567 lines
23 KiB
Go
567 lines
23 KiB
Go
package watchdog
|
||
|
||
import (
|
||
"bufio"
|
||
"context"
|
||
"fmt"
|
||
"os"
|
||
"strconv"
|
||
"strings"
|
||
"syscall"
|
||
"time"
|
||
|
||
"felis.lolicon.best/internal/apis/felis/v1alpha1"
|
||
"felis.lolicon.best/internal/dbbackup"
|
||
"felis.lolicon.best/internal/imagepush"
|
||
"felis.lolicon.best/internal/naming"
|
||
"felis.lolicon.best/internal/offsite"
|
||
"felis.lolicon.best/internal/platform"
|
||
appsv1 "k8s.io/api/apps/v1"
|
||
batchv1 "k8s.io/api/batch/v1"
|
||
corev1 "k8s.io/api/core/v1"
|
||
apierrors "k8s.io/apimachinery/pkg/api/errors"
|
||
"sigs.k8s.io/controller-runtime/pkg/client"
|
||
)
|
||
|
||
// Thresholds. The durations are how long a condition must hold before it is
|
||
// mailed (Finding.For): long enough for a rollout, a restart or an installer
|
||
// run to heal it, short enough that players are not the first to notice.
|
||
const (
|
||
controlPlaneFor = 5 * time.Minute
|
||
systemServerFor = 10 * time.Minute
|
||
failedServerFor = 5 * time.Minute
|
||
nodeNotReadyFor = 5 * time.Minute
|
||
nodePressureFor = 2 * time.Minute
|
||
postgresFor = 3 * time.Minute
|
||
kubeAPIFor = 5 * time.Minute
|
||
backupFor = 10 * time.Minute
|
||
diskLowFor = 15 * time.Minute
|
||
diskCriticalFor = 5 * time.Minute
|
||
memoryLowFor = 15 * time.Minute
|
||
// watchdogFailedFor is five failed runs in a row.
|
||
watchdogFailedFor = 10 * time.Minute
|
||
|
||
// jobFailureWindow is how far back a failed Job is still news.
|
||
jobFailureWindow = 24 * time.Hour
|
||
// maxBackupAge is the daily database backup's deadline: a day plus the
|
||
// timer's randomized delay and a margin.
|
||
maxBackupAge = 26 * time.Hour
|
||
// maxReaperAge is the same for the daily reaper CronJob.
|
||
maxReaperAge = 26 * time.Hour
|
||
// maxScanDBAge is how old the registry's copy of Trivy's vulnerability DB may
|
||
// grow. felis-build-tools.timer refreshes it twice a day and upstream publishes
|
||
// every six hours; three days of failed refreshes means scans are passing
|
||
// images against advisories that are no longer current.
|
||
maxScanDBAge = 72 * time.Hour
|
||
|
||
diskLowRatio = 0.15
|
||
diskCriticalRatio = 0.05
|
||
memoryLowRatio = 0.10
|
||
)
|
||
|
||
// controlDeployments are the control-plane Deployments, with what their outage
|
||
// takes down.
|
||
var controlDeployments = []struct {
|
||
name, impact, impactEN string
|
||
}{
|
||
{platform.PostgresName, "数据库不可用：登录、面板和服务器管理都会失败", "the control-plane database is down: sign-in, the panel and server management fail"},
|
||
{platform.SAAPI, "面板、登录验证和内部接口都不可用", "the panel, sign-in and the internal API are down"},
|
||
{platform.SAOperator, "服务器无法启动、停止或更新状态", "no server can start, stop or report status"},
|
||
{"registry", "游戏镜像拉取和构建都会失败", "game image pulls and builds fail"},
|
||
}
|
||
|
||
// ClusterPrefixes are the keys Cluster.Check produces. When the API server
|
||
// cannot be reached, alerts under them keep their state (Report.Unknown).
|
||
var ClusterPrefixes = []string{"deployment/", "system-server/", "server-failed/", "job-failed/", "reaper-stale", "node/"}
|
||
|
||
// Cluster checks the Kubernetes side: the control plane, the system servers,
|
||
// the fleet, recent Job failures, the reaper's schedule and the nodes.
