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121 lines
3.9 KiB
121 lines
3.9 KiB
/*
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Copyright © 2020 The k3d Author(s)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package docker
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import (
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"context"
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"fmt"
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"net"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/filters"
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"github.com/docker/docker/client"
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k3d "github.com/rancher/k3d/v3/pkg/types"
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log "github.com/sirupsen/logrus"
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)
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// CreateNetworkIfNotPresent creates a new docker network
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// @return: network name, exists, error
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func (d Docker) CreateNetworkIfNotPresent(ctx context.Context, name string) (string, bool, error) {
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// (0) create new docker client
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docker, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
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if err != nil {
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log.Errorln("Failed to create docker client")
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return "", false, err
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}
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defer docker.Close()
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// (1) configure list filters
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filter := filters.NewArgs()
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filter.Add("name", fmt.Sprintf("^/?%s$", name)) // regex filtering for exact name match
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// (2) get filtered list of networks
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networkList, err := docker.NetworkList(ctx, types.NetworkListOptions{
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Filters: filter,
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})
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if err != nil {
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log.Errorln("Failed to list docker networks")
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return "", false, err
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}
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// (2.1) If possible, return an existing network
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if len(networkList) > 1 {
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log.Warnf("Found %d networks instead of only one. Choosing the first one: '%s'.", len(networkList), networkList[0].ID)
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}
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if len(networkList) > 0 {
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log.Infof("Network with name '%s' already exists with ID '%s'", name, networkList[0].ID)
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return networkList[0].ID, true, nil
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}
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// (3) Create a new network
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network, err := docker.NetworkCreate(ctx, name, types.NetworkCreate{
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Labels: k3d.DefaultObjectLabels,
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})
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if err != nil {
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log.Errorln("Failed to create network")
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return "", false, err
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}
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log.Infof("Created network '%s'", name)
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return network.ID, false, nil
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}
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// DeleteNetwork deletes a network
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func (d Docker) DeleteNetwork(ctx context.Context, ID string) error {
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// (0) create new docker client
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docker, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
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if err != nil {
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log.Errorln("Failed to create docker client")
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return err
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}
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defer docker.Close()
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// (3) delete network
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return docker.NetworkRemove(ctx, ID)
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}
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// GetNetwork gets information about a network by its ID
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func GetNetwork(ctx context.Context, ID string) (types.NetworkResource, error) {
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docker, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
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if err != nil {
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log.Errorln("Failed to create docker client")
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return types.NetworkResource{}, err
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}
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defer docker.Close()
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return docker.NetworkInspect(ctx, ID, types.NetworkInspectOptions{})
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}
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// GetGatewayIP returns the IP of the network gateway
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func GetGatewayIP(ctx context.Context, network string) (net.IP, error) {
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bridgeNetwork, err := GetNetwork(ctx, network)
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if err != nil {
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log.Errorf("Failed to get bridge network with name '%s'", network)
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return nil, err
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}
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gatewayIP := net.ParseIP(bridgeNetwork.IPAM.Config[0].Gateway)
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return gatewayIP, nil
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}
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