mirror of
https://github.com/containers/podman.git
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dc7ae31171
add the ability for the podman remote client to use a configuration file which describes its connections. users can now define a connection the configuration and then call it by name like: podman-remote -c connection1 and the destination and user will be derived from the configuration file. if no -c is provided, we look for a connection in the configuration file designated as 'default'. If the configuration file has only one connection, it will be deemed the 'default'. Signed-off-by: baude <bbaude@redhat.com>
94 lines
3.1 KiB
Go
94 lines
3.1 KiB
Go
// +build remoteclient
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package adapter
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import (
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"fmt"
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"os"
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"github.com/containers/libpod/cmd/podman/remoteclientconfig"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/varlink/go/varlink"
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)
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var remoteEndpoint *Endpoint
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func (r RemoteRuntime) RemoteEndpoint() (remoteEndpoint *Endpoint, err error) {
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remoteConfigConnections, _ := remoteclientconfig.ReadRemoteConfig(r.config)
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// If the user defines an env variable for podman_varlink_bridge
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// we use that as passed.
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if bridge := os.Getenv("PODMAN_VARLINK_BRIDGE"); bridge != "" {
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logrus.Debug("creating a varlink bridge based on env variable")
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remoteEndpoint, err = newBridgeConnection(bridge, nil, r.cmd.LogLevel)
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// if an environment variable for podman_varlink_address is defined,
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// we used that as passed
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} else if address := os.Getenv("PODMAN_VARLINK_ADDRESS"); address != "" {
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logrus.Debug("creating a varlink address based on env variable: %s", address)
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remoteEndpoint, err = newSocketConnection(address)
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// if the user provides a remote host, we use it to configure a bridge connection
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} else if len(r.cmd.RemoteHost) > 0 {
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logrus.Debug("creating a varlink bridge based on user input")
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if len(r.cmd.RemoteUserName) < 1 {
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return nil, errors.New("you must provide a username when providing a remote host name")
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}
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rc := remoteclientconfig.RemoteConnection{r.cmd.RemoteHost, r.cmd.RemoteUserName, false}
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remoteEndpoint, err = newBridgeConnection("", &rc, r.cmd.LogLevel)
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// if the user has a config file with connections in it
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} else if len(remoteConfigConnections.Connections) > 0 {
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logrus.Debug("creating a varlink bridge based configuration file")
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var rc *remoteclientconfig.RemoteConnection
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if len(r.cmd.ConnectionName) > 0 {
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rc, err = remoteConfigConnections.GetRemoteConnection(r.cmd.ConnectionName)
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} else {
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rc, err = remoteConfigConnections.GetDefault()
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}
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if err != nil {
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return nil, err
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}
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remoteEndpoint, err = newBridgeConnection("", rc, r.cmd.LogLevel)
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// last resort is to make a socket connection with the default varlink address for root user
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} else {
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logrus.Debug("creating a varlink address based default root address")
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remoteEndpoint, err = newSocketConnection(DefaultAddress)
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}
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return
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}
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// Connect provides a varlink connection
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func (r RemoteRuntime) Connect() (*varlink.Connection, error) {
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ep, err := r.RemoteEndpoint()
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if err != nil {
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return nil, err
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}
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switch ep.Type {
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case DirectConnection:
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return varlink.NewConnection(ep.Connection)
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case BridgeConnection:
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return varlink.NewBridge(ep.Connection)
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}
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return nil, errors.New(fmt.Sprintf("Unable to determine type of varlink connection: %s", ep.Connection))
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}
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// RefreshConnection is used to replace the current r.Conn after things like
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// using an upgraded varlink connection
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func (r RemoteRuntime) RefreshConnection() error {
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newConn, err := r.Connect()
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if err != nil {
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return err
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}
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r.Conn = newConn
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return nil
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}
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// newSocketConnection returns an endpoint for a uds based connection
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func newSocketConnection(address string) (*Endpoint, error) {
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endpoint := Endpoint{
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Type: DirectConnection,
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Connection: address,
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}
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return &endpoint, nil
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}
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