I am rather new to Kubernetes and I am trying to start a kubernetes cluster and deploy some pods .
I have a image I want to build in order to perfrom a deployment of it so I am trying to build it's dockerfile but one of the steps in the dockerfile tries to access golobal resource :
curl --silent --location https://rpm.nodesource.com/setup_7.x
I keep getting this error message :
Connecting to rpm.nodesource.com (rpm.nodesource.com)|13.32.153.164|:443... failed: Connection timed out.
Connecting to rpm.nodesource.com (rpm.nodesource.com)|2600:9000:2116:2800:16:cdcc:51c0:93a1|:443... failed: Network is unreachable
I can see that container was able to resolve the dns name ( based on the IP it prints out in the message ) but is unable to access it.
my /etc/resolv.conf is :
search default.svc.cluster.local svc.cluster.local
nameserver 10.82.67.3
nameserver 10.233.0.3
nameserver 8.8.8.8
options ndots:2 timeout:2 attempts:2
my docker version is 17.05.0-ce
my OS is redhat 7.4
this is the Network part of the docker inpect command of the container :
"NetworkSettings": {
"Bridge": "",
"SandboxID": "a4a4c93d0ea19b48b84ef8556678f458405b32238542ede30a78229f82b55a12",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/a4a4c93d0ea1",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "66d74579ee50bc8289dfc58235188e262ebf707f2f0ae0ccb640524e6e9d3f22",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "655da32f8ecab7a4bba100594a1e242c60b27304e9937ae5192857942b661603",
"EndpointID": "66d74579ee50bc8289dfc58235188e262ebf707f2f0ae0ccb640524e6e9d3f22",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02"
}
}
}
any help would be appriciated
Related
I cannnot use network_mode: host in docker in windows 10. I try difference images, it cannot too.
I post my docker-compose.yaml below.
docker-compose.yaml
homeassistant2:
container_name: hass2
image: homeassistant/home-assistant:0.112.2
network_mode: host
But when set the port mapping,everthing is fine
ports:
- '8123:8123'
# network_mode: host
My environmet is windows 10
I get some information from command docker inspect
I post some of it about network settings below.
"NetworkSettings": {
"Bridge": "",
"SandboxID": "f084a1e7e4966f0bff678e4120c1bcbc7afdd1c55d5164b1dc4a606470c43bcc",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/default",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Networks": {
"host": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "656b532cdc48c9e34e616ec0a38ef944c5e52e2dfca506ca99e53b4b16206000",
"EndpointID": "",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": null
}
}
}
}
]
If I need provide something else to analyze the problem, please tell me.
When running Docker under Windows or MacOS, you're actually running Docker in a Linux virtual machine. When you set network_mode: host, you're connecting the container to the network environment of the virtual machine. This is seldom going to be useful.
network_mode: host is really only going to make sense when running Docker natively on Linux.
You're better off sticking with port publishing.
I have this config (using the go-dockerclient https://github.com/fsouza/go-dockerclient) for a container but it only opens the tcp port when running the container:
...
StartConfig: docker.HostConfig{
PortBindings: map[docker.Port][]docker.PortBinding{
"53/tcp": {{HostIP: "0.0.0.0", HostPort: "1053"}},
"53/udp": {{HostIP: "0.0.0.0", HostPort: "1053"}},
},
I tried in every possible way without luck. When I run the container using the cmd it works as expected:
docker run -d \
-p 0.0.0.0:1053:53/udp \
-p 0.0.0.0:1053:53/tcp ...
Any ideas what am I doing wrong here?
Container inspect output:
"NetworkSettings": {
"Bridge": "",
"SandboxID": "4bdea4ccda50aaf8a3117098fdd2073943af43e8d991ddd7a0be425c5599dfbd",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"53/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "1053"
}
]
},
"SandboxKey": "/var/run/docker/netns/4bdea4ccda50",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "1796f8bda73d13d354bcd8bafaf6c1f4ff1491582c3985f6b653ccc6b2226e01",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:03",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "fb85e54ede4e18ae48e4c889d169d2d4cd8b2087a8c9691e094a431cb6a7eb43",
"EndpointID": "1796f8bda73d13d354bcd8bafaf6c1f4ff1491582c3985f6b653ccc6b2226e01",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:03"
}
}
}
I have tried the following example which worked as expected for me, the example as shown below:
The docker image link: https://github.com/sameersbn/docker-bind
Maybe the issue is related with the image that you have?
