The expectation on older kernels (< 3.19) was to have the network
namespace always be a directory. This is not true if the network
namespace is bind mounted to a file, and will make the plugin fail
erroneously in such cases. The fix is to remove this assumption
completely and just do a basic check on the file system types being
returned.
Fixes #288
Add a namespace object interface for somewhat cleaner code when
creating and switching between network namespaces. All created
namespaces are now mounted in /var/run/netns to ensure they
have persistent inodes and paths that can be passed around
between plugin components without relying on the current namespace
being correct.
Also remove the thread-locking arguments from the ns package
per https://github.com/appc/cni/issues/183 by doing all the namespace
changes in a separate goroutine that locks/unlocks itself, instead of
the caller having to track OS thread locking.
Previously this code used a run-time map lookup keyed by
runtime.GOOS/GOARCH. This version uses conditional compilation to make
this choice at compile time, giving immediate feedback for unsupported
platforms.
/proc/self/ns/net gives the main thread's namespace, not necessarily
the namespace of the thread that's running the testcases. This causes
sporadic failures of the tests.
For example, with a testcase reading inodes after switching netns:
/proc/27686/task/27689/ns/net 4026532565
/proc/self/ns/net 4026531969
/proc/27686/task/27689/ns/net 4026532565
See also:
008d17ae00
Running Suite: pkg/ns Suite
===========================
Random Seed: 1459953577
Will run 6 of 6 specs
• Failure [0.028 seconds]
Linux namespace operations
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:167
WithNetNS
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:166
executes the callback within the target network namespace [It]
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:97
Expected
<uint64>: 4026531969
to equal
<uint64>: 4026532565
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:96
------------------------------
•••••
Summarizing 1 Failure:
[Fail] Linux namespace operations WithNetNS [It] executes the callback within the target network namespace
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:96
Ran 6 of 6 Specs in 0.564 seconds
FAIL! -- 5 Passed | 1 Failed | 0 Pending | 0 Skipped --- FAIL: TestNs (0.56s)
FAIL
/proc/self/ns/net gives the main thread's namespace, not necessarily
the namespace of the thread that's running the testcases. This causes
sporadic failures of the tests.
For example, with a testcase reading inodes after switching netns:
/proc/27686/task/27689/ns/net 4026532565
/proc/self/ns/net 4026531969
/proc/27686/task/27689/ns/net 4026532565
See also:
008d17ae00
Running Suite: pkg/ns Suite
===========================
Random Seed: 1459953577
Will run 6 of 6 specs
• Failure [0.028 seconds]
Linux namespace operations
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:167
WithNetNS
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:166
executes the callback within the target network namespace [It]
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:97
Expected
<uint64>: 4026531969
to equal
<uint64>: 4026532565
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:96
------------------------------
•••••
Summarizing 1 Failure:
[Fail] Linux namespace operations WithNetNS [It] executes the callback within the target network namespace
/cni/gopath/src/github.com/appc/cni/pkg/ns/ns_test.go:96
Ran 6 of 6 Specs in 0.564 seconds
FAIL! -- 5 Passed | 1 Failed | 0 Pending | 0 Skipped --- FAIL: TestNs (0.56s)
FAIL
This commit adds a struct type CommonArgs that is to be embedded in
every plugin's argument struct. It contains a field named
"IgnoreUnknown" which will be parsed as a boolean and can be provided to
ignore unknown arguments passed to the plugin.
This is an attempt to testing the PluginMain() function of the skel pkg.
We should be able to do better by using a mockable interface for the
plugins, but this is a start.
