Co-authored-by: Thorsten Klein <iwilltry42@gmail.com>
@iwilltry42 pointed out that currnet error path calls os.Exit(1), which
does follow the normal CLI framework. This patch implements this
suggestion.
Add a closure fucntion deleteCluster() to reduce code duplication.
When creating clusters with the --auto-restart flag, any running cluster
will remain "running" up on docker daemon restart.
By default, without this flag, a "running" cluster becomes "stopped"
after docker daemon restart.
Clusters stopped with 'k3d stop' command will remain stopped after
docker daemon restart regardless the settings of this flag.
Before this commit, when creating a cluster was not successful, some
resource may be lingering behind. This commit fixes those cases.
Now the cluster creation model is easier to understand. Either a cluster
is successfully created, or all resources created will be cleaned up.
The intention is to keep the "atomic create" model going forward for
k3d.
Current SRC definition only picks up main.go, not all golang source code
of the project. Fix so that 'make fmt" and 'make simplify' can work as
expected.
Thanks @zeerorg for the suggestion on possible container volume leak.
With out this fix the k3s container volumes are left in the reclaimable
state. This experiment confirms it:
$ docker system df
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 14 0 2.131GB 2.131GB (100%)
Containers 0 0 0B 0B
Local Volumes 0 0 0B 0B
Build Cache 0 0 0B 0B
$ bin/k3d create; sleep 5; bin/k3d delete
$ docker system df
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 14 0 2.131GB 2.131GB (100%)
Containers 0 0 0B 0B
Local Volumes 3 0 2.366MB 2.366MB (100%)
Build Cache 0 0 0B 0B
In this case, 2.36MB are left in the reclaimable state. This number can be
larger with a larger cluster.
With this fix, output of "docker system df" does not contain the
claimable volume
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 14 0 2.131GB 2.131GB (100%)
Containers 0 0 0B 0B
Local Volumes 0 0 0B 0B
Build Cache 0 0 0B 0B
This change improve the error message. It also avoids the tricky situation of
potentially destroying an existing clusters when the same name cluster
creation fails. For more details see issue #42.
Most k3d arguments are using in "stringSlice" style, allowing the
argument to supplied multiple times. Currently "volume" is an exception
to this style, require multiple arguments to be supplied in a single
argument, separated by comma.
This commit improve the k3d usability by improve the consistency of its
argument style.
Before this change, k3d list stopped cluster as "exited", This patch
change it to "stopped".
$ k3d create -n test
$ k3d stop -n test
$ k3d list --all
+------+------------------------------+--------+---------+
| NAME | IMAGE | STATUS | WORKERS |
+------+------------------------------+--------+---------+
| test | docker.io/rancher/k3s:v0.5.0 | exited | 0/0 |
+------+------------------------------+--------+---------+
Before this change, k3d report the server status as the cluster status.
This commit output the server status if the server and all worker
containers status agree. Otherwise, the cluster status is reported as "unhealthy".
$ k3d create --workers 2
$ docker ps -a
d14135f5929c rancher/k3s:v0.5.0 "/bin/k3s agent" 6 seconds ago Up 5 seconds k3d-k3s-default-worker-1
612d71f3ec23 rancher/k3s:v0.5.0 "/bin/k3s agent" 6 seconds ago Up 5 seconds k3d-k3s-default-worker-0
7f201731bf45 rancher/k3s:v0.5.0 "/bin/k3s server --h…" 7 seconds ago Up 6 seconds 0.0.0.0:6443->6443/tcp k3d-k3s-default-server
$ docker stop d14135f5929c
$ bin/k3d list --all
+-------------+------------------------------+-----------+---------+
| NAME | IMAGE | STATUS | WORKERS |
+-------------+------------------------------+-----------+---------+
| k3s-default | docker.io/rancher/k3s:v0.5.0 | unhealthy | 1/2 |
+-------------+------------------------------+-----------+---------+
Before this patch:
$ k3d create
$ k3d stop
$ k3d list
+------+-------+--------+---------+
| NAME | IMAGE | STATUS | WORKERS |
+------+-------+--------+---------+
+------+-------+--------+---------+
This commit omits such empty table.
