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Logs command invocation output when ssm command fails in wait
1 parent a05f602 commit 50963db

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2 files changed

+140
-63
lines changed

2 files changed

+140
-63
lines changed

‎updater/aws.go‎

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -371,6 +371,7 @@ func (u *updater) sendCommand(instanceIDs []string, ssmDocument string) (string,
371371
if err != nil {
372372
errCount++
373373
log.Printf("Error encountered while awaiting document %q execution for instance: %q: %s", ssmDocument, v, err)
374+
u.logCommmandOutput(commandID, v)
374375
}
375376
}
376377
// TODO return a list of instanceIDs which ecnountered no waiter errors.
@@ -392,6 +393,18 @@ func (u *updater) getCommandResult(commandID string, instanceID string) ([]byte,
392393
return commandResults, nil
393394
}
394395

396+
// logCommmandOutput logs the ssm command invocation response
397+
func (u *updater) logCommmandOutput(commandID string, instanceID string) {
398+
resp, err := u.ssm.GetCommandInvocation(&ssm.GetCommandInvocationInput{
399+
CommandId: aws.String(commandID),
400+
InstanceId: aws.String(instanceID),
401+
})
402+
if err != nil {
403+
log.Printf("Failed to get invocation output for instance %q: %v", instanceID, err)
404+
}
405+
log.Printf("Invocation output for instance %q: %#q", instanceID, resp)
406+
}
407+
395408
// waitUntilOk takes an EC2 ID as a parameter and waits until the specified EC2 instance is in an Ok status.
396409
func (u *updater) waitUntilOk(ec2ID string) error {
397410
log.Printf("Waiting for instance %q to reach Ok status", ec2ID)

‎updater/aws_test.go‎

Lines changed: 127 additions & 63 deletions
Original file line numberDiff line numberDiff line change
@@ -14,93 +14,147 @@ import (
1414
"github.com/stretchr/testify/require"
1515
)
1616

