mirror of
https://github.com/containers/podman.git
synced 2025-09-27 00:34:32 +08:00
b5f54a9b23
podman machine allows podman to create, manage, and interact with a vm running some form of linux (default is fcos). podman is then configured to be able to interact with the vm automatically. while this is usable on linux, the real push is to get this working on both current apple architectures in macos. Ashley Cui contributed to this PR and was a great help. [NO TESTS NEEDED] Signed-off-by: baude <bbaude@redhat.com>
108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
// Copyright 2016 The go-qemu Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package qmp
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import (
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"context"
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"encoding/json"
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"net"
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"github.com/digitalocean/go-libvirt"
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)
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var _ Monitor = &LibvirtRPCMonitor{}
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// A LibvirtRPCMonitor implements LibVirt's remote procedure call protocol.
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type LibvirtRPCMonitor struct {
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l *libvirt.Libvirt
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// Domain name as seen by libvirt, e.g., stage-lb-1
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Domain string
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}
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// NewLibvirtRPCMonitor configures a new Libvirt RPC Monitor connection.
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// The provided domain should be the name of the domain as seen
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// by libvirt, e.g., stage-lb-1.
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func NewLibvirtRPCMonitor(domain string, conn net.Conn) *LibvirtRPCMonitor {
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l := libvirt.New(conn)
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return &LibvirtRPCMonitor{
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l: l,
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Domain: domain,
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}
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}
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// Connect establishes communication with the libvirt server.
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// The underlying libvirt socket connection must be previously established.
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func (rpc *LibvirtRPCMonitor) Connect() error {
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return rpc.l.Connect()
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}
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// Disconnect shuts down communication with the libvirt server
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// and closes the underlying net.Conn.
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func (rpc *LibvirtRPCMonitor) Disconnect() error {
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return rpc.l.Disconnect()
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}
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// Events streams QEMU QMP Events until the provided context is cancelled.
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// If a problem is encountered setting up the event monitor connection
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// an error will be returned. Errors encountered during streaming will
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// cause the returned event channel to be closed.
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func (rpc *LibvirtRPCMonitor) Events(ctx context.Context) (<-chan Event, error) {
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events, err := rpc.l.SubscribeQEMUEvents(ctx, rpc.Domain)
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if err != nil {
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return nil, err
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}
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c := make(chan Event)
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go func() {
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// process events
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for e := range events {
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qe, err := qmpEvent(&e)
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if err != nil {
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close(c)
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break
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}
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c <- *qe
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}
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}()
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return c, nil
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}
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// Run executes the given QAPI command against a domain's QEMU instance.
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// For a list of available QAPI commands, see:
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// http://git.qemu.org/?p=qemu.git;a=blob;f=qapi-schema.json;hb=HEAD
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func (rpc *LibvirtRPCMonitor) Run(cmd []byte) ([]byte, error) {
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return rpc.l.Run(rpc.Domain, cmd)
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}
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// qmpEvent takes a libvirt DomainEvent and returns the QMP equivalent.
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func qmpEvent(e *libvirt.DomainEvent) (*Event, error) {
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var qe Event
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if e.Details != nil {
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if err := json.Unmarshal(e.Details, &qe.Data); err != nil {
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return nil, err
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}
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}
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qe.Event = e.Event
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qe.Timestamp.Seconds = int64(e.Seconds)
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qe.Timestamp.Microseconds = int64(e.Microseconds)
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return &qe, nil
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}
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