我正在使用follwing命令使用kompose将docker-compose文件转换为kubernetes：
$ kompose convert -f docker-compose.yml -o kubernetes_image.yaml
命令完成后，输出如下。
WARN Volume mount on the host "/usr/docker/adpater/dbdata" isn't supported - ignoring path on the host
INFO Network integration is detected at Source, shall be converted to equivalent NetworkPolicy at Destination
WARN Volume mount on the host "/usr/docker/adpater/license.json" isn't supported - ignoring path on the host
WARN Volume mount on the host "/usr/docker/adpater/certificates/ssl.crt" isn't supported - ignoring path on the host
WARN Volume mount on the host "/usr/docker/adpater/certificates/ssl.key" isn't supported - ignoring path on the host
WARN Volume mount on the host "/usr/docker/adpater/server.xml" isn't supported - ignoring path on the host
INFO Network integration is detected at Source, shall be converted to equivalent NetworkPolicy at Destination
要将转换后的文件推送到kubernetes，我运行以下命令：
$ kubectl apply -f kubernetes_image.yaml
NAME READY STATUS RESTARTS AGE
mysql-557dd849c8-bsdq7 1/1 Running 1 17h
tomcat-7cd65d4556-spjbl 0/1 CrashLoopBackOff 76 18h
如果我运行： $ kubectl描述pod tomcat-7cd65d4556-spjbl 我收到以下消息：
Last State: Terminated
Reason: ContainerCannotRun
Message: OCI runtime create failed: container_linux.go:349: starting container process caused "process_linux.go:449: container init caused \"rootfs_linux.go:58: mounting \\\"/usr/docker/adapter/server.xml\\\" to rootfs \\\"/var/lib/docker/overlay2/a6df90a0ef4cbe8b2a3fa5352be5f304cd7b648fb1381492308f0a7fceb931cc/merged\\\" at \\\"/var/lib/docker/overlay2/a6df90a0ef4cbe8b2a3fa5352be5f304cd7b648fb1381492308f0a7fceb931cc/merged/usr/local/tomcat/conf/server.xml\\\" caused \\\"not a directory\\\"\"": unknown: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type
Exit Code: 127
Started: Sun, 31 May 2020 13:35:00 +0100
Finished: Sun, 31 May 2020 13:35:00 +0100
Ready: False
Restart Count: 75
Environment: <none>
Mounts:
/run/secrets/rji_license.json from tomcat-hostpath0 (rw)
/usr/local/tomcat/conf/server.xml from tomcat-hostpath3 (rw)
/usr/local/tomcat/conf/ssl.crt from tomcat-hostpath1 (rw)
/usr/local/tomcat/conf/ssl.key from tomcat-hostpath2 (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-8dhnk (ro)
这是我的docker-compose.yml文件：
version: '3.6'
networks:
integration:
services:
mysql:
environment:
MYSQL_USER: 'integrationdb'
MYSQL_PASSWORD: 'password'
MYSQL_ROOT_PASSWORD: 'password'
image: db:poc
networks:
- integration
ports:
- '3306:3306'
restart: always
volumes:
- ./dbdata:/var/lib/mysql
tomcat:
image: adapter:poc
networks:
- integration
ports:
- '8080:8080'
- '8443:8443'
restart: always
volumes:
- ./license.json:/run/secrets/rji_license.json
- ./certificates/ssl.crt:/usr/local/tomcat/conf/ssl.crt
- ./certificates/ssl.key:/usr/local/tomcat/conf/ssl.key
- ./server.xml:/usr/local/tomcat/conf/server.xml
工具版本：
kompose: 1.21.0 (992df58d8)
docker: 19.03.9
kubectl:Major:"1", Minor:"18"
我认为我的挑战是在这种类型的卷或文件中，我不知道如何将它们迁移或转换为kubernetes，并使tomcat pod运行正常。 有人可以帮我吗？
volumes:
- ./license.json:/run/secrets/rji_license.json
- ./certificates/ssl.crt:/usr/local/tomcat/conf/ssl.crt
- ./certificates/ssl.key:/usr/local/tomcat/conf/ssl.key
- ./server.xml:/usr/local/tomcat/conf/server.xml
提前谢谢。
答案 0 :(得分：3)
当Kompose警告您时：
WARN Volume mount on the host "/usr/docker/adpater/license.json" isn't supported - ignoring path on the host
这意味着它无法将docker-compose.yml文件的此片段转换为Kubernetes语法：
volumes:
- ./license.json:/run/secrets/rji_license.json
在本地Kubernetes中，您需要在ConfigMap或Secret对象中提供此内容，然后在mount the file into the pod中提供。您不能直接从要启动容器的系统上访问内容。
在这里不能真正直接使用Kubernetes YAML文件。您可以运行kompose convert来生成框架文件，但是您需要对其进行编辑以添加ConfigMap，PersistentVolumeClaims（用于数据库存储）以及相关的卷和装载声明，然后运行{{1}实际运行它们。我将把Kubernetes YAML文件检查到源代码管理中，并与Docker Compose设置并行进行维护。
答案 1 :(得分：0)
Move2Kube（确实支持docker-compose翻译），可以处理这种情况并尝试通过与您进行交互来转换卷。
? 6. [] What type of container registry login do you want to use?
