How to setup Astra Traffic Collector in VM

Here's how to configure Astra Traffic Collector for traffic monitoring inside a linux based VM (AWS/GCP/Azure/DO). It also covers troubleshooting common issues encountered during configuration.

Traffic Collector integration

Quick Installation

SSH into the VM.

Pre-requisite
Install Docker Compose in your VM by following the official doc.

Create a directory for the Astra Traffic Collector

mkdir -p /opt/astra-traffic-collector && cd /opt/astra-traffic-collector

Create docker-compose.yaml file

version: '3.3' 
services:
  my-service-init:
    image: busybox:1.35.0-uclibc
    user: root
    volumes:
      - collector-message:/tmp/message_data
    command: chown -R 10001:10001 /tmp/message_data
  otel-sensor:
    image: docker.io/getastra/traffic-collector
    container_name: astra-traffic-collector
    volumes:
      - collector-message:/var/lib/otelcol/file_storage:z
      - /opt/astra-traffic-collector/config_custom.yaml:/etc/otelcol-contrib/config_custom.yaml:ro
    network_mode: host
    env_file:
      - .env
    restart: always
    depends_on:
      - my-service-init
volumes:
  collector-message:

Create .env file
Replace <collectorId> with the COLLECTOR_ID displayed during the creation of astra traffic collector integration.
Replace <clientId> with the CLIENT_ID displayed during the creation of astra traffic collector integration.
Replace <clientSecret> with the CLIENT_SECRET displayed during the creation of astra traffic collector integration.

COLLECTOR_ID=<collectorId>
CLIENT_ID=<clientId>
CLIENT_SECRET=<clientSecret>
TOKEN_URL=https://auth.getastra.com/realms/astra_api_scanner/protocol/openid-connect/token

Create config_custom.yaml file

processors:
  
  # https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/filterprocessor
  filter/custom:
    error_mode: ignore
    traces:
      span:
        ## allowing traces based on hostname regex pattern. Following will drop all traces originated from host other than: localhost*
        # - IsMatch(attributes["url.host"], "localhost*") == false
        ## excluding traces based on hostname regex pattern. Following will drop all traces originated from host: localhost*
        # - IsMatch(attributes["url.host"], "localhost*")
        ## exclude traces with method set to OPTIONS. Comment below line to allow the traces with http method OPTIONS
        - ConvertCase(attributes["http.method"], "upper") == "OPTIONS"
  
  # https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/transformprocessor
  transform/custom:
    error_mode: ignore
    trace_statements:
      - context: span
        statements:
          ## Templatize url path regex pattern by keyword: "slug". Following will templatize the url Path: /api/v1/chinchikrqwertyuiop/ -> /api/v1/{{slug}}/
          - replace_pattern(attributes["url.template"], "chinchikrqwertyuiop", "{{slug}}")
          ## Redact MasterCard credit card number 
          #- replace_all_patterns(attributes, "value", "^5[1-5][0-9]{14}$", "{{card}}")

Create linux service file under /etc/systemd/system/astra-traffic-collector.service
The service file allows the Astra Traffic Collector to be managed as a systemd service, enabling easy start, stop, restart, and automatic start on boot.

[Unit]
Description=Start Astra's traffic collectors
After=docker.service
Requires=docker.service

[Service]
Type=simple
ExecStart=/bin/bash -c "docker compose -f /opt/astra-traffic-collector/docker-compose.yaml up"
ExecStop=/bin/bash -c "docker compose -f /opt/astra-traffic-collector/docker-compose.yaml down"
Restart=always

[Install]
WantedBy=multi-user.target

Manage the service by using systemctl

# Enable the service to start on boot
sudo systemctl enable astra-traffic-collector

# Manage the service
sudo systemctl start | stop | restart | status astra-traffic-collector

# Disable the service
sudo systemctl disable astra-traffic-collector

Customizing the behavior of astra-traffic-collector

Stop the astra-traffic-collector by running

sudo systemctl stop astra-traffic-collector

To customize the traffic collector edit the /opt/astra-traffic-collector/config_custom.yaml. Refer here

Start the traffic collector by running

sudo systemctl start astra-traffic-collector

Upgrade

Docker container upgrade

This process updates the running container to a new version of the collector while retaining any customization you've made via configuration files, such as custom config.yaml_.

Change directory where docker-compose.yaml is present: cd /opt/astra-traffic-collector/

Run docker-compose down on the docker-compose.yaml to stop the container

Edit the image version field in services.otel-sensor.image of docker-compose.yaml to the latest image version and run the docker-compose up command to spin up the new container.

Troubleshooting

Unable to send traces from traffic collector to ga collector

Symptoms

No entries in inventory/ inventory not getting updated

Following or similar error seen in traffic-collector container log

error	exporterhelper/queue_sender.go:92	Exporting failed. Dropping data.	{"kind": "exporter", "data_type": "traces", "name": "otlp", "error": "not retryable error: Permanent error: rpc error: code = Unauthenticated desc = transport: per-RPC creds failed due to error: failed to get security token from token endpoint (endpoint \"https://kc-admin.getastra.dev/realms/astra_api_scanner/protocol/openid-connect/token\"); oauth2: \"unauthorized_client\" \"Invalid client or Invalid client credentials\"", "dropped_items": 1}

Cause

Authenication fails with IAM server

Solution

Edit /opt/astra-traffic-collector/.env and update it with right credentials.

Restart astra-traffic-collector

sudo systemctl stop astra-traffic-collector
sudo systemctl start astra-traffic-collector

Unable to see entries in inventory

Symptoms

No entries in inventory/ inventory not getting updated

No error in nginx/traffic-collector log

Cause

Unregistered hostname

Solution

Double check if the hostname is registered under Scope URI for Report in Target setup page

FAQ (Frequently Asked Questions)

Can I see what trace are sent from my environment?

Yes, one can see the traces sent by traffic-collector by inspecting docker logs. Run docker logs <traffic-collector-container name>

Updated on: 21/11/2024