|
||
type Cluster struct {
|
||
Client client.Client
|
||
ControlNamespace string
|
||
MinecraftNamespace string
|
||
}
|
||
|
||
// Check returns the cluster's findings. An error means the API server could
|
||
// not answer; the caller reports that and treats every cluster check as unknown.
|
||
func (c Cluster) Check(ctx context.Context, now time.Time) ([]Finding, error) {
|
||
var out []Finding
|
||
for _, d := range controlDeployments {
|
||
f, err := c.deployment(ctx, d.name, d.impact, d.impactEN)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
if f != nil {
|
||
out = append(out, *f)
|
||
}
|
||
}
|
||
|
||
var servers v1alpha1.MinecraftServerList
|
||
if err := c.Client.List(ctx, &servers, client.InNamespace(c.MinecraftNamespace)); err != nil {
|
||
return nil, fmt.Errorf("list servers: %w", err)
|
||
}
|
||
for i := range servers.Items {
|
||
if f := serverFinding(&servers.Items[i], c.MinecraftNamespace); f != nil {
|
||
out = append(out, *f)
|
||
}
|
||
}
|
||
|
||
var jobs batchv1.JobList
|
||
if err := c.Client.List(ctx, &jobs, client.InNamespace(c.MinecraftNamespace)); err != nil {
|
||
return nil, fmt.Errorf("list jobs: %w", err)
|
||
}
|
||
for i := range jobs.Items {
|
||
if f := jobFinding(&jobs.Items[i], now); f != nil {
|
||
out = append(out, *f)
|
||
}
|
||
}
|
||
|
||
var cj batchv1.CronJob
|
||
switch err := c.Client.Get(ctx, client.ObjectKey{Namespace: c.MinecraftNamespace, Name: platform.SAReaper}, &cj); {
|
||
case apierrors.IsNotFound(err):
|
||
// Retention is off; there is no reaper to be late.
|
||
case err != nil:
|
||
return nil, fmt.Errorf("get reaper cronjob: %w", err)
|
||
default:
|
||
if f := reaperFinding(&cj, now); f != nil {
|
||
out = append(out, *f)
|
||
}
|
||
}
|
||
|
||
var nodes corev1.NodeList
|
||
if err := c.Client.List(ctx, &nodes); err != nil {
|
||
return nil, fmt.Errorf("list nodes: %w", err)
|
||
}
|
||
for i := range nodes.Items {
|
||
out = append(out, nodeFindings(&nodes.Items[i])...)
|
||
}
|
||
return out, nil
|
||
}
|
||
|
||
func (c Cluster) deployment(ctx context.Context, name, impact, impactEN string) (*Finding, error) {
|
||
var d appsv1.Deployment
|
||
err := c.Client.Get(ctx, client.ObjectKey{Namespace: c.ControlNamespace, Name: name}, &d)
|
||
if apierrors.IsNotFound(err) {
|
||
return &Finding{
|
||
Key: "deployment/" + name, Severity: Critical, For: controlPlaneFor,
|
||
Summary: fmt.Sprintf("控制面组件 %s 不存在：%s", name, impact),
|
||
SummaryEN: fmt.Sprintf("control-plane Deployment %s is missing: %s", name, impactEN),
|
||
Hint: "re-run the installer, or `sudo felis apply`, to recreate it",
|
||
}, nil
|
||
}
|
||
if err != nil {
|
||
return nil, fmt.Errorf("get deployment %s: %w", name, err)
|
||
}
|
||
if d.Status.AvailableReplicas > 0 {
|
||
return nil, nil
|
||
}
|
||
want := int32(1)
|
||
if d.Spec.Replicas != nil {
|
||
want = *d.Spec.Replicas
|
||
}
|
||
return &Finding{
|
||
Key: "deployment/" + name, Severity: Critical, For: controlPlaneFor,
|
||
Summary: fmt.Sprintf("控制面组件 %s 没有可用副本（%d/%d 就绪）：%s", name, d.Status.ReadyReplicas, want, impact),
|
||
SummaryEN: fmt.Sprintf("control-plane Deployment %s has no available replica (%d/%d ready): %s", name, d.Status.ReadyReplicas, want, impactEN),
|
||
Hint: fmt.Sprintf("kubectl -n %s get pods; kubectl -n %s logs deploy/%s --all-containers", c.ControlNamespace, c.ControlNamespace, name),
|
||
}, nil
|
||
}
|
||
|
||
// serverFinding reports a system server that should run and does not, and a
|
||
// user server that failed. A user server that is merely stopped or starting is
|
||
// its owner's business.
