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collect.go
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collect.go
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package collect
import (
"context"
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/pkg/errors"
troubleshootv1beta2 "github.com/replicatedhq/troubleshoot/pkg/apis/troubleshoot/v1beta2"
"k8s.io/client-go/rest"
)
var (
// ErrCollectorNotFound is returned when an undefined host collector is
// specified by the user.
ErrHostCollectorNotFound = errors.New("unrecognized host collector")
ErrInsufficientPermissionsToRun = errors.New("insufficient permissions to run all collectors")
)
type CollectorRunOpts struct {
Namespace string
CollectWithoutPermissions bool
HttpClient *http.Client
KubernetesRestConfig *rest.Config
Image string
PullPolicy string
LabelSelector string
Timeout time.Duration
ProgressChan chan interface{}
}
type CollectProgress struct {
CurrentName string
CurrentStatus string
CompletedCount int
TotalCount int
}
type HostCollectResult struct {
AllCollectedData map[string][]byte
Collectors []HostCollector
Spec *troubleshootv1beta2.HostCollector
}
type RemoteCollectResult struct {
AllCollectedData map[string][]byte
Collectors RemoteCollectors
Spec *troubleshootv1beta2.RemoteCollector
isRBACAllowed bool
}
// CollectHost runs the collection phase for a local collector.
func CollectHost(c *troubleshootv1beta2.HostCollector, additionalRedactors *troubleshootv1beta2.Redactor, opts CollectorRunOpts) (*HostCollectResult, error) {
allCollectedData := make(map[string][]byte)
var collectors []HostCollector
for _, desiredCollector := range c.Spec.Collectors {
collector, ok := GetHostCollector(desiredCollector, "")
if !ok {
return nil, ErrHostCollectorNotFound
}
collectors = append(collectors, collector)
}
collectResult := &HostCollectResult{
Collectors: collectors,
Spec: c,
}
for _, collector := range collectors {
isExcluded, _ := collector.IsExcluded()
if isExcluded {
opts.ProgressChan <- fmt.Sprintf("[%s] Excluding collector", collector.Title())
continue
}
opts.ProgressChan <- fmt.Sprintf("[%s] Running collector...", collector.Title())
result, err := collector.Collect(opts.ProgressChan)
if err != nil {
opts.ProgressChan <- errors.Errorf("failed to run collector: %s: %v", collector.Title(), err)
}
for k, v := range result {
allCollectedData[k] = v
}
}
collectResult.AllCollectedData = allCollectedData
return collectResult, nil
}
// CollectRemote runs the collection phase for a remote collector.
func CollectRemote(c *troubleshootv1beta2.RemoteCollector, additionalRedactors *troubleshootv1beta2.Redactor, opts CollectorRunOpts) (*RemoteCollectResult, error) {
allCollectedData := make(map[string][]byte)
var collectors RemoteCollectors
for _, desiredCollector := range c.Spec.Collectors {
collector := RemoteCollector{
Redact: true,
Collect: desiredCollector,
ClientConfig: opts.KubernetesRestConfig,
Image: opts.Image,
PullPolicy: opts.PullPolicy,
LabelSelector: opts.LabelSelector,
Namespace: opts.Namespace,
Timeout: opts.Timeout,
}
collectors = append(collectors, &collector)
}
collectResult := &RemoteCollectResult{
Collectors: collectors,
Spec: c,
}
if err := collectors.CheckRBAC(context.Background()); err != nil {
return collectResult, errors.Wrap(err, "failed to check RBAC for collectors")
}
foundForbidden := false
for _, c := range collectors {
for _, e := range c.RBACErrors {
foundForbidden = true
opts.ProgressChan <- e
}
}
if foundForbidden && !opts.CollectWithoutPermissions {
collectResult.isRBACAllowed = false
return collectResult, ErrInsufficientPermissionsToRun
}
// Run collectors synchronously.
for i, collector := range collectors {
opts.ProgressChan <- CollectProgress{
CurrentName: collector.GetDisplayName(),
CurrentStatus: "running",
CompletedCount: i,
TotalCount: len(collectors),
}
result, err := collector.RunCollectorSync(nil)
if err != nil {
opts.ProgressChan <- errors.Errorf("failed to run collector %s: %v\n", collector.GetDisplayName(), err)
opts.ProgressChan <- CollectProgress{
CurrentName: collector.GetDisplayName(),
CurrentStatus: "failed",
CompletedCount: i + 1,
TotalCount: len(collectors),
}
continue
}
opts.ProgressChan <- CollectProgress{
CurrentName: collector.GetDisplayName(),
CurrentStatus: "completed",
CompletedCount: i + 1,
TotalCount: len(collectors),
}
for k, v := range result {
if curBytes, ok := allCollectedData[k]; ok {
var curResults map[string]string
if err := json.Unmarshal(curBytes, &curResults); err != nil {
opts.ProgressChan <- errors.Errorf("failed to read existing results for collector %s: %v\n", collector.GetDisplayName(), err)
continue
}
var newResults map[string]string
if err := json.Unmarshal(v, &newResults); err != nil {
opts.ProgressChan <- errors.Errorf("failed to read new results for collector %s: %v\n", collector.GetDisplayName(), err)
continue
}
for file, data := range newResults {
curResults[file] = data
}
combinedResults, err := json.Marshal(curResults)
if err != nil {
opts.ProgressChan <- errors.Errorf("failed to combine results for collector %s: %v\n", collector.GetDisplayName(), err)
continue
}
allCollectedData[k] = combinedResults
} else {
allCollectedData[k] = v
}
}
}
collectResult.AllCollectedData = allCollectedData
return collectResult, nil
}