Question

我想使用单个awk命令在Kubernetes部署中修补所有容器模板，而无需知道其名称。这可能吗？

我知道我可以通过sed，jq，kubectl replace和[*]完成替换，但我更喜欢kubectl patch deployment mydeployment -p '{"spec":{"template":{"spec":{"containers":[{"name":"myname","imagePullPolicy":"Always"}]}}}}'之类的内容。表达......

针对特定容器规范的修补程序命令

apiVersion: extensions/v1beta1
kind: Deployment
spec:
  replicas: 1
  template:
    spec:
      containers:
      - image: example.com/my/fancyimage:latest
        imagePullPolicy: Never
        name: myname
      dnsPolicy: ClusterFirst
      restartPolicy: Always

示例部署

Dim RowNdx As Integer
Dim ColNdx As Integer
Dim TempVal As String
Dim WholeLine As String
Dim Pos As Integer
Dim NextPos As Long
Dim SaveColNdx As Integer
Dim SaveRowNdx As Long
Dim FoundData As Boolean
Dim NumberOfData As Long

FName = "E:\zdump\"
MyFile = Dir(FName & "*.txt")
Sep = vbLf

ColNdx = ActiveCell.Column
RowNdx = ActiveCell.Row
SaveRowNdx = RowNdx

Do While MyFile <> ""
    Open (FName & MyFile) For Input As #1

    While Not EOF(1)
        Line Input #1, WholeLine

        If Right(WholeLine, 1) <> Sep Then
            WholeLine = WholeLine & Sep
        End If
        Pos = 1
        NextPos = InStr(Pos, WholeLine, Sep)
        While NextPos >= 1
            TempVal = Mid(WholeLine, Pos, NextPos - Pos)

            If FoundData = False Then
                If InStr(TempVal, "CELL_DATA") Then
                    NumberOfData = Val(Right(TempVal, Len(TempVal) - Len(Left(TempVal, Len("CELL_DATA") + 1))))
                End If

                If InStr(TempVal, "LOOKUP_TABLE default") <> 0 Then
                    FoundData = True
                End If

                Pos = NextPos + 1
                NextPos = InStr(Pos, WholeLine, Sep)
            Else
                If NumberOfData <> 0 Then
                    Cells(RowNdx, ColNdx).Value = TempVal
                    Pos = NextPos + 1
                    RowNdx = RowNdx + 1
                    NextPos = InStr(Pos, WholeLine, Sep)
                    NumberOfData = NumberOfData - 1
                End If
            End If
        Wend

    Wend
    Close #1
    FoundData = False
    ColNdx = ColNdx + 1
    Cells(SaveRowNdx, ColNdx).Activate
    RowNdx = SaveRowNdx
    MyFile = Dir()
    'Debug.Print Text
Loop

Answer 1

这不完全是你问的，因为我在这里使用命令行工具，但如果它出现在这里，它会节省我一些时间。所以我把它发布给其他来自搜索引擎的人。

kubectl \
  --username=USERNAME \
  --password=PASSWORD \
  --server="https://EXAMPLE.COM" \
  --insecure-skip-tls-verify=true \
  --namespace=MY_NAMESPACE \
  get deployments | \
  grep -v NAME | cut -f1 -d" " | \
  xargs kubectl \
    --username=USERNAME \
    --password=PASSWORD \
    --server="https://EXAMPLE.COM" \
    --insecure-skip-tls-verify=true \
    --namespace=MY_NAMESPACE \
    patch deployment \
      -p='{"spec":{"template":{"spec":{"containers":[{"name":"myname","imagePullPolicy":"Always"}]}}}}'

Answer 2

假设您希望这是一个持续的要求，那么达到此目的的最佳实践方法是使用AlwaysPullImages AdmissionController

AlwaysPullImages

此准入控制器修改每个新的Pod，以将图片提取策略强制设置为“始终...”。

您可以通过将其附加到--enable-admission-plugins参数上来将其应用于api控制器

`kubectl patch`数组的每个元素

2 个答案: