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Add health check and self reporting of health

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This avoids panicing and instead provides an HTTP endpoint to report health
This commit is contained in:
Ian Fijolek
2024-04-03 11:23:26 -07:00
parent 01cca50532
commit 0a36da79d6
5 changed files with 261 additions and 28 deletions
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main_test.go
+63 -17
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@@ -4,9 +4,10 @@ import "testing"
func TestCheckMonitors(t *testing.T) {
cases := []struct {
config Config
expectErr bool
name string
config Config
expectErr bool
name string
selfMonitor bool
}{
{
config: Config{},
@@ -22,8 +23,9 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: false,
name: "Monitor success, no alerts",
expectErr: false,
name: "Monitor success, no alerts",
selfMonitor: false,
},
{
config: Config{
@@ -35,8 +37,9 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: false,
name: "Monitor failure, no alerts",
expectErr: false,
name: "Monitor failure, no alerts",
selfMonitor: false,
},
{
config: Config{
@@ -48,8 +51,9 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: false,
name: "Monitor recovery, no alerts",
expectErr: false,
name: "Monitor recovery, no alerts",
selfMonitor: false,
},
{
config: Config{
@@ -62,8 +66,9 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: true,
name: "Monitor failure, unknown alerts",
expectErr: true,
name: "Monitor failure, unknown alerts",
selfMonitor: false,
},
{
config: Config{
@@ -76,8 +81,24 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: true,
name: "Monitor recovery, unknown alerts",
expectErr: true,
name: "Monitor recovery, unknown alerts",
selfMonitor: false,
},
{
config: Config{
Monitors: []*Monitor{
{
Name: "Success",
Command: CommandOrShell{Command: []string{"true"}},
AlertUp: []string{"unknown"},
alertCount: 1,
},
},
},
expectErr: false,
name: "Monitor recovery, unknown alerts, with Health Check",
selfMonitor: true,
},
{
config: Config{
@@ -95,8 +116,9 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: false,
name: "Monitor failure, successful alert",
expectErr: false,
name: "Monitor failure, successful alert",
selfMonitor: false,
},
{
config: Config{
@@ -115,12 +137,36 @@ func TestCheckMonitors(t *testing.T) {
},
},
},
expectErr: true,
name: "Monitor failure, bad alert",
expectErr: true,
name: "Monitor failure, bad alert",
selfMonitor: false,
},
{
config: Config{
Monitors: []*Monitor{
{
Name: "Failure",
Command: CommandOrShell{Command: []string{"false"}},
AlertDown: []string{"bad"},
AlertAfter: 1,
},
},
Alerts: map[string]*Alert{
"bad": {
Name: "bad",
Command: CommandOrShell{Command: []string{"false"}},
},
},
},
expectErr: false,
name: "Monitor failure, bad alert, with Health Check",
selfMonitor: true,
},
}
for _, c := range cases {
SelfMonitor = c.selfMonitor
err := c.config.Init()
if err != nil {
t.Errorf("checkMonitors(%s): unexpected error reading config: %v", c.name, err)