Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

logcli: Add retries to unsuccessful log queries #3879

Merged
merged 2 commits into from
Jun 24, 2021
Merged

logcli: Add retries to unsuccessful log queries #3879

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
02caa5a
Add retries to unsuccessfull log queries.
vyzigold Jun 22, 2021
98a3361
Differentiate between query attempts and retries
vyzigold Jun 24, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions cmd/logcli/main.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -211,6 +211,7 @@ func newQueryClient(app *kingpin.Application) client.Client {
app.Flag("org-id", "adds X-Scope-OrgID to API requests for representing tenant ID. Useful for requesting tenant data when bypassing an auth gateway.").Default("").Envar("LOKI_ORG_ID").StringVar(&client.OrgID)
app.Flag("bearer-token", "adds the Authorization header to API requests for authentication purposes. Can also be set using LOKI_BEARER_TOKEN env var.").Default("").Envar("LOKI_BEARER_TOKEN").StringVar(&client.BearerToken)
app.Flag("bearer-token-file", "adds the Authorization header to API requests for authentication purposes. Can also be set using LOKI_BEARER_TOKEN_FILE env var.").Default("").Envar("LOKI_BEARER_TOKEN_FILE").StringVar(&client.BearerTokenFile)
app.Flag("retries", "How many times to retry each query when getting an error response from Loki. Can also be set using LOKI_CLIENT_RETRIES").Default("0").Envar("LOKI_CLIENT_RETRIES").IntVar(&client.Retries)

return client
}
Expand Down
37 changes: 28 additions & 9 deletions pkg/logcli/client/client.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,7 @@ type DefaultClient struct {
Tripperware Tripperware
BearerToken string
BearerTokenFile string
Retries int
}

// Query uses the /api/v1/query endpoint to execute an instant query
Expand Down Expand Up @@ -216,21 +217,39 @@ func (c *DefaultClient) doRequest(path, query string, quiet bool, out interface{
if c.Tripperware != nil {
client.Transport = c.Tripperware(client.Transport)
}
resp, err := client.Do(req)
if err != nil {
return err

var resp *http.Response
attempts := c.Retries + 1
success := false

for attempts > 0 {
attempts--

resp, err = client.Do(req)
if err != nil {
log.Println("error sending request", err)
continue
}
if resp.StatusCode/100 != 2 {
buf, _ := ioutil.ReadAll(resp.Body) // nolint
log.Printf("Error response from server: %s (%v) attempts remaining: %d", string(buf), err, attempts)
if err := resp.Body.Close(); err != nil {
log.Println("error closing body", err)
}
continue
}
success = true
break
}
if !success {
return fmt.Errorf("Run out of attempts while querying the server")
}

defer func() {
if err := resp.Body.Close(); err != nil {
log.Println("error closing body", err)
}
}()

if resp.StatusCode/100 != 2 {
buf, _ := ioutil.ReadAll(resp.Body) // nolint
return fmt.Errorf("Error response from server: %s (%v)", string(buf), err)
}

return json.NewDecoder(resp.Body).Decode(out)
}

Expand Down