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Container logs are persisted on disk

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This commit is contained in:
Solomon Hykes 2013-03-06 16:08:44 -08:00
parent 007c57deba
commit 2df0bc6bc0
1 changed files with 42 additions and 13 deletions
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55
container.go
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@ -1,7 +1,6 @@
package docker
import (
"bytes"
"encoding/json"
"errors"
"github.com/kr/pty"
@ -12,7 +11,6 @@ import (
"os/exec"
"path"
"strconv"
"strings"
"syscall"
"time"
)
@ -48,8 +46,8 @@ type Container struct {
stdin io.ReadCloser
stdinPipe io.WriteCloser
stdoutLog *bytes.Buffer
stderrLog *bytes.Buffer
stdoutLog *os.File
stderrLog *os.File
}
type Config struct {
@ -84,8 +82,20 @@ func createContainer(id string, root string, command string, args []string, laye
lxcConfigPath: path.Join(root, "config.lxc"),
stdout: newWriteBroadcaster(),
stderr: newWriteBroadcaster(),
stdoutLog: new(bytes.Buffer),
stderrLog: new(bytes.Buffer),
}
if err := os.Mkdir(root, 0700); err != nil {
return nil, err
}
// Setup logging of stdout and stderr to disk
if stdoutLog, err := os.OpenFile(path.Join(container.Root, id+"-stdout.log"), os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600); err != nil {
return nil, err
} else {
container.stdoutLog = stdoutLog
}
if stderrLog, err := os.OpenFile(path.Join(container.Root, id+"-stderr.log"), os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600); err != nil {
return nil, err
} else {
container.stderrLog = stderrLog
}
if container.Config.OpenStdin {
container.stdin, container.stdinPipe = io.Pipe()
@ -95,9 +105,6 @@ func createContainer(id string, root string, command string, args []string, laye
container.stdout.AddWriter(NopWriteCloser(container.stdoutLog))
container.stderr.AddWriter(NopWriteCloser(container.stderrLog))
if err := os.Mkdir(root, 0700); err != nil {
return nil, err
}
if err := container.Filesystem.createMountPoints(); err != nil {
return nil, err
}
@ -115,15 +122,29 @@ func loadContainer(containerPath string, netManager *NetworkManager) (*Container
container := &Container{
stdout: newWriteBroadcaster(),
stderr: newWriteBroadcaster(),
stdoutLog: new(bytes.Buffer),
stderrLog: new(bytes.Buffer),
lxcConfigPath: path.Join(containerPath, "config.lxc"),
networkManager: netManager,
NetworkSettings: &NetworkSettings{},
}
// Load container settings
if err := json.Unmarshal(data, container); err != nil {
return nil, err
}
// Setup logging of stdout and stderr to disk
if stdoutLog, err := os.OpenFile(path.Join(container.Root, container.Id+"-stdout.log"), os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600); err != nil {
return nil, err
} else {
container.stdoutLog = stdoutLog
}
if stderrLog, err := os.OpenFile(path.Join(container.Root, container.Id+"-stderr.log"), os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600); err != nil {
return nil, err
} else {
container.stderrLog = stderrLog
}
container.stdout.AddWriter(NopWriteCloser(container.stdoutLog))
container.stderr.AddWriter(NopWriteCloser(container.stderrLog))
// Create mountpoints
if err := container.Filesystem.createMountPoints(); err != nil {
return nil, err
}
@ -357,7 +378,11 @@ func (container *Container) StdoutPipe() (io.ReadCloser, error) {
}
func (container *Container) StdoutLog() io.Reader {
return strings.NewReader(container.stdoutLog.String())
r, err := os.Open(container.stdoutLog.Name())
if err != nil {
return nil
}
return r
}
func (container *Container) StderrPipe() (io.ReadCloser, error) {
@ -367,7 +392,11 @@ func (container *Container) StderrPipe() (io.ReadCloser, error) {
}
func (container *Container) StderrLog() io.Reader {
return strings.NewReader(container.stderrLog.String())
r, err := os.Open(container.stderrLog.Name())
if err != nil {
return nil
}
return r
}
func (container *Container) allocateNetwork() error {