|
||
func serverFinding(ms *v1alpha1.MinecraftServer, ns string) *Finding {
|
||
phase := ms.Status.Phase
|
||
if phase == "" {
|
||
phase = v1alpha1.PhaseUnknown
|
||
}
|
||
why := failureMessage(ms)
|
||
if role := ms.Labels[v1alpha1.LabelSystemRole]; role != "" {
|
||
if ms.Spec.DesiredState != v1alpha1.DesiredRunning || phase == v1alpha1.PhaseRunning {
|
||
return nil
|
||
}
|
||
f := &Finding{
|
||
Key: "system-server/" + ms.Name, Severity: Warning, For: systemServerFor,
|
||
Summary: fmt.Sprintf("系统服务器 %s 处于 %s（应为 Running）%s", ms.Name, phase, why),
|
||
SummaryEN: fmt.Sprintf("system server %s is %s, not Running%s", ms.Name, phase, why),
|
||
Hint: fmt.Sprintf("kubectl -n %s describe minecraftserver %s; docs/troubleshooting.md §1-§2", ns, ms.Name),
|
||
}
|
||
if role == naming.SystemLoginServer {
|
||
f.Severity = Critical
|
||
f.Summary = fmt.Sprintf("登录门 %s 处于 %s（应为 Running），玩家无法进服%s", ms.Name, phase, why)
|
||
f.SummaryEN = fmt.Sprintf("login gate %s is %s, not Running: players cannot join%s", ms.Name, phase, why)
|
||
}
|
||
return f
|
||
}
|
||
if phase != v1alpha1.PhaseFailed {
|
||
return nil
|
||
}
|
||
return &Finding{
|
||
Key: "server-failed/" + ms.Name, Severity: Warning, For: failedServerFor,
|
||
Summary: fmt.Sprintf("服务器 %s 启动失败（Failed）%s", ms.Name, why),
|
||
SummaryEN: fmt.Sprintf("server %s is Failed%s", ms.Name, why),
|
||
Hint: fmt.Sprintf("kubectl -n %s describe minecraftserver %s; docs/troubleshooting.md §2", ns, ms.Name),
|
||
}
|
||
}
|
||
|
||
// failureMessage is the first false condition's message, as ": <message>".
|
||
func failureMessage(ms *v1alpha1.MinecraftServer) string {
|
||
for _, c := range ms.Status.Conditions {
|
||
if c.Status == "False" && c.Message != "" {
|
||
return ": " + c.Message
|
||
}
|
||
}
|
||
return ""
|
||
}
|
||
|
||
// jobFinding reports a Job in the minecraft namespace (a world backup, a
|
||
// restore, a reaper run) that failed within jobFailureWindow, once.
