Based on a requirement we had to move our old infrastructure to our enterprise scale landing zone in Azure, we moved our Docker swarm cluster with same configuration to new foundation setup and connectivity to our App URL’s are intermittent. We suspect, it could be some DNS issue within our containers which is not able to connect DNS regularly.We have not changed any configuration to our container images. We tried checking traces on the container level but didn’t get much details. Hence any kind support would be very much appreciated
1 Like
What kind of support do you expect when you write 5 sentences, have vague errors and share zero config.
My best guess would be an MTU issue, try pinging within the Docker overlay network with a payload > 1500 bytes.
hi @bluepuma77 ,
Thanks for your response . I will upload the details(architecture and configuration) asap
Configuration details
network
docker inspect frontend
[
{
"Name": "frontend",
"Id": "mj6ssbj9lwbv0x8p7ij19878f72",
"Created": "2024-01-08T13:01:56.175311851+01:00",
"Scope": "swarm",
"Driver": "overlay",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "10.0.0.0/24",
"Gateway": "10.0.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"356b18c444514048348f2cf496a395027428c9317b9530258b5f3e9ce3fc1cba": {
"Name": "abc-frontend.1.xxtv29s33ph9vjn2qj4gwxdlw",
"EndpointID": "ab72b043f479fb4a0e20560397car4dbe2005b6f30875d8381dca95bc7267ebc",
"MacAddress": "02:42:0a:00:00:08",
"IPv4Address": "10.0.0.8/24",
"IPv6Address": ""
},
"89045d9ff6889083a8ee93483e358bfed91dcc2f0e7a295411e9949d2a0702d9": {
"Name": "observability.ms7upvp5b1tdert5oikfjq8og.rz91wd09unda9c7e9mxwrflsu",
"EndpointID": "e8fa8f50b7917ceada1bb2639c9fd124e9471a0d62c2cf137c880a363e27a2fe",
"MacAddress": "02:42:0a:00:00:09",
"IPv4Address": "10.0.0.9/24",
"IPv6Address": ""
},
"a4612d99c588d0f44518ae694db13655c3685d7e947caea6825d6160385f0dfe": {
"Name": "abc-contracts.1.vfiaoar2gh2uig8i73eonb7tl",
"EndpointID": "fc5f7bd03e0f3531b1bc295rf5f7fcc8615c488902abe5838fc2b360bff54e3e",
"MacAddress": "02:42:0a:00:00:0c",
"IPv4Address": "10.0.0.12/24",
"IPv6Address": ""
},
"lb-frontend": {
"Name": "frontend-endpoint",
"EndpointID": "73ac5ebfc0d2161316798181de15ba320c9eb579fd11c023ee002d509fdd4e77",
"MacAddress": "02:42:0a:00:00:0d",
"IPv4Address": "10.0.0.13/24",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.driver.overlay.vxlanid_list": "4097"
},
"Labels": {},
"Peers": [
{
"Name": "0ba0417fd379",
"IP": "XX.XX.XX.XX"
},
{
"Name": "15e294704fd4",
"IP": "XX.XX.XX.XX"
},
{
"Name": "ef37ab323d29",
"IP": "XX.XX.XX.XX"
},
{
"Name": "1f6a198ded8d",
"IP": "XX.XX.XX.XX"
},
{
"Name": "cc6701d6decc",
"IP": "XX.XX.XX.XX"
},
{
"Name": "99cd04ecd3f5",
"IP": "XX.XX.XX.XX"
},
{
"Name": "550645b082b1",
"IP": "XX.XX.XX.XX"
},
{
"Name": "5b2df15fcf64",
"IP": "XX.XX.XX.XX"
}
]
}
]
Service
docker service inspect abc-fe_abc-fe
[
{
"ID": "h648oxtgt1tjad906tbwc9njm",
"Version": {
"Index": 53842370
},
"CreatedAt": "2023-04-27T11:32:01.0637873Z",
"UpdatedAt": "2024-02-19T08:50:14.19927354Z",
"Spec": {
"Name": "abc-fe_abc-fe",
"Labels": {
"com.docker.stack.image": "abc-fe:1.1999.0",
"com.docker.stack.namespace": "abc-fe",
"traefik.docker.network": "proxy",
"traefik.frontend.headers.STSIncludeSubdomains": "true",
"traefik.frontend.headers.STSPreload": "true",
"traefik.frontend.headers.STSSeconds": "31536000",
"traefik.frontend.headers.frameDeny": "true",
"traefik.frontend.rule": "Host:test-abc.dummy.com",
"traefik.http.middlewares.testHeader.headers.customrequestheaders.Pragma": "no-cache",
"traefik.http.middlewares.testHeader.headers.customrequestheaders.browserXssFilter": "true",
"traefik.http.middlewares.testHeader.headers.customrequestheaders.contentTypeNosniff": "true",
"traefik.port": "80"
},
"TaskTemplate": {
