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follwoing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
如果我跑步:$ 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
预先感谢。
当Kompose警告您:
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。
您在这里无法真正直接使用Kubernetes YAML文件。您可以运行kompose convert
生成框架文件,但随后需要对其进行编辑以添加ConfigMaps,PersistentVolumeClaims(用于数据库存储)以及相关的卷和装载声明,然后运行kompose convert
来实际运行他们。我将把Kubernetes YAML文件检查到源代码管理中,并与Docker Compose设置并行维护它们。