|
||
func jobFinding(j *batchv1.Job, now time.Time) *Finding {
|
||
for _, c := range j.Status.Conditions {
|
||
if c.Type != batchv1.JobFailed || c.Status != corev1.ConditionTrue {
|
||
continue
|
||
}
|
||
if now.Sub(c.LastTransitionTime.Time) > jobFailureWindow {
|
||
return nil
|
||
}
|
||
kind, kindEN := "任务", "Job"
|
||
switch {
|
||
case strings.HasPrefix(j.Name, "backup-"):
|
||
kind, kindEN = "世界备份任务", "world backup Job"
|
||
case strings.HasPrefix(j.Name, "restore-"):
|
||
kind, kindEN = "世界恢复任务", "world restore Job"
|
||
case strings.HasPrefix(j.Name, platform.SAReaper+"-"):
|
||
kind, kindEN = "世界回收任务", "world reaper Job"
|
||
}
|
||
reason := ""
|
||
if c.Reason != "" {
|
||
reason = " (" + c.Reason + ")"
|
||
}
|
||
return &Finding{
|
||
Key: "job-failed/" + j.Name, Severity: Warning, Event: true,
|
||
Summary: fmt.Sprintf("%s %s 失败%s", kind, j.Name, reason),
|
||
SummaryEN: fmt.Sprintf("%s %s failed%s", kindEN, j.Name, reason),
|
||
Hint: fmt.Sprintf("kubectl -n %s logs job/%s", j.Namespace, j.Name),
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
// reaperFinding reports a reaper CronJob that has not succeeded for over a day:
|
||
// idle worlds are neither backed up nor released, and expired backups pile up.
|
||
func reaperFinding(cj *batchv1.CronJob, now time.Time) *Finding {
|
||
if cj.Spec.Suspend != nil && *cj.Spec.Suspend {
|
||
return nil
|
||
}
|
||
last := cj.CreationTimestamp.Time
|
||
if cj.Status.LastSuccessfulTime != nil {
|
||
last = cj.Status.LastSuccessfulTime.Time
|
||
}
|
||
if now.Sub(last) <= maxReaperAge {
|
||
return nil
|
||
}
|
||
return &Finding{
|
||
Key: "reaper-stale", Severity: Warning,
|
||
Summary: fmt.Sprintf("世界回收任务已超过 %s 没有成功运行", roundHours(now.Sub(last))),
|
||
SummaryEN: fmt.Sprintf("the world reaper has not succeeded for %s", roundHours(now.Sub(last))),
|
||
Hint: fmt.Sprintf("kubectl -n %s get jobs; docs/troubleshooting.md §10", cj.Namespace),
|
||
}
|
||
}
|
||
|
||
// nodeFindings reports a node that is not Ready or is under pressure: the
|
||
// kubelet is about to evict pods, or already is.
|
||
func nodeFindings(n *corev1.Node) []Finding {
|
||
var out []Finding
|
||
for _, c := range n.Status.Conditions {
|
||
switch {
|
||
case c.Type == corev1.NodeReady && c.Status != corev1.ConditionTrue:
|
||
out = append(out, Finding{
|
||
Key: "node/" + n.Name + "/NotReady", Severity: Critical, For: nodeNotReadyFor,
|
||
Summary: fmt.Sprintf("节点 %s 未就绪：%s", n.Name, c.Message),
|
||
SummaryEN: fmt.Sprintf("node %s is not Ready: %s", n.Name, c.Message),
|
||
Hint: "systemctl status k3s; journalctl -u k3s -n 200",
|
||
})
|
||
case c.Type != corev1.NodeReady && c.Status == corev1.ConditionTrue &&
|
||
(c.Type == corev1.NodeDiskPressure || c.Type == corev1.NodeMemoryPressure || c.Type == corev1.NodePIDPressure):
|
||
out = append(out, Finding{
|
||
Key: "node/" + n.Name + "/" + string(c.Type), Severity: Critical, For: nodePressureFor,
|
||
Summary: fmt.Sprintf("节点 %s 报告 %s，kubelet 正在驱逐 Pod", n.Name, c.Type),
|
||
SummaryEN: fmt.Sprintf("node %s reports %s: the kubelet is evicting pods", n.Name, c.Type),
|
||
Hint: "docs/troubleshooting.md §13b",
|
||
})
|
||
}
|
||
}
|
||
return out
|
||
}
|
||
|
||
// WatchdogFailed is the watchdog's own run failing (felis-watchdog-failed.service,
|
||
// through OnFailure=): while it fails no other check runs and nothing else is
|
||
// mailed. detail is how the run ended. It waits watchdogFailedFor, so one run cut
|
||
// short by a slow host mails nobody.
