We want to stop leaking more docker details into kubelet, and we also want to
consolidate some of the existing docker interfaces/structs. This change creates
DockerManager as the new home of some functions in dockertools/docker.go. It
also absorbs containerRunner. In addition, GetDockerPodStatus is renamed to
GetPodStatus with the entire pod passed to it so that it is simialr to the what
is defined in the container Runtime interface.
Eventually, DockerManager should implement the container Runtime interface, and
integrate DockerCache with a flag to turn on/off caching. Code in kubelet.go
should not be using docker client directly.
This fixes TestSyncPodsDeletesWithNoPodInfraContainer.
Since we need to sync two pods in parallel, we should not verify
the docker calls in strict order.
Functions Build/ParseDockerName now work with struct instead of the long
list of arguments. This new struct also was reused in the kubelet.go
instead of auxilary podContainer struct.
There are two main goals for this change.
1. Fix the naming scheme in kubelet so that it accepts DNS subdomain
name/namespaces correctly (#4920). The design is discussed in #3453.
2. Prepare for syncing the static pods back to the apiserver(#4090). This
includes
- Eliminate the source component in the internal full pod name (#4922). Pods
no longer need sources as they will all be sync'd via apiserver.
- Changing the naming scheme for the static (file-, http-, and etcd-based)
pods such that they are distinguishable when syncing back to the apiserver.
The changes includes:
* name = <pod.Name>-<hostname>
* namespace = <cluster_namespace> (i.e. "default" for now).
* container_name = k8s_<contianer_name>.<hash_of_container>_<pod_name>_<namespace>_<uid>_<random>
Note that this is not backward-compatible, meaning the kubelet won't recognize
existing running containers using the old naming scheme.
to create and start a fake container. When StartContainer, it pass a name as docker
ID for testing purpose, but leave Name uninitialized. This PR fixes such issue.
Fixed#4472.
Since the parsing function doesn't return an error all the components
returned empty strings. This caused us to enforce the MaxContainerLimit
as a global limit instead of a per-container limit.
Fixes#4413.
Sometimes for external applications it is important to identify
exactly what images are running. Since tags can be moved to point
to newer builds this information can be used to identify old images
running.
Signed-off-by: Federico Simoncelli <fsimonce@redhat.com>
Yu-Ju Hong