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Add event logging to libpod, even display to podman

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In lipod, we now log major events that occurr.  These events
can be displayed using the `podman events` command. Each
event contains:

* Type (container, image, volume, pod...)
* Status (create, rm, stop, kill, ....)
* Timestamp in RFC3339Nano format
* Name (if applicable)
* Image (if applicable)

The format of the event and the varlink endpoint are to not
be considered stable until cockpit has done its enablement.

Signed-off-by: baude <bbaude@redhat.com>
This commit is contained in:
baude
2019-02-28 14:15:56 -06:00
parent 6421208e0f
commit ca1e76ff63
33 changed files with 1173 additions and 64 deletions
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16
libpod/runtime.go
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@ -223,6 +223,9 @@ type RuntimeConfig struct {
// NumLocks is the number of locks to make available for containers and
// pods.
NumLocks uint32 `toml:"num_locks,omitempty"`
// EventsLogFilePath is where the events log is stored.
EventsLogFilePath string `toml:-"events_logfile_path"`
}
// runtimeConfiguredFrom is a struct used during early runtime init to help
@ -459,7 +462,6 @@ func NewRuntime(options ...RuntimeOption) (runtime *Runtime, err error) {
}
}
}
return runtime, nil
}
@ -535,6 +537,7 @@ func NewRuntimeFromConfig(configPath string, options ...RuntimeOption) (runtime
// Make a new runtime based on the given configuration
// Sets up containers/storage, state store, OCI runtime
func makeRuntime(runtime *Runtime) (err error) {
runtime.config.EventsLogFilePath = filepath.Join(runtime.config.TmpDir, "events", "events.log")
// Backward compatibility for `runtime_path`
if runtime.config.RuntimePath != nil {
@ -736,6 +739,9 @@ func makeRuntime(runtime *Runtime) (err error) {
// Setting signaturepolicypath
ir.SignaturePolicyPath = runtime.config.SignaturePolicyPath
// Set logfile path for events
ir.EventsLogFilePath = runtime.config.EventsLogFilePath
defer func() {
if err != nil && store != nil {
// Don't forcibly shut down
@ -768,6 +774,14 @@ func makeRuntime(runtime *Runtime) (err error) {
}
}
// Create events log dir
if err := os.MkdirAll(filepath.Dir(runtime.config.EventsLogFilePath), 0700); err != nil {
// The directory is allowed to exist
if !os.IsExist(err) {
return errors.Wrapf(err, "error creating events dirs %s", filepath.Dir(runtime.config.EventsLogFilePath))
}
}
// Make an OCI runtime to perform container operations
ociRuntime, err := newOCIRuntime(runtime.ociRuntimePath,
runtime.conmonPath, runtime.config.ConmonEnvVars,