|
||
func WatchdogFailed(detail string) Finding {
|
||
return Finding{
|
||
Key: "watchdog/run", Severity: Critical, For: watchdogFailedFor,
|
||
Summary: "平台巡检本身运行失败，其他检查都没有执行，出了别的问题也不会有告警：" + detail,
|
||
SummaryEN: "the platform watchdog itself fails, so no other check runs and nothing else is mailed: " + detail,
|
||
Hint: "journalctl -u felis-watchdog -n 50; sudo felis watchdog -dry-run (docs/troubleshooting.md §14)",
|
||
}
|
||
}
|
||
|
||
// StateSetAside is a state file RecoverState moved aside: the alerts it held
|
||
// start over, so a condition still firing is mailed again as new.
|
||
func StateSetAside(aside string) Finding {
|
||
return Finding{
|
||
Key: "watchdog/state", Severity: Warning, Event: true,
|
||
Summary: fmt.Sprintf("平台巡检的状态文件无法读取，已移到 %s 并重新开始：仍未恢复的告警会当作新告警再发一次", aside),
|
||
SummaryEN: fmt.Sprintf("the watchdog's state file was unreadable and was moved to %s; its alerts start over, so one still firing is mailed again as new", aside),
|
||
Hint: "df -h /var/lib/felis (a full disk cuts writes short)",
|
||
}
|
||
}
|
||
|
||
// KubeAPIDown is the finding for an API server that did not answer.
|
||
func KubeAPIDown(err error) Finding {
|
||
return Finding{
|
||
Key: "kube-api", Severity: Critical, For: kubeAPIFor,
|
||
Summary: "Kubernetes API 无法访问：面板、登录和所有服务器的状态都无法确认",
|
||
SummaryEN: "the Kubernetes API is unreachable: the panel, sign-in and every server are in doubt",
|
||
Hint: fmt.Sprintf("systemctl status k3s; journalctl -u k3s -n 200 (%v)", err),
|
||
}
|
||
}
|
||
|
||
// PostgresDown is the finding for a database that did not answer. It runs as
|
||
// the felis-postgres Deployment; the host reaches it on the loopback hostPort.
|
||
func PostgresDown(err error) Finding {
|
||
ns := platform.DefaultControlNamespace
|
||
return Finding{
|
||
Key: "postgres", Severity: Critical, For: postgresFor,
|
||
Summary: "PostgreSQL 无法连接：登录、面板和服务器管理都会失败",
|
||
SummaryEN: "PostgreSQL is unreachable: sign-in, the panel and server management fail",
|
||
Hint: fmt.Sprintf("k3s kubectl -n %s get pods -l app.kubernetes.io/component=%s; k3s kubectl -n %s logs deploy/%s --tail=100 (%v)",
|
||
ns, platform.ComponentPostgres, ns, platform.PostgresName, err),
|
||
}
|
||
}
|
||
|
||
// BackupFinding reports a control-plane database backup older than a day, or
|
||
// none at all, in dir.
|
||
func BackupFinding(dir string, now time.Time) *Finding {
|
||
bundles, err := dbbackup.List(dir)
|
||
if err != nil {
|
||
return &Finding{
|
||
Key: "db-backup", Severity: Critical, For: backupFor,
|
||
Summary: fmt.Sprintf("无法读取数据库备份目录 %s", dir),
|
||
SummaryEN: fmt.Sprintf("cannot read the database backup directory %s: %v", dir, err),
|
||
Hint: "docs/troubleshooting.md §16",
|
||
}
|
||
}
|
||
if len(bundles) > 0 && now.Sub(bundles[0].Created) <= maxBackupAge {
|
||
return nil
|
||
}
|
||
f := &Finding{
|
||
Key: "db-backup", Severity: Critical, For: backupFor,
|
||
Summary: fmt.Sprintf("%s 里没有任何控制面数据库备份", dir),
|
||
SummaryEN: fmt.Sprintf("no control-plane database backup in %s", dir),
|
||
Hint: "journalctl -u felis-db-backup -n 50; take one now with `sudo felis db backup` (docs/troubleshooting.md §16)",
|
||
}
|
||
if len(bundles) > 0 {
|
||
age := roundHours(now.Sub(bundles[0].Created))
|
||
f.Summary = fmt.Sprintf("最新的控制面数据库备份已是 %s 前（%s）", age, bundles[0].Name)
|
||
f.SummaryEN = fmt.Sprintf("the newest control-plane database backup is %s old (%s)", age, bundles[0].Name)
|
||
}
|
||
return f
|
||
}
|
||
|
||
// OffsiteFinding reports an off-site copy that has not completed a clean run
|
||
// within offsite.StaleAfter, going by the record `felis offsite sync` leaves
|
||
// in statusFile. It is a warning: the local copies are intact, but a lost
|
||
// node would now lose what the bucket lacks, and the reaper keeps idle worlds
|
||
// on disk until their archives reach the bucket.
