demo-6d795f958b-mbrlw 1/1 Running 0 8s deploy-demo-6d795f958b-ph99t 1/1 Running 0 8s deploy-demo-6d795f958b-wzscg 1/1 Running 0 8s deploy-demo-6d795f958b-z5mnf 1/1 Running 0 8s replicaset-demo-9wqj9 1/1 Running 0 100m replicaset-demo-j75hk 1/1 Running 0 126m replicaset-demo-k2n9g 1/1 Running 0 123m replicaset-demo-n7fmk 1/1 Running 0 123m replicaset-demo-q4dc6 1/1 Running 0 123m replicaset-demo-rsl7q 1/1 Running 0 159m replicaset-demo-twknl 1/1 Running 0 159m [root@master01 ~]#
查看更新程序
[root@master01 ~]# kubectl get pod -w NAME READY STATUS RESTARTS AGE deploy-demo-6d795f958b-5bdfw 1/1 Running 0 5m18s deploy-demo-6d795f958b-5zr7r 1/1 Running 0 113s deploy-demo-6d795f958b-9mc7k 1/1 Running 0 113s deploy-demo-6d795f958b-czwdp 1/1 Running 0 5m18s deploy-demo-6d795f958b-jfrnc 1/1 Running 0 113s deploy-demo-6d795f958b-jw9n8 1/1 Running 0 5m18s deploy-demo-6d795f958b-mbrlw 1/1 Running 0 113s deploy-demo-6d795f958b-ph99t 1/1 Running 0 113s deploy-demo-6d795f958b-wzscg 1/1 Running 0 113s deploy-demo-6d795f958b-z5mnf 1/1 Running 0 113s replicaset-demo-9wqj9 1/1 Running 0 102m replicaset-demo-j75hk 1/1 Running 0 128m replicaset-demo-k2n9g 1/1 Running 0 125m replicaset-demo-n7fmk 1/1 Running 0 125m replicaset-demo-q4dc6 1/1 Running 0 125m replicaset-demo-rsl7q 1/1 Running 0 161m replicaset-demo-twknl 1/1 Running 0 161m deploy-demo-578d6b6f94-qhc9j 0/1 Pending 0 0s deploy-demo-578d6b6f94-qhc9j 0/1 Pending 0 0s deploy-demo-578d6b6f94-95srs 0/1 Pending 0 0s deploy-demo-6d795f958b-mbrlw 1/1 Terminating 0 4m16s deploy-demo-578d6b6f94-95srs 0/1 Pending 0 0s deploy-demo-578d6b6f94-qhc9j 0/1 ContainerCreating 0 0s deploy-demo-578d6b6f94-95srs 0/1 ContainerCreating 0 0s deploy-demo-578d6b6f94-bht84 0/1 Pending 0 0s deploy-demo-578d6b6f94-bht84 0/1 Pending 0 0s deploy-demo-578d6b6f94-bht84 0/1 ContainerCreating 0 0s deploy-demo-6d795f958b-mbrlw 0/1 Terminating 0 4m17s deploy-demo-6d795f958b-mbrlw 0/1 Terminating 0 4m24s deploy-demo-6d795f958b-mbrlw 0/1 Terminating 0 4m24s deploy-demo-578d6b6f94-qhc9j 1/1 Running 0 15s deploy-demo-578d6b6f94-95srs 1/1 Running 0 16s deploy-demo-578d6b6f94-bht84 1/1 Running 0 18s deploy-demo-6d795f958b-ph99t 1/1 Terminating 0 4m38s deploy-demo-6d795f958b-jfrnc 1/1 Terminating 0 4m38s deploy-demo-578d6b6f94-lg6vk 0/1 Pending 0 0s deploy-demo-578d6b6f94-g9c8x 0/1 Pending 0 0s deploy-demo-578d6b6f94-lg6vk 0/1 Pending 0 0s deploy-demo-578d6b6f94-g9c8x 0/1 Pending 0 0s deploy-demo-578d6b6f94-lg6vk 0/1 ContainerCreating 0 0s deploy-demo-578d6b6f94-g9c8x 0/1 ContainerCreating 0 0s deploy-demo-6d795f958b-ph99t 0/1 Terminating 0 4m38s deploy-demo-6d795f958b-jfrnc 0/1 Terminating 0 4m38s