17-
func TestSendCommand(t *testing.T) {
18-
// commandSuccessInstance indicates an instance for which the command should succeed
19-
// regardless of whether `waitError` is set.
20-
const commandSuccessInstance = "inst-success"
21-
cases := []struct {
22-
name string
23-
sendOutput *ssm.SendCommandOutput
24-
sendError error
25-
expectedError string
26-
expectedOut string
27-
waitError error
28-
instances []string
29-
}{
30-
{
31-
name: "send success",
32-
sendOutput: &ssm.SendCommandOutput{
33-
Command: &ssm.Command{CommandId: aws.String("id1")},
34-
},
35-
instances: []string{"inst-id-1"},
36-
expectedOut: "id1",
17+
func TestSendCommandSuccess(t *testing.T) {
18+
instances := []string{"inst-id-1", "inst-id-2"}
19+
waitInstanceIDs := []string{}
20+
mockSSM := MockSSM{
21+
SendCommandFn: func(input *ssm.SendCommandInput) (*ssm.SendCommandOutput, error) {
22+
assert.Equal(t, "test-doc", aws.StringValue(input.DocumentName))
23+
assert.Equal(t, "$DEFAULT", aws.StringValue(input.DocumentVersion))
24+
assert.Equal(t, aws.StringSlice(instances), input.InstanceIds)
25+
return &ssm.SendCommandOutput{Command: &ssm.Command{CommandId: aws.String("command-id")}}, nil
3726
},
38-
{
39-
name: "send fail",
40-
sendError: errors.New("failed to send command"),
41-
expectedError: "send command failed",
42-
instances: []string{"inst-id-1"},
27+
WaitUntilCommandExecutedWithContextFn: func(ctx aws.Context, input *ssm.GetCommandInvocationInput, opts ...request.WaiterOption) error {
28+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
29+
waitInstanceIDs = append(waitInstanceIDs, aws.StringValue(input.InstanceId))
30+
return nil
4331
},
44-
{
45-
name: "wait single failure",
46-
waitError: errors.New("exceeded max attempts"),
47-
sendOutput: &ssm.SendCommandOutput{
48-
Command: &ssm.Command{CommandId: aws.String("")},
49-
},
50-
expectedError: "too many failures while awaiting document execution",
51-
instances: []string{"inst-id-1"},
32+
}
33+
u := updater{ssm: mockSSM}
34+
commandID, err := u.sendCommand(instances, "test-doc")
35+
require.NoError(t, err)
36+
assert.EqualValues(t, "command-id", commandID)
37+
assert.Equal(t, instances, waitInstanceIDs)
38+
}
39+
40+
func TestSendCommandErr(t *testing.T) {
41+
instances := []string{"inst-id-1", "inst-id-2"}
42+
sendError := errors.New("failed to send command")
43+
mockSSM := MockSSM{
44+
SendCommandFn: func(input *ssm.SendCommandInput) (*ssm.SendCommandOutput, error) {
45+
assert.Equal(t, "test-doc", aws.StringValue(input.DocumentName))
46+
assert.Equal(t, "$DEFAULT", aws.StringValue(input.DocumentVersion))
47+
assert.Equal(t, aws.StringSlice(instances), input.InstanceIds)
48+
return nil, sendError
5249
},
50+
}
51+
u := updater{ssm: mockSSM}
52+
commandID, err := u.sendCommand(instances, "test-doc")
53+
require.Error(t, err)
54+
assert.Equal(t, "", commandID)
55+
assert.ErrorIs(t, err, sendError)
56+
57+
}
58+
59+
func TestSendCommandWaitErr(t *testing.T) {
60+
cases := []struct {
61+
name string
62+
instances []string
63+
}{
5364
{
54-
name: "wait one succcess",
55-
waitError: errors.New("exceeded max attempts"),
56-
sendOutput: &ssm.SendCommandOutput{
57-
Command: &ssm.Command{CommandId: aws.String("id1")},
58-
},
59-
instances: []string{"inst-id-1", "inst-id-2", commandSuccessInstance},
60-
expectedOut: "id1",
65+
name: "wait single failure",
66+
instances: []string{"inst-id-1"},
6167
},
6268
{
6369
name: "wait fail all",
64-
waitError: errors.New("exceeded max attempts"),
65-
sendOutput: &ssm.SendCommandOutput{
66-
Command: &ssm.Command{CommandId: aws.String("id1")},
67-
},
68-
expectedError: "too many failures while awaiting document execution",
69-
instances: []string{"inst-id-1", "inst-id-2", "inst-id-3"},
70+
instances: []string{"inst-id-1", "inst-id-2", "inst-id-3"},
7071
},
7172
}
7273
for _, tc := range cases {
7374
t.Run(tc.name, func(t *testing.T) {
75+
waitError := errors.New("exceeded max attempts")
76+
failedInstanceIDs := []string{}
7477
mockSSM := MockSSM{
7578
SendCommandFn: func(input *ssm.SendCommandInput) (*ssm.SendCommandOutput, error) {
7679
assert.Equal(t, "test-doc", aws.StringValue(input.DocumentName))
77-
assert.Equal(t, "$DEFAULT", aws.StringValue(input.DocumentVersion))
7880
assert.Equal(t, aws.StringSlice(tc.instances), input.InstanceIds)
79-
return tc.sendOutput, tc.sendError
81+
return &ssm.SendCommandOutput{
82+
Command: &ssm.Command{CommandId: aws.String("command-id")},
83+
}, nil
8084
},
8185
WaitUntilCommandExecutedWithContextFn: func(ctx aws.Context, input *ssm.GetCommandInvocationInput, opts ...request.WaiterOption) error {
82-
if aws.StringValue(input.InstanceId) == commandSuccessInstance {
83-
return nil
84-
}
85-
return tc.waitError
86+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
87+
return waitError
88+
},
89+
GetCommandInvocationFn: func(input *ssm.GetCommandInvocationInput) (*ssm.GetCommandInvocationOutput, error) {
90+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
91+
failedInstanceIDs = append(failedInstanceIDs, aws.StringValue(input.InstanceId))
92+
return &ssm.GetCommandInvocationOutput{}, nil
8693
},
8794
}
8895
u := updater{ssm: mockSSM}
89-
actual, err := u.sendCommand(tc.instances, "test-doc")
90-
if tc.expectedOut != "" {
91-
require.NoError(t, err)
92-
assert.EqualValues(t, tc.expectedOut, actual)
93-
} else if tc.sendError != nil {
94-
assert.ErrorIs(t, err, tc.sendError)
95-
assert.Contains(t, err.Error(), tc.expectedError)
96-
} else {
97-
assert.ErrorIs(t, err, tc.waitError)
98-
assert.Contains(t, err.Error(), tc.expectedError)
99-
}
96+
commandID, err := u.sendCommand(tc.instances, "test-doc")
97+
require.Error(t, err)
98+
assert.ErrorIs(t, err, waitError)
99+
assert.Equal(t, "", commandID)
100+
assert.Equal(t, tc.instances, failedInstanceIDs, "should match instances for which wait fail")
100101
})
101102
}
102103
}
103104