|
||
func OffsiteFinding(statusFile string, now time.Time) *Finding {
|
||
const hint = "journalctl -u felis-offsite -n 50; `sudo felis offsite status` (docs/troubleshooting.md §16)"
|
||
st, err := offsite.ReadStatus(statusFile)
|
||
if err != nil {
|
||
return &Finding{
|
||
Key: "offsite", Severity: Warning, For: backupFor,
|
||
Summary: fmt.Sprintf("无法读取异地备份状态 %s", statusFile),
|
||
SummaryEN: fmt.Sprintf("cannot read the off-site copy status %s: %v", statusFile, err),
|
||
Hint: hint,
|
||
}
|
||
}
|
||
if st != nil && st.KeyMismatch {
|
||
return &Finding{
|
||
Key: "offsite", Severity: Warning, For: backupFor,
|
||
Summary: "异地备份已停止：桶里的对象是用另一把密钥加密的，本机不往桶里写入也不清理任何对象（" + st.LastError + "）",
|
||
SummaryEN: "the off-site copy has stopped: the bucket's objects are sealed with another key, and this host writes and prunes nothing there (" + st.LastError + ")",
|
||
Hint: "`sudo felis offsite check-key`; set FELIS_OFFSITE_KEY in /etc/felis/offsite.env to the key the bucket was written with (docs/troubleshooting.md §16)",
|
||
}
|
||
}
|
||
if st != nil && st.Displaced && st.Writer != nil {
|
||
return &Finding{
|
||
Key: "offsite", Severity: Warning, For: backupFor,
|
||
Summary: fmt.Sprintf("异地备份已停止：主机 %s（id %s）接管了异地备份桶，本机不再往桶里写入", st.Writer.Host, st.Writer.HostID),
|
||
SummaryEN: fmt.Sprintf("the off-site copy has stopped: %s took the bucket over, and this host copies nothing there any more", st.Writer),
|
||
Hint: "if that host is a rehearsal machine, take the bucket back with `sudo felis offsite take-over -yes`; `sudo felis offsite status` (docs/troubleshooting.md §16)",
|
||
}
|
||
}
|
||
if st != nil && st.Standby {
|
||
who, whoEN := "桶里有别的主机写入的副本，但没有记录是哪台主机", "the bucket holds another host's copies and names no host writing it"
|
||
if w := st.Writer; w != nil {
|
||
age := roundHours(max(now.Sub(w.At), 0))
|
||
who = fmt.Sprintf("主机 %s（id %s）在 %s 前写入过这个桶", w.Host, w.HostID, age)
|
||
whoEN = fmt.Sprintf("%s wrote it %s ago", w, age)
|
||
}
|
||
return &Finding{
|
||
Key: "offsite", Severity: Warning, For: backupFor,
|
||
Summary: "本机是从另一台主机的备份建起来的，不往异地备份桶写入：" + who,
|
||
SummaryEN: "this host was built from another host's backup and copies nothing into the off-site bucket: " + whoEN,
|
||
Hint: "once this host replaces that one for good: `sudo felis offsite take-over -yes` (docs/troubleshooting.md §16)",
|
||
}
|
||
}
|
||
if st != nil && !st.LastSuccess.IsZero() && now.Sub(st.LastSuccess) <= offsite.StaleAfter {
|
||
return nil
|
||
}
|
||
f := &Finding{
|
||
Key: "offsite", Severity: Warning, For: backupFor,
|
