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📝 WalkthroughWalkthroughThe MongoDB service healthcheck in docker-compose.yaml was simplified by removing authentication parameters (--username, --password, --authenticationDatabase) from the mongosh ping command. The healthcheck now executes a basic database ping without explicit credentials. Changes
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Pull request overview
This PR simplifies the MongoDB healthcheck in docker-compose.yaml by removing the authentication flags (--username, --password, --authenticationDatabase) from the mongosh command used in the healthcheck.test field. Since db.adminCommand("ping") in MongoDB does not require authentication, the simplified command is functionally equivalent for health-checking purposes.
Changes:
- Removed authentication credentials from the MongoDB
healthcheckcommand indocker-compose.yaml, relying on the fact thatdb.adminCommand("ping")works without authentication in MongoDB.
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@docker-compose.yaml`:
- Line 63: The healthcheck command (the test line invoking mongosh --quiet
--host 127.0.0.1 --port 27017 --eval 'db.adminCommand("ping")') fails because
MongoDB is running with access control; update the healthcheck to run via
CMD-SHELL and include authentication options: add --username and --password
referencing the environment variables (MONGO_INITDB_ROOT_USERNAME and
MONGO_INITDB_ROOT_PASSWORD) and set --authenticationDatabase=admin so the ping
runs authenticated; ensure the wrapper uses CMD-SHELL to allow environment
variable expansion and return a zero exit code on success.
| hard: 65536 | ||
| healthcheck: | ||
| test: mongosh --quiet --host 127.0.0.1 --port 27017 --username $$MONGO_INITDB_ROOT_USERNAME --password $$MONGO_INITDB_ROOT_PASSWORD --authenticationDatabase admin --eval 'db.adminCommand("ping")' | ||
| test: mongosh --quiet --host 127.0.0.1 --port 27017 --eval 'db.adminCommand("ping")' |
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🧩 Analysis chain
🏁 Script executed:
# First, examine the docker-compose.yaml file to understand the MongoDB setup
cat -n docker-compose.yaml | head -110Repository: HardMax71/Integr8sCode
Length of output: 3904
🌐 Web query:
MongoDB 8.0 mongosh healthcheck with authentication credentials MONGO_INITDB_ROOT_USERNAME
💡 Result:
Use mongosh with --username/--password and --authenticationDatabase admin (the official mongo image creates the MONGO_INITDB_ROOT_USERNAME user in the admin auth DB). [1] In a Compose healthcheck, use CMD-SHELL and $$VAR so the variables are expanded inside the container:
services:
mongo:
image: mongo:8.0
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: example
healthcheck:
test:
[
"CMD-SHELL",
"mongosh --quiet --host localhost --port 27017 \
-u $$MONGO_INITDB_ROOT_USERNAME -p $$MONGO_INITDB_ROOT_PASSWORD \
--authenticationDatabase admin \
--eval \"db.runCommand({ ping: 1 }).ok\" | grep -q 1"
]
interval: 10s
timeout: 5s
retries: 5
start_period: 30sNotes:
--evaland--quietare standardmongoshoptions. [2]MONGO_INITDB_ROOT_*only take effect on first init (empty data dir); if you reuse a volume with existing data, the root user may not be created/changed. [1]
Sources:
[1] Docker Hub – official mongo image (MONGO_INITDB_ROOT_USERNAME/PASSWORD, created in admin, mongosh ... --authenticationDatabase admin)
[2] MongoDB Docs – mongosh options (--username, --password, --authenticationDatabase, --eval, --quiet)
🌐 Web query:
does db.adminCommand ping require authentication MongoDB access control enabled
💡 Result:
Yes. When MongoDB access control is enabled (security.authorization: enabled / --auth), clients must authenticate to run commands, and are then limited to actions allowed by their roles [1]. Since db.adminCommand({ ping: 1 }) is just the ping database command [2], running it unauthenticated will fail with an authentication/unauthorized error; once authenticated, it typically doesn’t require any special additional privileges beyond being logged in [1], [2].
