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This manual is mainly about how to use native network for iSulad community developers and users.
The code of native network code is only exists in the master branch of lcr and iSulad. It is isolated by compilation macro ENABLE_NATIVE_NETWORK, and it is enabled by default. For the installation of the dependent environment of iSulad, please refer to the document docs/build_docs/guide/build_guide_zh.md, and it will not be repeated here. The following only describes the compilation of lcr and iSulad.
# build and install lcr
$ git clone https://gitee.com/openeuler/lcr.git
$ cd lcr
# master branch
$ mkdir build
$ cd build
$ cmake ..
$ make -j $(nproc)
$ make install
# build and install iSulad
$ git clone https://gitee.com/openeuler/iSulad.git
$ cd iSulad
# master branch
$ mkdir build
$ cd build
# enable ENABLE_NATIVE_NETWORK by default
$ cmake -DENABLE_NATIVE_NETWORK=ON ..
$ make -j $(nproc)
$ make install
The natvie netwrok needs to install CNI plugin binary. The open source repository address is https://github.com/containernetworking/plugins. It is recommended to install the CNI plugin v0.9.0 version and above. Here is an example of the latest v1.3.0 version when the manual was released.
$ wget https://github.com/containernetworking/plugins/releases/download/v1.3.0/cni-plugins-linux-amd64-v1.3.0.tgz
$ mkdir -p /opt/cni/bin/
$ tar -zxvf cni-plugins-linux-amd64-v1.3.0.tgz -C /opt/cni/bin/
The following table lists the iSulad version, supported CNI specification, and recommended network plugin version:
| iSulad version | CNI spec version | cni-plugins version |
|---|---|---|
| v2.1.3 and earlier | spec-v0.4.0 | v0.9.1 |
| v2.1.4 | spec-v1.0.0 | v1.3.0 |
Modify isulad daemon.json and config cni
$ vim /etc/isulad/daemon.json
...
"cni-bin-dir": "/opt/cni/bin",
"cni-conf-dir": "/etc/cni/net.d",
...
# start isulad
$ isulad
cni-bin-dir is the cni binary directory. If it is not configured, the default value is /opt/cni/bin. cni-conf-dir is the network conflist directory. If it is not configured, the default value is /etc/cni/net.d. If you want to use default value, you can start isulad directly without config the daemon.json.
The use of native network is similar to that of docker. Here are some simple operation.
$ isula network create cni0
cni0
$ isula network ls
NAME VERSION PLUGIN
cni0 1.0.0 bridge,portmap,firewall
$ isula network inspect cni0
[
{
"cniVersion": 1.0.0,
"name": cni0,
"plugins": [
{
"type": bridge,
"bridge": isula-br0,
"isGateway": true,
"ipMasq": true,
"hairpinMode": true,
"ipam": {
"type": host-local,
"routes": [
{
"dst": 0.0.0.0/0
}
],
"ranges": [
[
{
"subnet": 192.168.0.0/24,
"gateway": 192.168.0.1
}
]
]
}
},
{
"type": portmap,
"capabilities": {
"portMappings": true
}
},
{
"type": firewall
}
]
}
]
$ isula run -tid --net cni0 --name test busybox sh
3a933b6107114fe684393441ead8addc8994258dab4c982aedb1ea203f0df7d9
$ isula ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3a933b610711 busybox "sh" 9 seconds ago Up 9 seconds test
$ isula inspect test
...
"NetworkSettings": {
"Bridge": "",
"SandboxID": "",
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"CNIPorts": [],
"SandboxKey": "/var/run/netns/isulacni-e93b9ac71757d204",
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Activation": true,
"Networks": {
"cni0": {
"Links": [],
"Alias": [],
"NetworkID": "",
"EndpointID": "",
"Gateway": "192.168.0.1",
"IPAddress": "192.168.0.4",
"IPPrefixLen": 24,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "d2:74:53:c5:9c:be",
"IFName": "eth0",
"DriverOpts": {}
}
}
}
...
$ ping 192.168.0.4
PING 192.168.0.4 (192.168.0.4) 56(84) bytes of data.
64 bytes from 192.168.0.4: icmp_seq=1 ttl=64 time=0.080 ms
64 bytes from 192.168.0.4: icmp_seq=2 ttl=64 time=0.038 ms
64 bytes from 192.168.0.4: icmp_seq=3 ttl=64 time=0.038 ms
^C
--- 192.168.0.4 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2084ms
rtt min/avg/max/mdev = 0.038/0.052/0.080/0.019 ms
$ isula rm -f test
3a933b6107114fe684393441ead8addc8994258dab4c982aedb1ea203f0df7d9
$ isula network rm cni0
cni0
$ isula network ls
NAME VERSION PLUGIN
Create a native network.
isulad will create a network configuration file that conforms to the cni standard and store it in the cni-conf-dir directory.
isula network create [OPTIONS] [NETWORK]
| Options | Description |
|---|---|
| -d, --driver | Driver to manager the network (default "bridge"), and only support bridge mode |
| --gateway | IPv4 or IPv6 gateway for the subnet. When specifying the gateway parameter, you must specify the subnet parameter. If no gateway is specified, the first IP in the subnet is used as the gateway |
| --internal | Restrict external access from this network |
| --subnet | Subnet in CIDR format |
Query one or more native networks that have been created.
isula network inspect [OPTIONS] NETWORK [NETWORK...]
| Options | Description |
|---|---|
| -f, --format | Format the output using the given go template |
List all created native networks.
isula network ls [OPTIONS]
| Options | Description |
|---|---|
| -f, --filter | Filter output based on conditions provided (specify string matching name or plugin) |
| -q, --quiet | Only display network names |
Deleting one or more native networks that have been created, and it will also delete the corresponding bridge devices and network configuration files.
isula network rm [OPTIONS] NETWORK [NETWORK...]
None
Add the corresponding network parameters, add network capabilities to the container when creating/starting the container.
isula run [OPTIONS] ROOTFS|IMAGE [COMMAND] [ARG...]
Show only network-related parameters.
| Options | Description |
|---|---|
| --expose | Expose a port or a range of ports |
| --net, --network | Connect a container to a network |
| -p, --publish | Publish a container's port(s) to host with format <hostport>:<container port>
|
| -P, --publish-all | Publish all exposed ports to random ports |
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