105+
func TestSendCommandWaitSuccess(t *testing.T) {
106+
mockSendCommand := func(input *ssm.SendCommandInput) (*ssm.SendCommandOutput, error) {
107+
assert.Equal(t, "test-doc", aws.StringValue(input.DocumentName))
108+
return &ssm.SendCommandOutput{
109+
Command: &ssm.Command{CommandId: aws.String("command-id")},
110+
}, nil
111+
}
112+
t.Run("wait one success", func(t *testing.T) {
113+
// commandSuccessInstance indicates an instance for which the command should succeed
114+
const commandSuccessInstance = "inst-success"
115+
instances := []string{"inst-id-1", "inst-id-1", commandSuccessInstance}
116+
expectedFailInstances := []string{"inst-id-1", "inst-id-1"}
117+
failedInstanceIDs := []string{}
118+
mockSSM := MockSSM{
119+
SendCommandFn: mockSendCommand,
120+
WaitUntilCommandExecutedWithContextFn: func(ctx aws.Context, input *ssm.GetCommandInvocationInput, opts ...request.WaiterOption) error {
121+
if aws.StringValue(input.InstanceId) == commandSuccessInstance {
122+
return nil
123+
}
124+
return errors.New("exceeded max attempts")
125+
},
126+
GetCommandInvocationFn: func(input *ssm.GetCommandInvocationInput) (*ssm.GetCommandInvocationOutput, error) {
127+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
128+
failedInstanceIDs = append(failedInstanceIDs, aws.StringValue(input.InstanceId))
129+
return &ssm.GetCommandInvocationOutput{}, nil
130+
},
131+
}
132+
u := updater{ssm: mockSSM}
133+
commandID, err := u.sendCommand(instances, "test-doc")
134+
require.NoError(t, err)
135+
assert.Equal(t, "command-id", commandID)
136+
assert.Equal(t, expectedFailInstances, failedInstanceIDs, "should match instances for which wait fail")
137+
})
138+
t.Run("wait all success", func(t *testing.T) {
139+
instances := []string{"inst-id-1", "inst-id-1"}
140+
waitInstanceIDs := []string{}
141+
mockSSM := MockSSM{
142+
SendCommandFn: mockSendCommand,
143+
WaitUntilCommandExecutedWithContextFn: func(ctx aws.Context, input *ssm.GetCommandInvocationInput, opts ...request.WaiterOption) error {
144+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
145+
waitInstanceIDs = append(waitInstanceIDs, aws.StringValue(input.InstanceId))
146+
return nil
147+
},
148+
}
149+
u := updater{ssm: mockSSM}
150+
commandID, err := u.sendCommand(instances, "test-doc")
151+
require.NoError(t, err)
152+
assert.Equal(t, "command-id", commandID)
153+
assert.Equal(t, instances, waitInstanceIDs)
154+
})
155+
156+
}
157+
104158
func TestListContainerInstances(t *testing.T) {
105159
cases := []struct {
106160
name string
@@ -695,6 +749,11 @@ func TestUpdateInstanceErr(t *testing.T) {
695749
assert.Equal(t, "instance-id", aws.StringValue(input.InstanceId))
696750
return waitExecErr
697751
},
752+
GetCommandInvocationFn: func(input *ssm.GetCommandInvocationInput) (*ssm.GetCommandInvocationOutput, error) {
753+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
754+
assert.Equal(t, "instance-id", aws.StringValue(input.InstanceId))
755+
return &ssm.GetCommandInvocationOutput{}, nil
756+
},
698757
}
699758
u := updater{ssm: mockSSM, checkDocument: "check-document"}
700759
err := u.updateInstance(instance{
@@ -842,6 +901,11 @@ func TestVerifyUpdateErr(t *testing.T) {
842901
assert.Equal(t, "instance-id", aws.StringValue(input.InstanceId))
843902
return waitExecErr
844903
},
904+
GetCommandInvocationFn: func(input *ssm.GetCommandInvocationInput) (*ssm.GetCommandInvocationOutput, error) {
905+
assert.Equal(t, "command-id", aws.StringValue(input.CommandId))
906+
assert.Equal(t, "instance-id", aws.StringValue(input.InstanceId))
907+
return &ssm.GetCommandInvocationOutput{}, nil
908+
},
845909
}
846910
u := updater{ssm: mockSSM, checkDocument: "check-document"}
847911
ok, err := u.verifyUpdate(instance{

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