GCP Google Cloud Platform - Build Cloud Logging Queries

Step-01: Introduction¶

Create VM Instance with webserver installed
Instal Ops Agent
How to build Cloud Logging Queries ?
How to view logs Historgram view ?

Step-02: Create VM Instance with sample webserver installed¶

# Set Project
gcloud config set project PROJECT_ID
gcloud config set project gcplearn9

# Create VM Instance
gcloud compute instances create myvm1 \
  --zone=us-central1-a \
  --machine-type=e2-micro \
  --network-interface=subnet=default \
  --tags=http-server \
  --metadata-from-file=startup-script=webserver-install.sh 

# List Compute Instances
gcloud compute instances list

Step-03: Install OpsAgent in the VM Instance¶

# Verify VM Metrics
1. Go to Compute Engine -> VM Instances -> myvm1 -> OBSERVABILITY Tab
2. Click on CPU, PROCESS, MEMORY
3. It shows the message "Requires Ops Agent"

# Connect SSH to VM
gcloud compute ssh --zone "us-central1-a" "myvm1" --project "gcplearn9"

# Download Ops Agent
curl -sSO https://dl.google.com/cloudagents/add-google-cloud-ops-agent-repo.sh

# Install Ops Agent
sudo bash add-google-cloud-ops-agent-repo.sh --also-install
sudo apt list --installed | grep google-cloud-ops-agent

# Verify Ops Agent Status
sudo systemctl status google-cloud-ops-agent"*"

# Restarting Agent (Optional)
sudo service google-cloud-ops-agent restart

# Verify if OPS Agent installed successfully
Go to Cloud Monitoring -> Dashboards -> VM Instances (Predefined)
Verify if OpsAgent status

Step-04: Logging Queries - How to build using Log Fields¶

# Review All log entries of a specific VM Instance
resource.type="gce_instance"
resource.labels.instance_id="1007443947412164107"

# Review syslog
resource.type="gce_instance"
resource.labels.instance_id="1007443947412164107"
log_name="projects/gcplearn9/logs/syslog"

# Review Warning Logs
resource.type="gce_instance"
resource.labels.instance_id="1007443947412164107"
severity=WARNING

Step-05: Histogram View¶

Enable Histogram view