Hints:
[Docker login from config mode, will use the default config from your local machine.]
No authentication
? 7. Do you want to create PVC for host path [/Users/ashok/wksps/hc/temp/test2/src/dbdata]?:
Hints:
[Use PVC for persistent storage wherever applicable]
Yes
? 8. Do you want to create PVC for host path [/Users/ashok/wksps/hc/temp/test2/src/license.json]?:
Hints:
[Use PVC for persistent storage wherever applicable]
No
? 9. Do you want to create PVC for host path [/Users/ashok/wksps/hc/temp/test2/src/certificates/ssl.crt]?:
Hints:
[Use PVC for persistent storage wherever applicable]
No
? 10. Do you want to create PVC for host path [/Users/ashok/wksps/hc/temp/test2/src/certificates/ssl.key]?:
Hints:
[Use PVC for persistent storage wherever applicable]
No
? 11. Do you want to create PVC for host path [/Users/ashok/wksps/hc/temp/test2/src/server.xml]?:
Hints:
[Use PVC for persistent storage wherever applicable]
No
? 12. Which storage class to use for persistent volume claim [vol17655897939759777588] used by [mysql]
Hints:
[If you have a custom cluster, you can use collect to get storage classes from it.]
default
? 13. Provide the ingress host domain
Hints:
[Ingress host domain is part of service URL]
myproject.com
? 14. Provide the TLS secret for ingress
Hints:
[Enter TLS secret name]
如果做出以上选择，Move2Kube将创建以下工件：
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
move2kube.konveyor.io/service.expose: "true"
creationTimestamp: null
labels:
move2kube.konveyor.io/network/integration: "true"
move2kube.konveyor.io/service: tomcat
name: tomcat
spec:
replicas: 2
selector:
matchLabels:
move2kube.konveyor.io/service: tomcat
strategy: {}
template:
metadata:
annotations:
move2kube.konveyor.io/service.expose: "true"
creationTimestamp: null
labels:
move2kube.konveyor.io/network/integration: "true"
move2kube.konveyor.io/service: tomcat
name: tomcat
spec:
containers:
- image: adapter:poc
imagePullPolicy: Always
name: tomcat
ports:
- containerPort: 8080
protocol: TCP
- containerPort: 8443
protocol: TCP
resources: {}
volumeMounts:
- mountPath: /run/secrets/rji_license.json
name: vol16871681589659214643
- mountPath: /usr/local/tomcat/conf/ssl.crt
name: vol12635587774184387470
- mountPath: /usr/local/tomcat/conf/ssl.key
name: vol7446232639477381794
- mountPath: /usr/local/tomcat/conf/server.xml
name: vol4920239289720818926
restartPolicy: Always
volumes:
- hostPath:
path: /Users/ashok/wksps/hc/temp/test2/src/license.json
name: vol16871681589659214643
- hostPath:
path: /Users/ashok/wksps/hc/temp/test2/src/certificates/ssl.crt
name: vol12635587774184387470
- hostPath:
path: /Users/ashok/wksps/hc/temp/test2/src/certificates/ssl.key
name: vol7446232639477381794
- hostPath:
path: /Users/ashok/wksps/hc/temp/test2/src/server.xml
name: vol4920239289720818926
status: {}
和
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
move2kube.konveyor.io/service.expose: "true"
creationTimestamp: null
labels:
move2kube.konveyor.io/network/integration: "true"
move2kube.konveyor.io/service: mysql
name: mysql
spec:
replicas: 2
selector:
matchLabels:
move2kube.konveyor.io/service: mysql
strategy: {}
template:
metadata:
annotations:
move2kube.konveyor.io/service.expose: "true"
creationTimestamp: null
labels:
move2kube.konveyor.io/network/integration: "true"
move2kube.konveyor.io/service: mysql
name: mysql
spec:
containers:
- env:
- name: MYSQL_USER
value: integrationdb
- name: MYSQL_PASSWORD
value: password
- name: MYSQL_ROOT_PASSWORD
value: password
image: db:poc
imagePullPolicy: Always
name: mysql
ports:
- containerPort: 3306
protocol: TCP
resources: {}
volumeMounts:
- mountPath: /var/lib/mysql
name: vol17655897939759777588
restartPolicy: Always
volumes:
- name: vol17655897939759777588
persistentVolumeClaim:
claimName: vol17655897939759777588
status: {}
和
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
creationTimestamp: null
name: vol17655897939759777588
spec:
resources:
requests:
storage: 100Mi
storageClassName: default
volumeName: vol17655897939759777588
status: {}
基本上取决于您的选择，Move2Kube将为您创建适当的工件。
您可以在https://konveyor.github.io/move2kube/tutorials/docker-compose/中查看其工作原理。