Docker swarm can't resolve service name on other nodes - docker

Question

I had a small working docker swarm on google cloud platform.
There are just two nodes, one with nginx and php, the other one with mysql.
Right now it seems that from master node I can't connect to the mysql on the worker node.
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
Same problem also with ping from a shell inside the container.
I've used --advertise-addr flag when init the swarm:
docker swarm init --advertise-addr 10.156.0.3
Then I've successfully join the swarm from the 2nd node:
docker swarm join --token my-token 10.156.0.3:2377
Also the deploy is successful
docker stack deploy --compose-file docker-compose.yml test
Creating network test_default
Creating service test_mysql
Creating service test_web
Creating service test_app
(in docker-compose.yml there is no network definition, I'm using the docker default)
Nodes:
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
oz1ebgrp1a68brxi0nd1gdr2k mysql-001 Ready Active 18.03.1-ce
ndy11zyxi0wym8mjmgh8op1ni * app-001 Ready Active Leader 18.03.1-ce
docker stack ps test
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
9afwjgtpy8lc test_app.1 127.0.0.1:5000/app:latest app-001 Running Running 8 minutes ago
mgajupmcai0t test_web.1 127.0.0.1:5000/web:latest app-001 Running Running 8 minutes ago
s17jvkukahl7 test_mysql.1 mysql:5.7 mysql-001 Running Running 8 minutes ago
docker networks:
NETWORK ID NAME DRIVER SCOPE
9084b39892f4 bridge bridge local
ofqtewx039fl test_default overlay swarm
5cc9d4554bea docker_gwbridge bridge local
97fbd06a23b5 host host local
x8f408klk2ms ingress overlay swarm
ca1b849ea73a none null local
Here is my docker info
Containers: 12
Running: 3
Paused: 0
Stopped: 9
Images: 35
Server Version: 18.03.1-ce
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: active
NodeID: ndy11zyxi0wym8mjmgh8op1ni
Is Manager: true
ClusterID: q23l1v6dav3u4anqqu51nwx0r
Managers: 1
Nodes: 2
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
Total Memory: 14.09GiB
CA Configuration:
Expiry Duration: 3 months
Force Rotate: 0
Autolock Managers: false
Root Rotation In Progress: false
Node Address: 10.156.0.3
Manager Addresses:
10.156.0.3:2377
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 773c489c9c1b21a6d78b5c538cd395416ec50f88
runc version: 4fc53a81fb7c994640722ac585fa9ca548971871
init version: 949e6fa
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 4.13.0-1019-gcp
Operating System: Ubuntu 16.04.4 LTS
OSType: linux
Architecture: x86_64
CPUs: 16
Total Memory: 14.09GiB
Name: app-001
ID: IWKK:NWRJ:HKAQ:3JSQ:7H3L:2WXC:IIJ7:OEKB:4ARR:T7FY:VAWR:HOPL
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
This swarm was working fine few weeks ago. I didn't need this application for few weeks so I've turned off all the machines. Meanwhile swarm-node.crt expired and so today when I've turned on the machine I had to remove the service and the swarm and recreate it from scratch. The result is that I can't connect from container on one node to container on the other node.
Any help will be appreciated.
UPDATE:
here is docker-compose.yml
version: '3'
services:
web:
image: 127.0.0.1:5000/web
build:
context: ./web
volumes:
- ./test:/var/www
build:
ports:
- 80:80
links:
- app
deploy:
mode: replicated
replicas: 1
placement:
constraints:
- node.hostname == app-001
app:
image: 127.0.0.1:5000/app
build:
context: ./app
volumes:
- ./test:/var/www
depends_on:
- mysql
deploy:
mode: replicated
replicas: 1
placement:
constraints:
- node.hostname == app-001
mysql:
image: mysql:5.7
volumes:
- /mnt/disks/ssd-001/mysql:/var/lib/mysql
- /mnt/disks/buckets/common-storage-001/backup/mysql:/backup
environment:
- "MYSQL_DATABASE=test"
- "MYSQL_USER=test"
- "MYSQL_PASSWORD=*****"
- "MYSQL_ROOT_PASSWORD=*****"
command: mysqld --key-buffer-size=32M --max-allowed-packet=16M --myisam-recover-options=FORCE,BACKUP --tmp-table-size=32M --query-cache-type=0 --query-cache-size=0 --max-heap-table-size=32M --max-connections=500 --thread-cache-size=50 --innodb-flush-method=O_DIRECT --innodb-log-file-size=512M --innodb-buffer-pool-size=16G --open-files-limit=65535
deploy:
mode: replicated
replicas: 1
placement:
constraints:
- node.hostname == mysql-001