我正在嘗試在 azure 託管的 kubernetes 叢集(aks)內的 docker 場景中執行 docker
我已將 docker unix 套接字安裝到 pod 上。我的目的是使用 aks pod 作為 azure devops 代理來建置和測試我的專案。這需要一個資料庫和一個在 docker 中運行的wiremock,這意味著它將創建 docker 網絡
下面你可以看到我目前的配置:
Name: my-devopsagent-javaagent-64855bb796-smpkz
Namespace: my-devops-agents
Priority: 0
Node: aks-default-21935887-vmss000000/10.128.0.4
Start Time: Mon, 16 Dec 2019 14:09:04 +0200
Labels: app=my-devopsagent-javaagent
pod-template-hash=64855bb796
Annotations: <none>
Status: Running
IP: 10.128.0.28
IPs: <none>
Controlled By: ReplicaSet/my-devopsagent-javaagent-64855bb796
Containers:
my-devopsagent-javaagent:
Container ID: docker://ffffff26c3b4a92678a95f446c0ada685986f30c56138109b080
Image: mycontainerregistry.azurecr.io/mycompany/devopsagent/javaagent:latest
Image ID: docker-pullable://mycontainerregistry.azurecr.io/mycompany/devopsagent/javaagent@sha256:4422edb12d1b4bbff92bc36e7d33715222daab6ef3439cfffffff
Port: <none>
Host Port: <none>
State: Running
Started: Mon, 16 Dec 2019 14:09:06 +0200
Ready: True
Restart Count: 0
Environment:
AZP_AGENT_NAME: CONTAINER_JAVA_AGENT
AZP_URL: https://dev.azure.com/mycompany
AZP_POOL: Default
AZP_TOKEN: <set to the key 'pat' in secret 'pat'> Optional: false
Mounts:
/var/run/docker.sock from dockersock (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-2msgf (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
dockersock:
Type: HostPath (bare host directory volume)
Path: /var/run/docker.sock
HostPathType:
default-token-2msgf:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-2msgf
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events: <none>
我收到的錯誤是
ERRO[0000] 'overlay' is not supported over overlayfs
error creating libpod runtime: 'overlay' is not supported over overlayfs: backing file system is unsupported for this graph driver
關於如何解決這個問題有什麼想法嗎?
PS我也嘗試了第一個評論碼頭工人中的碼頭工人問題,這意味著我嘗試掛載 /bin/docker ,這引入了不同的問題
答案1
要在docker中執行docker,/var/lib/docker
檔案系統不能是使用overlayfs建置的容器檔案系統。xfs
相反,您必須使用ftype=1
或,將其從外部磁碟區裝載到外部主機上受支援的檔案系統ext4
。這記錄在https://docs.docker.com/storage/storagedriver/#supported-backing-filesystems
為此,您可以在主機上使用命名卷,因為主機檔案系統上的 /var/lib/docker 將位於受支援的 FS 上。例如,我自己的 DinD CLI 如下所示:
docker run -d --rm --privileged \
-v "dind-${port}:/var/lib/docker" \
-v "dind-${port}-ccerts:/certs/client" -e DOCKER_TLS_CERTDIR=/certs \
-v "$HOME:$HOME" \
--name "dind-${port}" -p "127.0.0.1:${port}:2376" \
"docker:${opt_t}-dind"
請注意,第一個磁碟區掛載類似於dind-1234:/var/lib/docker
為容器中的該目錄建立命名磁碟區。