Datadog container unable to connect to redis server - docker

Question

I am running the datadog container as one of the services in docker compose. I am running Agent: 7 for my purposes.
version: "3.9"
services:
app:
image: app
container_name: app
hostname: app
build:
context: .
dockerfile: Dockerfile
restart: unless-stopped
ports:
- 8080:80
volumes:
- shared_volume:/tmp/logs
datadog:
container_name: dd-agent
image: gcr.io/datadoghq/agent:7
restart: always
ports:
- 8125:8125/udp
- 8126:8126
environment:
- DD_API_KEY=${DATADOG_API_KEY}
- DD_SITE=${DD_SITE}
- DD_DOGSTATSD_NON_LOCAL_TRAFFIC=${DD_DOGSTATSD_NON_LOCAL_TRAFFIC}
- DD_LOGS_ENABLED="true"
- DD_APM_ENABLED="true"
- DD_LOGS_CONFIG_CONTAINER_COLLECT_ALL="true"
- DD_CONTAINER_EXCLUDE_LOGS="name:dd-agent"
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
- /proc/:/host/proc/:ro
# - /opt/dd-agent/run:/opt/dd-agent/run:rw
- /sys/fs/cgroup/:/host/sys/fs/cgroup:ro
volumes:
shared_volume:
However running the datadog container runs into an error. The error log says that it's trying to connect to a redis server. I am not sure where is this coming from, as I don't recollect redis being one of the dependencies for datadog.
Pasted same log below for convenience -
dd-agent | 2022-10-11 10:13:53 UTC | CORE | ERROR | (pkg/collector/worker/check_logger.go:69 in Error) | check:php_fpm | Error running check: [{"message": "Detected 1 error while loading configuration model `InstanceConfig`:\n__root__\n Field `status_url` or `ping_url` must be set", "traceback": "Traceback (most recent call last):\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/base/checks/base.py\", line 1091, in run\n initialization()\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/base/checks/base.py\", line 492, in load_configuration_models\n instance_config = self.load_configuration_model(package_path, 'InstanceConfig', raw_instance_config)\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/base/checks/base.py\", line 536, in load_configuration_model\n raise_from(ConfigurationError('\\n'.join(message_lines)), None)\n File \"<string>\", line 3, in raise_from\ndatadog_checks.base.errors.ConfigurationError: Detected 1 error while loading configuration model `InstanceConfig`:\n__root__\n Field `status_url` or `ping_url` must be set\n"}]
dd-agent | 2022-10-11 10:13:57 UTC | CORE | ERROR | (pkg/collector/worker/check_logger.go:69 in Error) | check:redisdb | Error running check: [{"message": "Timeout connecting to server", "traceback": "Traceback (most recent call last):\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/connection.py\", line 611, in connect\n sock = self.retry.call_with_retry(\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/retry.py\", line 51, in call_with_retry\n raise error\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/retry.py\", line 46, in call_with_retry\n return do()\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/connection.py\", line 612, in <lambda>\n lambda: self._connect(), lambda error: self.disconnect(error)\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/connection.py\", line 677, in _connect\n raise err\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/connection.py\", line 665, in _connect\n sock.connect(socket_address)\nsocket.timeout: timed out\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/base/checks/base.py\", line 1116, in run\n self.check(instance)\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/redisdb/redisdb.py\", line 556, in check\n self._check_db()\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/datadog_checks/redisdb/redisdb.py\", line 205, in _check_db\n info = conn.info()\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/commands/core.py\", line 970, in info\n return self.execute_command(\"INFO\", **kwargs)\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/client.py\", line 1235, in execute_command\n conn = self.connection or pool.get_connection(command_name, **options)\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/connection.py\", line 1387, in get_connection\n connection.connect()\n File \"/opt/datadog-agent/embedded/lib/python3.8/site-packages/redis/connection.py\", line 615, in connect\n raise TimeoutError(\"Timeout connecting to server\")\nredis.exceptions.TimeoutError: Timeout connecting to server\n"}]

Answer 1

This is a known issue, however it does not interfere with the agent collection and sending logs and traces to Datadog.
Here is a comment on that same issue
do not pay attention on this . its do not have any impact on collection and sending data
I ran into the same issue and can confirm that the agent still works. I wish they would fix this or change the error message to a warning with a message "You may disregard this warning".