||
Summary: "异地备份从未成功同步过，世界归档、数据库备份、用户镜像与上传的整合包只在本机",
|
||
SummaryEN: "the off-site copy has never completed; world archives, database bundles, user images and uploaded modpacks exist on this machine only",
|
||
Hint: hint,
|
||
}
|
||
if st != nil && !st.LastSuccess.IsZero() {
|
||
age := roundHours(now.Sub(st.LastSuccess))
|
||
f.Summary = fmt.Sprintf("异地备份已有 %s 没有成功同步", age)
|
||
f.SummaryEN = fmt.Sprintf("the off-site copy last completed %s ago", age)
|
||
}
|
||
if st != nil && st.LastError != "" {
|
||
f.Summary += "（最近一次错误：" + st.LastError + "）"
|
||
f.SummaryEN += " (last error: " + st.LastError + ")"
|
||
}
|
||
return f
|
||
}
|
||
|
||
// ScanDBFinding reports the build lane's tool copies (the vulnerability DBs in
|
||
// particular) not refreshed within maxScanDBAge, going by the record
|
||
// `felis mirror-build-tools` leaves in statusFile. A build still runs and its scan
|
||
// still gates, but against an old DB: a warning.
|
||
func ScanDBFinding(statusFile string, now time.Time) *Finding {
|
||
const hint = "journalctl -u felis-build-tools -n 50; refresh now with `sudo felis mirror-build-tools` (docs/troubleshooting.md §8e)"
|
||
st, err := imagepush.ReadMirrorStatus(statusFile)
|
||
if err != nil {
|
||
return &Finding{
|
||
Key: "scan-db", Severity: Warning, For: backupFor,
|
||
Summary: fmt.Sprintf("无法读取构建工具镜像状态 %s", statusFile),
|
||
SummaryEN: fmt.Sprintf("cannot read the build tools status %s: %v", statusFile, err),
|
||
Hint: hint,
|
||
}
|
||
}
|
||
if st != nil && !st.LastSuccess.IsZero() && now.Sub(st.LastSuccess) <= maxScanDBAge {
|
||
return nil
|
||
}
|
||
f := &Finding{
|
||
Key: "scan-db", Severity: Warning, For: backupFor,
|
||
Summary: "漏洞库从未复制进内置 registry，构建的漏洞扫描无法运行",
|
||
SummaryEN: "the vulnerability DB was never copied into the registry; build scans cannot run",
|
||
Hint: hint,
|
||
}
|
||
if st != nil && !st.LastSuccess.IsZero() {
|
||
age := roundHours(now.Sub(st.LastSuccess))
|
||
f.Summary = fmt.Sprintf("漏洞库已有 %s 没有刷新，构建扫描用的是过期数据", age)
|
||
f.SummaryEN = fmt.Sprintf("the vulnerability DB was last refreshed %s ago; build scans use stale advisories", age)
|
||
}
|
||
if st != nil && st.LastError != "" {
|
||
f.Summary += "（最近一次错误：" + st.LastError + "）"
|
||
f.SummaryEN += " (last error: " + st.LastError + ")"
|
||
}
|
||
return f
|
||
}
|
||
|
||
// DiskFindings reports each filesystem under paths that is running out of
|
||
// space. Paths on one filesystem are reported once, under the first of them; a
|
||
// path that does not exist is skipped (a feature that is not in use).
