forked from LaconicNetwork/kompose
30736a3973
* Support file based secret * Fix issue about read-only volume path and add support to absolute path at long-syntax
97 lines
18 KiB
Markdown
97 lines
18 KiB
Markdown
# Conversion Matrix
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This document outlines all possible conversion details regarding `docker-compose.yaml` values to Kubernetes / OpenShift artifacts. This covers *major* versions of Docker Compose such as 1, 2 and 3.
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The current table covers all **current** possible Docker Compose keys.
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__Note:__ We don't support anything 3.4 and above at the moment.
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__Glossary:__
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- __✓:__ Converts
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- __-:__ Not in this Docker Compose Version
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- __n:__ Not yet implemented
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- __x:__ Not applicable / no 1-1 conversion
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| Keys | V1 | V2 | V3 | Kubernetes / OpenShift | Notes |
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|------------------------|----|----|----|-------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------|
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| build | ✓ | ✓ | ✓ | | Builds/Pushes to Docker repository. See `--build` parameter |
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| build: context | ✓ | ✓ | ✓ | | |
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| build: dockerfile | ✓ | ✓ | ✓ | | |
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| build: args | n | n | n | | |
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| build: cache_from | - | - | n | | |
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| cap_add, cap_drop | ✓ | ✓ | ✓ | Pod.Spec.Container.SecurityContext.Capabilities.Add/Drop | |
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| command | ✓ | ✓ | ✓ | Pod.Spec.Container.Command | |
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| configs | n | n | ✓ | | |
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| configs: short-syntax | n | n | n | | Only create configMap |
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| configs: long-syntax | n | n | ✓ | | If target path is /, ignore this and only create configMap |
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| cgroup_parent | x | x | x | | Not supported within Kubernetes. See issue https://github.com/kubernetes/kubernetes/issues/11986 |
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| container_name | ✓ | ✓ | ✓ | Metadata.Name + Deployment.Spec.Containers.Name | |
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| credential_spec | x | x | x | | Only applicable to Windows containers |
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| deploy | - | - | ✓ | | |
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| deploy: mode | - | - | ✓ | | |
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| deploy: replicas | - | - | ✓ | Deployment.Spec.Replicas / DeploymentConfig.Spec.Replicas | |
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| deploy: placement | - | - | ✓ | Pod.Spec.NodeSelector | |
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| deploy: update_config | - | - | n | | |
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| deploy: resources | - | - | ✓ | Containers.Resources.Limits.Memory / Containers.Resources.Limits.CPU | Support for memory as well as cpu |
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| deploy: restart_policy | - | - | ✓ | Pod generation | This generated a Pod, see the [user guide on restart](http://kompose.io/user-guide/#restart) |
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| deploy: labels | - | - | n | | |
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| devices | x | x | x | | Not supported within Kubernetes, See issue https://github.com/kubernetes/kubernetes/issues/5607 |
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| depends_on | x | x | x | | |
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| dns | x | x | x | | Not used within Kubernetes. Kubernetes uses a managed DNS server |
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| dns_search | x | x | x | | See `dns` key |
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| domainname | ✓ | ✓ | ✓ | Pod.Spec.SubDomain |
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| tmpfs | ✓ | ✓ | ✓ | Pod.Spec.Containers.Volumes.EmptyDir | Creates emptyDirvolume with medium set to Memory & mounts given directory inside container |
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| entrypoint | ✓ | ✓ | ✓ | Pod.Spec.Container.Command | Same as command |
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| env_file | n | n | ✓ | | |
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| environment | ✓ | ✓ | ✓ | Pod.Spec.Container.Env | |
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| expose | ✓ | ✓ | ✓ | Service.Spec.Ports
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| endpoint_mode | n | n | ✓ | | If endpoint_mode=vip, the created Service will be forced to set to NodePort type |
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| extends | ✓ | ✓ | ✓ | | Extends by utilizing the same image supplied |
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| external_links | x | x | x | | Kubernetes uses a flat-structure for all containers and thus external_links does not have a 1-1 conversion |
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| extra_hosts | n | n | n | | |
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| group_add | ✓ | ✓ | ✓ | | |
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| healthcheck | - | n | ✓ | | |
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| hostname | ✓ | ✓ | ✓ | Pod.Spec.HostName | |
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| image | ✓ | ✓ | ✓ | Deployment.Spec.Containers.Image | |
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| isolation | x | x | x | | Not applicable as this applies to Windows with HyperV support |
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| labels | ✓ | ✓ | ✓ | Metadata.Annotations | |
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| links | x | x | x | | All containers in the same pod are accessible in Kubernetes |
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| logging | x | x | x | | Kubernetes has built-in logging support at the node-level |
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| network_mode | x | x | x | | Kubernetes uses its own cluster networking |
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| networks | ✓ | ✓ | ✓ | | See `networks` key |
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| networks: aliases | x | x | x | | See `networks` key |
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| networks: addresses | x | x | x | | See `networks` key |
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| pid | ✓ | ✓ | ✓ | Pod.Spec.HostPID | |
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| ports | ✓ | ✓ | ✓ | Service.Spec.Ports | |
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| ports: short-syntax | ✓ | ✓ | ✓ | Service.Spec.Ports | |
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| ports: long-syntax | - | - | ✓ | Service.Spec.Ports | |
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| secrets | - | - | ✓ | Secret | External Secret is not Supported |
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| secrets: short-syntax | - | - | ✓ | Secret | External Secret is not Supported |
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| secrets: long-syntax | - | - | ✓ | Secret | External Secret is not Supported |
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| security_opt | x | x | x | | Kubernetes uses its own container naming scheme |
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| stop_grace_period | ✓ | ✓ | ✓ | Pod.Spec.TerminationGracePeriodSeconds | |
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| stop_signal | x | x | x | | Not supported within Kubernetes. See issue https://github.com/kubernetes/kubernetes/issues/30051 |
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| sysctls | n | n | n | | |
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| ulimits | x | x | x | | Not supported within Kubernetes. See issue https://github.com/kubernetes/kubernetes/issues/3595 |
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| userns_mode | x | x | x | | Not supported within Kubernetes and ignored in Docker Compose Version 3 |
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| volumes | ✓ | ✓ | ✓ | PersistentVolumeClaim | Creates a PersistentVolumeClaim. Can only be created if there is already a PersistentVolume within the cluster |
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| volumes: short-syntax | ✓ | ✓ | ✓ | PersistentVolumeClaim | Creates a PersistentVolumeClaim. Can only be created if there is already a PersistentVolume within the cluster |
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| volumes: long-syntax | - | - | ✓ | PersistentVolumeClaim | Creates a PersistentVolumeClaim. Can only be created if there is already a PersistentVolume within the cluster |
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| restart | ✓ | ✓ | ✓ | | |
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| __Volume__ | x | x | x | | |
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| driver | x | x | x | | |
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| driver_opts | x | x | x | | |
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| external | x | x | x | | |
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| labels | x | x | x | | |
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| __Network__ | x | x | x | | |
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| driver | x | x | x | | |
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| driver_opts | x | x | x | | |
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| enable_ipv6 | x | x | x | | |
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| ipam | x | x | x | | |
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| internal | x | x | x | | |
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| labels | x | x | x | | |
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| external | x | x | x | | |
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