moby / moby/swarmkit

Docker Swarm log issue caused by failure to remove an old container after docker stack deploy

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Description

I have a stack for Confluent Kafka (including brokers, connectors, etc..).
I've restarted the stack (docker stack deploy) and run docker service logs on one of the services (cp-kafka_cp-kafka-connect1) and instead of getting the newest logs, I got the previous ones, meaning the ones that the previous container had (a container that the service task should have stopped and removed)

After the restart:

➤ docker service logs -f cp-kafka_cp-kafka-connect1
cp-kafka_cp-kafka-connect1.1.rjmam9btsc7l@cluster01 | Creating Secret File...
...
cp-kafka_cp-kafka-connect1.1.rjmam9btsc7l@cluster01 | [2021-12-02 16:51:12,072] INFO records [] (uk.co.org.task.Externalprojectconnector.ExternalProjectSourceTask)

I checked where the container for this single replica service got deployed, ssh to the VM and saw that Docker Swarm only stopped the old container, but it didn't remove it:

Notice the 'exited' cp-kafka_cp-kafka-connect1.1.rjmam9btsc7lwwxelrd81bz8w container which should have been removed:

➤ docker ps -a |grep connect1
afc2c62ad55a confluentinc/cp-kafka-connect:latest "/connect/setup_and_…" About an hour ago Up About an hour (healthy) 8083/tcp, 9092/tcp cp-kafka_cp-kafka-connect1.1.p2wuzvcns97nywkcl6h50nfer
911d6f22a2d3 confluentinc/cp-kafka-connect:latest "/connect/setup_and_…" 4 hours ago Exited (137) About an hour ago cp-kafka_cp-kafka-connect1.1.rjmam9btsc7lwwxelrd81bz8w

It is clear that instead of logs from cp-kafka_cp-kafka-connect1.1.p2wuzvcns97nywkcl6h50nfer I got logs from cp-kafka_cp-kafka-connect1.1.rjmam9btsc7lwwxelrd81bz8w

I then remove the 'exited' container:
➤ docker rm cp-kafka_cp-kafka-connect1.1.rjmam9btsc7lwwxelrd81bz8w cp-kafka_cp-kafka-connect1.1.rjmam9btsc7lwwxelrd81bz8w

And again run: docker service logs cp-kafka_cp-kafka-connect1
This time it was showing the latest logs as expected:


2021-12-02T16:52:04.443428257Z cp-kafka_cp-kafka-connect1.1.p2wuzvcns97n@cluster01 | Creating Secret File...
2021-12-02T16:52:04.446932866Z cp-kafka_cp-kafka-connect1.1.p2wuzvcns97n@cluster01 | Starting Kafka Connect...
...
2021-12-02T18:24:32.230561770Z cp-kafka_cp-kafka-connect1.1.p2wuzvcns97n@cluster01 | [2021-12-02 18:24:32,230] INFO records [] (uk.co.org.task.Externalprojectconnector.ExternalProjectSourceTask)

➤ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
mllkj8tx019ml4jhuelduhmju * cluster01 Ready Active Reachable 19.03.7
p6vdnwc7ahaogs09gfif70m2l cluster02 Ready Active Leader 19.03.7
vstjjddqusu2nw5rztt967mtq cluster03 Ready Active Reachable 19.03.7

➤ docker version
Client: Docker Engine - Community
Version: 19.03.6
API version: 1.40
Go version: go1.12.16
Git commit: 369ce74a3c
Built: Thu Feb 13 01:27:49 2020
OS/Arch: linux/amd64
Experimental: false

Server: Docker Engine - Community
Engine:
Version: 19.03.7
API version: 1.40 (minimum version 1.12)
Go version: go1.12.17
Git commit: 7141c199a2
Built: Wed Mar 4 01:21:08 2020
OS/Arch: linux/amd64
Experimental: true
containerd:
Version: 1.2.13
GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc:
Version: 1.0.0-rc10
GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
Version: 0.18.0
GitCommit: fec3683

➤ docker info
Client:
Debug Mode: false

Server:
Containers: 19
Running: 19
Paused: 0
Stopped: 0
Images: 23
Server Version: 19.03.7
Storage Driver: overlay2
Backing Filesystem:
Supports d_type: true
Native Overlay Diff: true
Logging Driver: local
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: active
NodeID: mllkj8tx019ml4jhuelduhmju
Is Manager: true
ClusterID: pxrog2yr4vbj8tc0ndhf3j680
Managers: 3
Nodes: 5
Default Address Pool: 10.0.0.0/8
SubnetSize: 24
Data Path Port: 4789
Orchestration:
Task History Retention Limit: 5
Raft:
Snapshot Interval: 10000
Number of Old Snapshots to Retain: 0
Heartbeat Tick: 1
Election Tick: 10
Dispatcher:
Heartbeat Period: 5 seconds
CA Configuration:
Expiry Duration: 3 months
Force Rotate: 0
Autolock Managers: false
Root Rotation In Progress: false
Node Address: 10.12.1.215
Manager Addresses:
10.12.1.215:2377
10.12.1.216:2377
10.12.1.222:2377
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
init version: fec3683
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 4.15.0-147-generic
Operating System: Ubuntu 18.04.4 LTS
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 23.54GiB
Name: cluster01
ID: JBN4:SSQD:K72A:USUE:3UPI:OG72:3IXQ:E7JJ:Q2RG:QATP:2RCQ:FEUW
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: true
Insecure Registries:
nexus:9082
nexus:9083
127.0.0.0/8
Live Restore Enabled: false

WARNING: No swap limit support

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the behavior with docker stack deploy and docker service logs using the reported single-replica service setup. Compare the task and container lifecycle after a restart, including whether the exited container remains until docker rm is run. The reported Docker Engine, Swarm, and Ubuntu versions provide the initial test environment; done means identifying why stale containers are retained or logs select them and adding a verified fix or regression coverage.

Written by the indexing model from the issue text.

Assessment

Tech stack
docker
Domain
devops, distributed-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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