|
||
func DiskFindings(paths []string) []Finding {
|
||
var out []Finding
|
||
seen := map[uint64]bool{}
|
||
for _, p := range paths {
|
||
var st syscall.Stat_t
|
||
if err := syscall.Stat(p, &st); err != nil {
|
||
continue
|
||
}
|
||
dev := uint64(st.Dev) // int32 on darwin
|
||
if seen[dev] {
|
||
continue
|
||
}
|
||
seen[dev] = true
|
||
var fs syscall.Statfs_t
|
||
if err := syscall.Statfs(p, &fs); err != nil || fs.Blocks == 0 {
|
||
continue
|
||
}
|
||
free := float64(fs.Bavail) / float64(fs.Blocks)
|
||
bsize := uint64(fs.Bsize) // uint32 on darwin
|
||
avail := humanBytes(uint64(fs.Bavail) * bsize)
|
||
switch {
|
||
case free < diskCriticalRatio:
|
||
out = append(out, Finding{
|
||
Key: "disk/" + p, Severity: Critical, For: diskCriticalFor,
|
||
Summary: fmt.Sprintf("%s 所在磁盘只剩 %.1f%%（%s）：kubelet 即将驱逐游戏服务器", p, free*100, avail),
|
||
SummaryEN: fmt.Sprintf("the filesystem holding %s is %.1f%% free (%s): the kubelet is about to evict game servers", p, free*100, avail),
|
||
Hint: "docs/troubleshooting.md §13b",
|
||
})
|
||
case free < diskLowRatio:
|
||
out = append(out, Finding{
|
||
Key: "disk/" + p, Severity: Warning, For: diskLowFor,
|
||
Summary: fmt.Sprintf("%s 所在磁盘只剩 %.1f%%（%s）", p, free*100, avail),
|
||
SummaryEN: fmt.Sprintf("the filesystem holding %s is %.1f%% free (%s)", p, free*100, avail),
|
||
Hint: "docs/troubleshooting.md §13b",
|
||
})
|
||
}
|
||
}
|
||
return out
|
||
}
|
||
|
||
// MemoryFinding reports sustained low available memory from a /proc/meminfo
|
||
// style file. A file that cannot be read (not Linux) reports nothing.
|
||
func MemoryFinding(meminfo string) *Finding {
|
||
f, err := os.Open(meminfo)
|
||
if err != nil {
|
||
return nil
|
||
}
|
||
defer f.Close()
|
||
vals := map[string]uint64{}
|
||
sc := bufio.NewScanner(f)
|
||
for sc.Scan() {
|
||
fields := strings.Fields(sc.Text())
|
||
if len(fields) < 2 {
|
||
continue
|
||
}
|
||
if v, err := strconv.ParseUint(fields[1], 10, 64); err == nil {
|
||
vals[strings.TrimSuffix(fields[0], ":")] = v * 1024
|
||
}
|
||
}
|
||
total, avail := vals["MemTotal"], vals["MemAvailable"]
|
||
if total == 0 || float64(avail)/float64(total) >= memoryLowRatio {
|
||
return nil
|
||
}
|
||
return &Finding{
|
||
Key: "memory", Severity: Warning, For: memoryLowFor,
|
||
Summary: fmt.Sprintf("主机可用内存只剩 %s / %s：有 OOM 风险", humanBytes(avail), humanBytes(total)),
|
||
SummaryEN: fmt.Sprintf("host memory available is %s of %s: processes risk being OOM-killed", humanBytes(avail), humanBytes(total)),
|
||
Hint: "PostgreSQL, the control plane, the registry and game servers share this node; stop idle servers or lower their memory",
|
||
}
|
||
}
|
||
|
||
// roundHours prints a duration to the hour, "35h" rather than "35h0m0s".
|
||
func roundHours(d time.Duration) string {
|
||
return strings.TrimSuffix(d.Round(time.Hour).String(), "0m0s")
|
||
}
|
||
|
||
func humanBytes(b uint64) string {
|
||
const unit = 1024
|
||
if b < unit {
|
||
return fmt.Sprintf("%d B", b)
|
||
}
|
||
div, exp := uint64(unit), 0
|
||
for n := b / unit; n >= unit; n /= unit {
|
||
div *= unit
|
||
exp++
|
||
}
|
||
return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
|
||
}
|