Sources
[1] MongoDB Docs — Enable Access Control on Self-Managed Deployments (mongodb.com)
[2] MongoDB Docs — ping (database command) (mongodb.com)
Citations:
- 1: https://www.mongodb.com/docs/manual/tutorial/enable-authentication/?utm_source=openai
- 2: https://www.mongodb.com/docs/v8.0/reference/command/ping/?utm_source=openai
🌐 Web query:
mongosh exit code authentication failure command line credentials
💡 Result:
mongosh exit code on authentication failure
- When
mongoshcan’t connect/authenticate (e.g.,MongoServerError: Authentication failed), it exits with a non‑zero status (commonly1in automation scenarios). To make your scripts robust, explicitly control the exit code rather than relying on shell behavior.
Pass credentials correctly (CLI)
MongoDB’s docs recommend providing username, password, and the user’s authentication database:
mongosh --host <host> --port 27017 \
--username "<user>" --password \
--authenticationDatabase "<authDb>"--password with no value prompts securely. [1][2]
You can also use a URI (equivalent approach):
mongosh "mongodb://<user>:<pass>@<host>:27017/<db>?authSource=<authDb>"(You typically want authSource=admin when the user is stored in admin.) [2]
Ensure a deterministic exit code in scripts
- If you need to exit
mongoshwith a specific code from a script, useprocess.exit(code)(recommended workaround in automation). [3] quit(<code>)passing through the exit code had a known issue in earlymongosh, and was fixed so it works like the legacy shell in newer releases. [4]
Example “fail CI job if auth/connection fails” pattern:
mongosh "mongodb://<host>:27017/?authSource=<authDb>" \
--username "<user>" --password --quiet \
--eval 'db.runCommand({ ping: 1 }).ok ? process.exit(0) : process.exit(2)'Quick checklist if you see “Authentication failed”
- Wrong
--authenticationDatabase/authSourceis the most common cause; it must match the DB where the user was created. [2] - If using LDAP,
--authenticationDatabaseis typically$external. [2]
Sources: [1] [2] [3] [4]
Healthcheck on Line 63 will fail—MongoDB requires authentication but no credentials are provided.
With access control enabled via MONGO_INITDB_ROOT_USERNAME and MONGO_INITDB_ROOT_PASSWORD, the unauthenticated ping command will fail authentication and prevent dependent services from starting. Add credentials and use CMD-SHELL to ensure proper environment variable expansion.
🔧 Required fix
- test: mongosh --quiet --host 127.0.0.1 --port 27017 --eval 'db.adminCommand("ping")'
+ test: ["CMD-SHELL", "mongosh --quiet --host 127.0.0.1 --port 27017 --username \"$${MONGO_INITDB_ROOT_USERNAME}\" --password \"$${MONGO_INITDB_ROOT_PASSWORD}\" --authenticationDatabase admin --eval 'quit(db.adminCommand({ ping: 1 }).ok ? 0 : 2)'"]🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@docker-compose.yaml` at line 63, The healthcheck command (the test line
invoking mongosh --quiet --host 127.0.0.1 --port 27017 --eval
'db.adminCommand("ping")') fails because MongoDB is running with access control;
update the healthcheck to run via CMD-SHELL and include authentication options:
add --username and --password referencing the environment variables
(MONGO_INITDB_ROOT_USERNAME and MONGO_INITDB_ROOT_PASSWORD) and set
--authenticationDatabase=admin so the ping runs authenticated; ensure the
wrapper uses CMD-SHELL to allow environment variable expansion and return a zero
exit code on success.
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Summary by cubic
Updated MongoDB healthcheck in docker-compose to use an unauthenticated ping. This avoids failures when credentials aren’t ready and keeps the service healthy during startup.
Written for commit 5da3036. Summary will update on new commits.
Summary by CodeRabbit