PCDOE Optimizing service performance — All Questions With Answers

Refer to the exhibit.

```
$ gcloud compute instances describe instance-1 --zone=us-central1-a
...
networkInterfaces:
- accessConfigs:
  - name: external-nat
    natIP: 34.123.45.67
    type: ONE_TO_ONE_NAT
  name: nic0
  network: https://www.googleapis.com/compute/v1/projects/my-project/global/networks/default
  subnetwork: https://www.googleapis.com/compute/v1/projects/my-project/regions/us-central1/subnetworks/default
...
disks:
- autoDelete: true
  boot: true
  deviceName: instance-1
  diskSizeGb: '100'
  interface: SCSI
  source: https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-a/disks/instance-1
  type: PERSISTENT
...
serviceAccounts:
- email: 123456789-compute@developer.gserviceaccount.com
  scopes:
  - https://www.googleapis.com/auth/devstorage.read_only
  - https://www.googleapis.com/auth/logging.write
  - https://www.googleapis.com/auth/monitoring.write
  - https://www.googleapis.com/auth/servicecontrol
  - https://www.googleapis.com/auth/service.management.readonly
  - https://www.googleapis.com/auth/trace.append
```

Refer to the exhibit.

---
# Sample error from Cloud Logging
{
  "httpRequest": {
    "requestUrl": "https://example.com/data",
    "status": 504
  },
  "resource": {
    "type": "gae_app",
    "labels": {
      "module_id": "default",
      "version_id": "v2"
    }
  },
  "textPayload": "The request was terminated because it took longer than 60 seconds."
}
---

Refer to the exhibit.

---
# gcloud logging read output (partial)
insertId: abc123
resource: {
  type: "k8s_container"
  labels: {
    cluster_name: "prod-cluster"
    namespace_name: "payment"
    pod_name: "payment-svc-7df4b9c6f8-5k9j2"
    container_name: "payment"
  }
}
textPayload: "E0111 12:34:56.789012     123 main.go:45] rpc error: code = Unavailable desc = connection closed"
severity: ERROR
---

Refer to the exhibit.

Cloud Monitoring alert policy (YAML):
```yaml
alertPolicy:
  displayName: 'High CPU Utilization'
  combiner: OR
  conditions:
  - displayName: 'CPU utilization > 80% for 5 min'
    conditionThreshold:
      filter: 'metric.type="kubernetes.io/container/cpu/usage_time" AND resource.type="k8s_container" AND resource.labels.cluster_name="prod-cluster"'
      aggregations:
      - alignmentPeriod: 60s
        perSeriesAligner: ALIGN_RATE
      - crossSeriesReducer: REDUCE_SUM
        groupByFields:
        - resource.label.namespace_name
        - resource.label.container_name
      - conditionThreshold:
        thresholdValue: 0.8
        duration: 300s
        comparison: COMPARISON_GT
  notificationChannels:
  - 'projects/my-project/notificationChannels/12345'
```

Command: gcloud compute instances list --format="value(name,zone,cpuPlatform,status)" Output: instance-1 us-central1-a Intel Haswell RUNNING instance-2 us-central1-a Intel Skylake RUNNING instance-3 us-central1-b Intel Broadwell RUNNING

Firewall rule JSON:
{
  "name": "deny-high-latency",
  "network": "default",
  "priority": 1000,
  "direction": "INGRESS",
  "sourceRanges": ["0.0.0.0/0"],
  "allow": [{"protocol": "tcp", "ports": ["80","443"]}],
  "deny": [{"protocol": "tcp", "ports": ["80","443"]}],
  "logConfig": {"metadata": "INCLUDE_ALL_METADATA"}
}

Cloud Monitoring alert policy configuration:
Condition type: Metric threshold
Resource type: Cloud Run Revision
Metric: request_count
Condition: Any time series violates
Threshold: > 1000
Duration: 1m

{
  "textPayload": "ERROR: ENOENT: no such file or directory, open '/app/data/config.txt'",
  "resource": {
    "type": "k8s_container",
    "labels": {
      "cluster_name": "prod-cluster",
      "namespace_name": "default",
      "pod_name": "api-pod-xyz"
    }
  },
  "severity": "ERROR",
  "timestamp": "2023-10-01T12:00:00Z"
}

NAME        ZONE           MACHINE_TYPE   PREEMPTIBLE
instance-1  us-central1-a  n1-standard-2  yes
instance-2  us-central1-a  n1-highcpu-16  no
instance-3  us-central1-b  n1-highmem-8   no

httpRequest: {
  requestMethod: "POST"
  requestUrl: "https://example.com/api/orders"
  status: 200
  responseSize: "4521"
  latency: "2.345s"
  remoteIp: "203.0.113.100"
  cacheHit: false
}
httpRequest: {
  requestMethod: "POST"
  requestUrl: "https://example.com/api/orders"
  status: 200
  responseSize: "4521"
  latency: "0.012s"
  remoteIp: "203.0.113.101"
  cacheHit: true
}

kubectl describe node gke-cluster-default-pool-12345678-ab
...
Capacity:
  cpu: 8
  memory: 32768Mi
  ephemeral-storage: 100Gi
Allocatable:
  cpu: 7
  memory: 30720Mi
  ephemeral-storage: 90Gi
...
Conditions:
  Type                 Status  Message
  ----                 ------  -------
  MemoryPressure       True    Node is experiencing memory pressure
  DiskPressure         False
  PIDPressure          False
  Ready                True
...

Function                          CPU Time (ms)   %
getCustomerData()                  1200           60%
processOrder()                     400            20%
saveToDatabase()                   300            15%
other                              100            5%
Total                              2000

NAME        ZONE          MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP   EXTERNAL_IP    STATUS
instance-1  us-central1-c  n1-standard-2  false        10.128.0.2    34.67.89.100   RUNNING
instance-2  us-central1-c  n1-highmem-4   false        10.128.0.3    34.67.89.101   RUNNING
instance-3  us-central1-c  n1-standard-2  true         10.128.0.4    34.67.89.102   RUNNING