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logs.go
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logs.go
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package cmd
import (
"fmt"
"strconv"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
boshuuid "github.com/cloudfoundry/bosh-utils/uuid"
boshdir "github.com/cloudfoundry/bosh-cli/director"
boshssh "github.com/cloudfoundry/bosh-cli/ssh"
)
type LogsCmd struct {
deployment boshdir.Deployment
downloader Downloader
uuidGen boshuuid.Generator
nonIntSSHRunner boshssh.Runner
}
func NewLogsCmd(
deployment boshdir.Deployment,
downloader Downloader,
uuidGen boshuuid.Generator,
nonIntSSHRunner boshssh.Runner,
) LogsCmd {
return LogsCmd{
deployment: deployment,
downloader: downloader,
uuidGen: uuidGen,
nonIntSSHRunner: nonIntSSHRunner,
}
}
func (c LogsCmd) Run(opts LogsOpts) error {
if opts.Follow || opts.Num > 0 {
return c.tail(opts)
}
return c.fetch(opts)
}
func (c LogsCmd) tail(opts LogsOpts) error {
sshOpts, connOpts, err := opts.GatewayFlags.AsSSHOpts()
if err != nil {
return err
}
result, err := c.deployment.SetUpSSH(opts.Args.Slug, sshOpts)
if err != nil {
return err
}
defer func() {
_ = c.deployment.CleanUpSSH(opts.Args.Slug, sshOpts)
}()
err = c.nonIntSSHRunner.Run(connOpts, result, c.buildTailCmd(opts))
if err != nil {
return bosherr.WrapErrorf(err, "Running follow over non-interactive SSH")
}
return nil
}
func (c LogsCmd) buildTailCmd(opts LogsOpts) []string {
cmd := []string{"sudo", "tail"}
if opts.Follow {
// -F for continuing to follow after renames
cmd = append(cmd, "-F")
}
if opts.Num > 0 {
cmd = append(cmd, "-n", strconv.Itoa(opts.Num))
}
if opts.Quiet {
cmd = append(cmd, "-q")
}
var logsDir string
if opts.Agent {
logsDir = "/var/vcap/bosh/log"
} else {
logsDir = "/var/vcap/sys/log"
}
if len(opts.Jobs) > 0 {
for _, job := range opts.Jobs {
cmd = append(cmd, fmt.Sprintf("%s/%s/*.log", logsDir, job))
}
} else if len(opts.Filters) > 0 {
for _, filter := range opts.Filters {
cmd = append(cmd, fmt.Sprintf("%s/%s", logsDir, filter))
}
} else {
// includes only directory and its subdirectories
cmd = append(cmd, fmt.Sprintf("%s/{**/,}*.log", logsDir))
}
return cmd
}
func (c LogsCmd) fetch(opts LogsOpts) error {
slug := opts.Args.Slug
name := c.deployment.Name()
if len(slug.Name()) > 0 {
name += "." + slug.Name()
}
if len(slug.IndexOrID()) > 0 {
name += "." + slug.IndexOrID()
}
result, err := c.deployment.FetchLogs(slug, opts.Filters, opts.Agent)
if err != nil {
return err
}
err = c.downloader.Download(
result.BlobstoreID,
result.SHA1,
name,
opts.Directory.Path,
)
if err != nil {
return bosherr.WrapError(err, "Downloading logs")
}
return nil
}