"ContainerSpec": {
"Image": "abc-fe:1.1999.0@sha256:sdasda77a0",
"Labels": {
"com.docker.stack.namespace": "abc-fe"
},
"Env": [
],
"Privileges": {
"CredentialSpec": null,
"SELinuxContext": null
},
"Mounts": [
{
"Type": "bind",
"Source": "/etc/localtime",
"Target": "/etc/localtime",
"ReadOnly": true
}
],
"StopGracePeriod": 10000000000,
"DNSConfig": {},
"Secrets": [
],
"Isolation": "default"
},
"Resources": {
"Limits": {
"NanoCPUs": 2000000000,
"MemoryBytes": 1073741824
},
"Reservations": {
"MemoryBytes": 1073741824
}
},
"RestartPolicy": {
"Condition": "on-failure",
"Delay": 5000000000,
"MaxAttempts": 0,
"Window": 380000000000
},
"Placement": {
"Constraints": [
"node.labels.private == true"
],
"Platforms": [
{
"Architecture": "amd64",
"OS": "linux"
}
]
},
"Networks": [
{
"Target": "mj6ssbj9lwbv0srwt8p7ij328f72",
"Aliases": [
"abc-fe"
]
},
{
"Target": "mj6ssbj9lwbv0srwt8p7ij328f72",
"Aliases": [
"abc-fe"
]
}
],
"ForceUpdate": 3,
"Runtime": "container"
},
"Mode": {
"Replicated": {
"Replicas": 1
}
},
"UpdateConfig": {
"Parallelism": 1,
"Delay": 10000000000,
"FailureAction": "rollback",
"Monitor": 5000000000,
"MaxFailureRatio": 0,
"Order": "stop-first"
},
"RollbackConfig": {
"Parallelism": 1,
"FailureAction": "pause",
"Monitor": 5000000000,
"MaxFailureRatio": 0,
"Order": "stop-first"
},
"EndpointSpec": {
"Mode": "vip"
}
},
"PreviousSpec": {
"Name": "abc-fe_abc-fe",
"Labels": {
"com.docker.stack.image": "abc-fe:1.1998.0",
"com.docker.stack.namespace": "abc-fe",
"traefik.docker.network": "proxy",
"traefik.frontend.headers.STSIncludeSubdomains": "true",
"traefik.frontend.headers.STSPreload": "true",
"traefik.frontend.headers.STSSeconds": "31536000",
"traefik.frontend.headers.frameDeny": "true",
"traefik.frontend.rule": "Host:test-abc.dummy.com",
"traefik.http.middlewares.testHeader.headers.customrequestheaders.Pragma": "no-cache",
"traefik.http.middlewares.testHeader.headers.customrequestheaders.browserXssFilter": "true",
"traefik.http.middlewares.testHeader.headers.customrequestheaders.contentTypeNosniff": "true",
"traefik.port": "80"
},
"TaskTemplate": {
"ContainerSpec": {
"Image": "abc-fe:1.1998.0@sha256:ggdjjjb6fc",
"Labels": {
"com.docker.stack.namespace": "abc-fe"
},
"Env": [
],
"Privileges": {
"CredentialSpec": null,
"SELinuxContext": null
},
"Mounts": [
{
"Type": "bind",
"Source": "/etc/localtime",
"Target": "/etc/localtime",
"ReadOnly": true
}
],
"Secrets": [
],
"Isolation": "default"
},
"Resources": {
"Limits": {
"NanoCPUs": 2000000000,
"MemoryBytes": 1073741824
},
"Reservations": {
"MemoryBytes": 1073741824
}
},
"RestartPolicy": {
"Condition": "on-failure",
"Delay": 5000000000,
"MaxAttempts": 0,
"Window": 380000000000
},
"Placement": {
"Constraints": [
"node.labels.private == true"
],
"Platforms": [
{
"Architecture": "amd64",
"OS": "linux"
}
]
},
"Networks": [
{
"Target": "mj6ssbj9lwjhjjksiiwx8p7ij198f72",
"Aliases": [
"abc-fe"
]
},
{
"Target": "s6st369977999gy9gmw5241",
"Aliases": [
"abc-fe"
]
}
],
"ForceUpdate": 3,
"Runtime": "container"
},
"Mode": {
"Replicated": {
"Replicas": 1
}
},
"UpdateConfig": {
"Parallelism": 1,
"Delay": 10000000000,
"FailureAction": "rollback",
"MaxFailureRatio": 0,
"Order": "stop-first"
},
"EndpointSpec": {
"Mode": "vip"
}
},
"Endpoint": {
"Spec": {
"Mode": "vip"
},
"VirtualIPs": [
{
"NetworkID": "mj6ssbj9l876tgsquwbseap7ij198f72",
"Addr": "10.0.0.202/24"
},
{
"NetworkID": "s6st3622yterwsdtyavd1gy9gmw5241",
"Addr": "10.0.3.44/24"
}
]
},
"UpdateStatus": {
"State": "completed",
"StartedAt": "2024-02-19T08:48:45.442411538Z",
"CompletedAt": "2024-02-19T08:50:14.19923734Z",
"Message": "update completed"
}
}
]
hi @bluepuma77 , I have enriched the details .
Thanks
Usually we share docker-compose.yml files here, they are a bit more human readable that docker inspect JSON.