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package system
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"strconv"
"time"
"github.com/containers/podman/v2/libpod/define"
"github.com/containers/podman/v2/pkg/bindings"
"github.com/containers/podman/v2/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// Events allows you to monitor libdpod related events like container creation and
// removal. The events are then passed to the eventChan provided. The optional cancelChan
// can be used to cancel the read of events and close down the HTTP connection.
func Events(ctx context.Context, eventChan chan entities.Event, cancelChan chan bool, since, until *string, filters map[string][]string, stream *bool) error {
conn, err := bindings.GetClient(ctx)
if err != nil {
return err
}
params := url.Values{}
if since != nil {
params.Set("since", *since)
}
if until != nil {
params.Set("until", *until)
}
if stream != nil {
params.Set("stream", strconv.FormatBool(*stream))
}
if filters != nil {
filterString, err := bindings.FiltersToString(filters)
if err != nil {
return errors.Wrap(err, "invalid filters")
}
params.Set("filters", filterString)
}
response, err := conn.DoRequest(nil, http.MethodGet, "/events", params, nil)
if err != nil {
return err
}
if cancelChan != nil {
go func() {
<-cancelChan
err = response.Body.Close()
logrus.Error(errors.Wrap(err, "unable to close event response body"))
}()
}
dec := json.NewDecoder(response.Body)
for err = (error)(nil); err == nil; {
var e = entities.Event{}
err = dec.Decode(&e)
if err == nil {
eventChan <- e
}
}
close(eventChan)
switch {
case err == nil:
return nil
case errors.Is(err, io.EOF):
return nil
default:
return errors.Wrap(err, "unable to decode event response")
}
}
// Prune removes all unused system data.
func Prune(ctx context.Context, all, volumes *bool) (*entities.SystemPruneReport, error) {
var (
report entities.SystemPruneReport
)
conn, err := bindings.GetClient(ctx)
if err != nil {
return nil, err
}
params := url.Values{}
if all != nil {
params.Set("All", strconv.FormatBool(*all))
}
if volumes != nil {
params.Set("Volumes", strconv.FormatBool(*volumes))
}
response, err := conn.DoRequest(nil, http.MethodPost, "/system/prune", params, nil)
if err != nil {
return nil, err
}
return &report, response.Process(&report)
}
func Version(ctx context.Context) (*entities.SystemVersionReport, error) {
var report entities.SystemVersionReport
var component entities.ComponentVersion
version, err := define.GetVersion()
if err != nil {
return nil, err
}
report.Client = &version
conn, err := bindings.GetClient(ctx)
if err != nil {
return nil, err
}
response, err := conn.DoRequest(nil, http.MethodGet, "/version", nil, nil)
if err != nil {
return nil, err
}
if err = response.Process(&component); err != nil {
return nil, err
}
b, _ := time.Parse(time.RFC3339, component.BuildTime)
report.Server = &define.Version{
APIVersion: component.APIVersion,
Version: component.Version.Version,
GoVersion: component.GoVersion,
GitCommit: component.GitCommit,
BuiltTime: time.Unix(b.Unix(), 0).Format(time.ANSIC),
Built: b.Unix(),
OsArch: fmt.Sprintf("%s/%s", component.Os, component.Arch),
}
for _, c := range component.Components {
if c.Name == "Podman Engine" {
report.Server.APIVersion = c.Details["APIVersion"]
}
}
return &report, err
}
// DiskUsage returns information about image, container, and volume disk
// consumption
func DiskUsage(ctx context.Context) (*entities.SystemDfReport, error) {
var report entities.SystemDfReport
conn, err := bindings.GetClient(ctx)
if err != nil {
return nil, err
}
response, err := conn.DoRequest(nil, http.MethodGet, "/system/df", nil, nil)
if err != nil {
return nil, err
}
return &report, response.Process(&report)
}
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