deploy-demo-6d795f958b-5zr7r 1/1 Terminating 0 4m43s deploy-demo-578d6b6f94-4rpx9 0/1 Pending 0 0s deploy-demo-578d6b6f94-4rpx9 0/1 Pending 0 0s deploy-demo-578d6b6f94-4rpx9 0/1 ContainerCreating 0 0s deploy-demo-6d795f958b-5zr7r 0/1 Terminating 0 4m43s deploy-demo-6d795f958b-ph99t 0/1 Terminating 0 4m44s deploy-demo-6d795f958b-ph99t 0/1 Terminating 0 4m44s deploy-demo-6d795f958b-jfrnc 0/1 Terminating 0 4m44s deploy-demo-6d795f958b-jfrnc 0/1 Terminating 0 4m44s deploy-demo-578d6b6f94-g9c8x 1/1 Running 0 12s deploy-demo-6d795f958b-5zr7r 0/1 Terminating 0 4m51s deploy-demo-6d795f958b-5zr7r 0/1 Terminating 0 4m51s deploy-demo-578d6b6f94-lg6vk 1/1 Running 0 15s deploy-demo-6d795f958b-9mc7k 1/1 Terminating 0 4m56s deploy-demo-578d6b6f94-4lbwg 0/1 Pending 0 0s deploy-demo-578d6b6f94-4lbwg 0/1 Pending 0 0s deploy-demo-578d6b6f94-4lbwg 0/1 ContainerCreating 0 0s deploy-demo-578d6b6f94-4rpx9 1/1 Running 0 13s deploy-demo-6d795f958b-9mc7k 0/1 Terminating 0 4m57s deploy-demo-578d6b6f94-4lbwg 1/1 Running 0 2s deploy-demo-6d795f958b-wzscg 1/1 Terminating 0 4m58s deploy-demo-578d6b6f94-fhkk9 0/1 Pending 0 0s deploy-demo-578d6b6f94-fhkk9 0/1 Pending 0 0s deploy-demo-578d6b6f94-fhkk9 0/1 ContainerCreating 0 0s deploy-demo-6d795f958b-wzscg 0/1 Terminating 0 4m59s deploy-demo-578d6b6f94-fhkk9 1/1 Running 0 2s deploy-demo-6d795f958b-z5mnf 1/1 Terminating 0 5m2s deploy-demo-578d6b6f94-sfpz4 0/1 Pending 0 1s deploy-demo-578d6b6f94-sfpz4 0/1 Pending 0 1s deploy-demo-6d795f958b-czwdp 1/1 Terminating 0 8m28s deploy-demo-578d6b6f94-sfpz4 0/1 ContainerCreating 0 1s deploy-demo-578d6b6f94-5bs6z 0/1 Pending 0 0s deploy-demo-578d6b6f94-5bs6z 0/1 Pending 0 0s deploy-demo-578d6b6f94-5bs6z 0/1 ContainerCreating 0 0s deploy-demo-6d795f958b-czwdp 0/1 Terminating 0 8m28s deploy-demo-6d795f958b-z5mnf 0/1 Terminating 0 5m4s deploy-demo-578d6b6f94-sfpz4 1/1 Running 0 2s deploy-demo-6d795f958b-5bdfw 1/1 Terminating 0 8m29s deploy-demo-6d795f958b-9mc7k 0/1 Terminating 0 5m4s deploy-demo-6d795f958b-9mc7k 0/1 Terminating 0 5m4s deploy-demo-578d6b6f94-5bs6z 1/1 Running 0 1s deploy-demo-6d795f958b-5bdfw 0/1 Terminating 0 8m30s deploy-demo-6d795f958b-czwdp 0/1 Terminating 0 8m36s deploy-demo-6d795f958b-czwdp 0/1 Terminating 0 8m36s deploy-demo-6d795f958b-5bdfw 0/1 Terminating 0 8m36s deploy-demo-6d795f958b-5bdfw 0/1 Terminating 0 8m36s deploy-demo-6d795f958b-wzscg 0/1 Terminating 0 5m11s deploy-demo-6d795f958b-wzscg 0/1 Terminating 0 5m11s deploy-demo-6d795f958b-jw9n8 1/1 Terminating 0 8m38s deploy-demo-6d795f958b-jw9n8 0/1 Terminating 0 8m38s deploy-demo-6d795f958b-z5mnf 0/1 Terminating 0 5m14s deploy-demo-6d795f958b-z5mnf 0/1 Terminating 0 5m14s deploy-demo-6d795f958b-jw9n8 0/1 Terminating 0 8m46s deploy-demo-6d795f958b-jw9n8 0/1 Terminating 0 8m46s