package main
import (
docker "github.com/fsouza/go-dockerclient"
)
func main() {
endpoint := "unix:///var/run/docker.sock"
client, err := docker.NewClient(endpoint)
if err != nil {
panic(err)
}
container, err := client.CreateContainer(docker.CreateContainerOptions{
Name: "my-container",
Config: &docker.Config{Image: "sameersbn/bind:9.11.3-20190113"},
HostConfig: &docker.HostConfig{
PortBindings: map[docker.Port][]docker.PortBinding{
"53/tcp": {{HostIP: "0.0.0.0", HostPort: "1053"}},
"53/udp": {{HostIP: "0.0.0.0", HostPort: "1053"}},
},
},
},
)
client.StartContainer(container.ID, nil)
}
Docker inspect results:
"Ports": {
"10000/tcp": null,
"53/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "1053"
}
],
"53/udp": [
{
"HostIp": "0.0.0.0",
"HostPort": "1053"
}
]
},
Make sure that you have this in your Dockerfile as by default EXPOSE assumes TCP as described in here:
EXPOSE 53/udp 53/tcp
First step: I loaded the Images from a local drive:
docker load -i postgres10.tar
docker load -i drupaldrush1.tar
Second step: I started the containers:
docker run -p5432:5432 postgres:10
docker run -p8081:8081 drupaldrush:1
Third step: displaying containers:
docker ps
results in:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b77bcc79d599 drupaldrush:1 "docker-php-entrypoi…" 33 seconds ago Up 32 seconds 80/tcp, 0.0.0.0:8081->8081/tcp flamboyant_easley
97b9ba5f2779 postgres:10 "docker-entrypoint.s…" About a minute ago Up About a minute 0.0.0.0:5432->5432/tcp competent_fermat
BUT container is not available under: localhost:8081
Fourth step: inspecting container:
docker inspect flamboyant_easley
resulting in (among other Information):
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {
"8081/tcp": [
{
"HostIp": "",
"HostPort": "8081"
}
]
},
and
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "d5e552bf9c57050fe2debfc7d38a784580309fa0b72c4854a563e78295128912",
"EndpointID": "f61b02c5997b2e391add348686f658b4c596dd60495365cee0fee539743d4792",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.3",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
Problem: The container is not available under localhost:8081 and not under 172.17.0.3: 8081 or 172.17.0.1:8081
Question: What do I have to do to make it run under localhost:8081?
The problems came from Docker for Windows. Now I got a Linux Laptop and everything works just fine.
I am trying to setup docker on one of my servers (gitlab instance), but I cannot get the instance to work correctly. Especially the network is the thing I cannot get correct.
This is the command I use to start the docker:
docker run --name gitlab --hostname gitlab -p 32790:32790 -e GITLAB_OMNIBUS_CONFIG="gitlab_rails['lfs_enabled'] = true; external_url = 'http://gitlab:32790';" gitlab/gitlab-ce:10.3.3-ce.0
This is the network info I get back from the docker:
"NetworkSettings": {
"Bridge": "",
"SandboxID": "8646b3f0e8106eb9e8ea574ce69b48c1782b75f3f3aab52d2d66d8972ac4aa4b",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"22/tcp": null,
"32790/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "32790"
}
],
"443/tcp": null,
"80/tcp": null
},
"SandboxKey": "/var/run/docker/netns/8646b3f0e810",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "a400fd17542a2be0b7e6ff2e96770c6890f61e91324c3970a8c6425904fbf0b0",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "924e23784ebcaaf5cf27a91259095c1109c28a09d928e2425b794015c129b736",
"EndpointID": "a400fd17542a2be0b7e6ff2e96770c6890f61e91324c3970a8c6425904fbf0b0",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
The ideal result would be that I can both connect through an IP address, and through http://gitlab:32790
But I cannot get it to work correctly...
Here is my docker-compose file:
version: '2'
services:
app:
image: mykiwi/ttrss
database:
image: postgres:10-alpine
environment:
- POSTGRES_USER=ttrss
- POSTGRES_PASSWORD=ttrss
volumes:
- database:/var/lib/postgresql/data
volumes:
database: ~
But when I inspect my main container, there is no ip address:
$ docker inspect 40f78d12c178
...
"NetworkSettings": {
"Bridge": "",
"SandboxID": "70479dc6e987e744e376f6e4222e8d26174b724b686da52924a7e539ef4d4f0c",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/70479dc6e987",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Networks": {
"none": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "2c6c546b04398c4b4c7b9e52fdb16b89aacfea33b9038b6aa90b4b44fbd99ac7",
"EndpointID": "ac4da8b1b38118732a6e9e99a0ba56b271e6810afd78975c5f329185cf047bf7",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": null
}
}
}
}
]
I run it through rancher, is it related ?
Rancher uses CNI drivers for networking and so the network is "none" as far as Docker is concerned and no IP addresses or port info appears in Docker inspect. You can get it from the metadata service.