fleet/server/webhooks/failing_policies.go
2022-10-08 08:57:46 -04:00

97 lines
2.6 KiB
Go

package webhooks
import (
"context"
"net/url"
"path"
"sort"
"strconv"
"time"
"github.com/fleetdm/fleet/v4/server"
"github.com/fleetdm/fleet/v4/server/contexts/ctxerr"
"github.com/fleetdm/fleet/v4/server/fleet"
kitlog "github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
)
// SendFailingPoliciesBatchedPOSTs sends a failing policy to the provided
// webhook URL. It sends in batches if hostBatchSize > 0. After a successful
// send, the corresponding hosts are removed from the failing policies set.
func SendFailingPoliciesBatchedPOSTs(
ctx context.Context,
policy *fleet.Policy,
failingPoliciesSet fleet.FailingPolicySet,
hostBatchSize int,
serverURL *url.URL,
webhookURL *url.URL,
now time.Time,
logger kitlog.Logger,
) error {
hosts, err := failingPoliciesSet.ListHosts(policy.ID)
if err != nil {
return ctxerr.Wrapf(ctx, err, "listing hosts for failing policies set %d", policy.ID)
}
if len(hosts) == 0 {
level.Debug(logger).Log("msg", "no hosts", "policyID", policy.ID)
return nil
}
sort.Slice(hosts, func(i, j int) bool {
return hosts[i].ID < hosts[j].ID
})
if hostBatchSize == 0 {
hostBatchSize = len(hosts)
}
for i := 0; i < len(hosts); i += hostBatchSize {
end := i + hostBatchSize
if end > len(hosts) {
end = len(hosts)
}
batch := hosts[i:end]
failingHosts := make([]failingHost, len(batch))
for i, host := range batch {
failingHosts[i] = makeFailingHost(host, serverURL)
}
payload := failingPoliciesPayload{
Timestamp: now,
Policy: policy,
FailingHosts: failingHosts,
}
level.Debug(logger).Log("payload", payload, "url", webhookURL.String(), "batch", len(batch))
if err := server.PostJSONWithTimeout(ctx, webhookURL.String(), &payload); err != nil {
return ctxerr.Wrapf(ctx, err, "posting to %q", webhookURL)
}
if err := failingPoliciesSet.RemoveHosts(policy.ID, batch); err != nil {
return ctxerr.Wrapf(ctx, err, "removing hosts %+v from failing policies set %d", batch, policy.ID)
}
}
return nil
}
type failingPoliciesPayload struct {
Timestamp time.Time `json:"timestamp"`
Policy *fleet.Policy `json:"policy"`
FailingHosts []failingHost `json:"hosts"`
}
type failingHost struct {
ID uint `json:"id"`
Hostname string `json:"hostname"`
DisplayName string `json:"display_name"`
URL string `json:"url"`
}
func makeFailingHost(host fleet.PolicySetHost, serverURL *url.URL) failingHost {
u := *serverURL
u.Path = path.Join(serverURL.Path, "hosts", strconv.FormatUint(uint64(host.ID), 10))
return failingHost{
ID: host.ID,
Hostname: host.Hostname,
DisplayName: host.DisplayName,
URL: u.String(),
}
}