提示：使用-w選項可以一直跟蹤查看pod變化程序；從上面的監控資訊可以看到，在更新時，首先是將三個pod標記為pending狀態，然后先洗掉一個pod，然后再創建兩個pod；然后又創建一個，再洗掉3個，一次進行；不管怎么洗掉和新建，對應新舊pod的數量最少要有9個，最大不超過12個；
使用暫停更新實作金絲雀發布
[root@master01 ~]# kubectl set image deploy/deploy-demo nginx=nginx:1.14-alpine && kubectl rollout pause deploy/deploy-demo deployment.apps/deploy-demo image updated deployment.apps/deploy-demo paused [root@master01 ~]#
提示：以上命令會根據我們定義的更新策略，先洗掉一個pod，然后再創建3個新版pod，然后更新操作就暫停了；此時對應pod只更新了1個，然后新建了2個新pod，總共就有12個pod；
查看pod情況
[root@master01 ~]# kubectl get pod NAME READY STATUS RESTARTS AGE deploy-demo-6d795f958b-df77k 1/1 Running 0 87s deploy-demo-6d795f958b-tll8b 1/1 Running 0 87s deploy-demo-6d795f958b-zbhwp 1/1 Running 0 87s deploy-demo-fb957b9b-44l6g 1/1 Running 0 3m21s deploy-demo-fb957b9b-7q6wh 1/1 Running 0 3m38s deploy-demo-fb957b9b-d45rg 1/1 Running 0 3m27s deploy-demo-fb957b9b-j7p2j 1/1 Running 0 3m38s deploy-demo-fb957b9b-mkpz6 1/1 Running 0 3m38s deploy-demo-fb957b9b-qctnv 1/1 Running 0 3m21s deploy-demo-fb957b9b-rvrtf 1/1 Running 0 3m27s deploy-demo-fb957b9b-wf254 1/1 Running 0 3m12s deploy-demo-fb957b9b-xclhz 1/1 Running 0 3m22s replicaset-demo-9wqj9 1/1 Running 0 135m replicaset-demo-j75hk 1/1 Running 0 161m replicaset-demo-k2n9g 1/1 Running 0 158m replicaset-demo-n7fmk 1/1 Running 0 158m replicaset-demo-q4dc6 1/1 Running 0 158m replicaset-demo-rsl7q 1/1 Running 0 3h14m replicaset-demo-twknl 1/1 Running 0 3h14m [root@master01 ~]# kubectl get pod|grep "^deploy.*" |wc -l 12 [root@master01 ~]#
提示：之所以多兩個是因為我們在更新策略中定義允許最大超出用戶期望2個pod；
恢復更新
[root@master01 ~]# kubectl rollout resume deploy/deploy-demo && kubectl rollout status deploy/deploy-demo deployment.apps/deploy-demo resumed Waiting for deployment "deploy-demo" rollout to finish: 3 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 6 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 6 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 6 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 6 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 6 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 6 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 out of 10 new replicas have been updated... Waiting for deployment "deploy-demo" rollout to finish: 9 of 10 updated replicas are available... Waiting for deployment "deploy-demo" rollout to finish: 9 of 10 updated replicas are available... deployment "deploy-demo" successfully rolled out [root@master01 ~]#
提示：resume表示恢復剛才暫停的更新操作；status是用來查看對應更新程序；
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