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moby--moby/daemon/logger/context.go
Philip Monroe 3be7146e14 log driver - add ability to interpolate container context into the log tag field
Signed-off-by: Philip Monroe <phil@philmonroe.com>
2015-09-16 15:19:28 -07:00

72 lines
1.7 KiB
Go

package logger
import (
"fmt"
"os"
"strings"
"time"
)
// Context provides enough information for a logging driver to do its function.
type Context struct {
Config map[string]string
ContainerID string
ContainerName string
ContainerEntrypoint string
ContainerArgs []string
ContainerImageID string
ContainerImageName string
ContainerCreated time.Time
LogPath string
}
// Hostname returns the hostname from the underlying OS.
func (ctx *Context) Hostname() (string, error) {
hostname, err := os.Hostname()
if err != nil {
return "", fmt.Errorf("logger: can not resolve hostname: %v", err)
}
return hostname, nil
}
// Command returns the command that the container being logged was
// started with. The Entrypoint is prepended to the container
// arguments.
func (ctx *Context) Command() string {
terms := []string{ctx.ContainerEntrypoint}
for _, arg := range ctx.ContainerArgs {
terms = append(terms, arg)
}
command := strings.Join(terms, " ")
return command
}
// ID Returns the Container ID shortened to 12 characters.
func (ctx *Context) ID() string {
return ctx.ContainerID[:12]
}
// FullID is an alias of ContainerID.
func (ctx *Context) FullID() string {
return ctx.ContainerID
}
// Name returns the ContainerName without a preceding '/'.
func (ctx *Context) Name() string {
return ctx.ContainerName[1:]
}
// ImageID returns the ContainerImageID shortened to 12 characters.
func (ctx *Context) ImageID() string {
return ctx.ContainerImageID[:12]
}
// ImageFullID is an alias of ContainerID.
func (ctx *Context) ImageFullID() string {
return ctx.ContainerImageID
}
// ImageName is an alias of ContainerImageName
func (ctx *Context) ImageName() string {
return ctx.ContainerImageName
}