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authorbaude <bbaude@redhat.com>2017-11-28 16:25:01 -0600
committerbaude <bbaude@redhat.com>2017-12-11 08:24:30 -0600
commite8a32e3722e0b814c654cdb8809565a21fc120d3 (patch)
tree8b88407b645e9403f4fc7ebf2e4d62bc34785a20 /cmd
parent8d31ec2ad775c97c4b860eb24a3481092b6e88e3 (diff)
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kpod exec
Initial wiring of kpod exec. We wont support the following options for exec: * detach -- unsure of use case * detach-keys -- not supported by runc * interactive -- all terminals will be interactive Not adding exec tests as we need to think about how to support a test that requires console access but our CI tests have no console. Signed-off-by: baude <bbaude@redhat.com>
Diffstat (limited to 'cmd')
-rw-r--r--cmd/kpod/exec.go86
-rw-r--r--cmd/kpod/main.go1
2 files changed, 87 insertions, 0 deletions
diff --git a/cmd/kpod/exec.go b/cmd/kpod/exec.go
new file mode 100644
index 000000000..f76983810
--- /dev/null
+++ b/cmd/kpod/exec.go
@@ -0,0 +1,86 @@
+package main
+
+import (
+ "fmt"
+ "strings"
+
+ "github.com/pkg/errors"
+ "github.com/projectatomic/libpod/libpod"
+ "github.com/urfave/cli"
+)
+
+var (
+ execFlags = []cli.Flag{
+ cli.StringSliceFlag{
+ Name: "env, e",
+ Usage: "Set environment variables",
+ },
+ cli.BoolFlag{
+ Name: "privileged",
+ Usage: "Give the process extended Linux capabilities inside the container. The default is false",
+ },
+ cli.BoolFlag{
+ Name: "tty, t",
+ Usage: "Allocate a pseudo-TTY. The default is false",
+ },
+ cli.StringFlag{
+ Name: "user, u",
+ Usage: "Sets the username or UID used and optionally the groupname or GID for the specified command",
+ },
+ }
+ execDescription = `
+ kpod exec
+
+ Run a command in a running container
+`
+
+ execCommand = cli.Command{
+ Name: "exec",
+ Usage: "Run a process in a running container",
+ Description: execDescription,
+ Flags: execFlags,
+ Action: execCmd,
+ ArgsUsage: "CONTAINER-NAME",
+ }
+)
+
+func execCmd(c *cli.Context) error {
+ var envs []string
+ args := c.Args()
+ if len(args) < 1 {
+ return errors.Errorf("you must provide one container name or id")
+ }
+ if len(args) < 2 {
+ return errors.Errorf("you must provide a command to exec")
+ }
+ cmd := args[1:]
+ runtime, err := getRuntime(c)
+ if err != nil {
+ return errors.Wrapf(err, "error creating libpod runtime")
+ }
+ defer runtime.Shutdown(false)
+
+ ctr, err := runtime.LookupContainer(args[0])
+ if err != nil {
+ return errors.Wrapf(err, "unable to exec into %s", args[0])
+ }
+ // Create a list of keys provided by the user
+ var userEnvKeys []string
+ for _, env := range c.StringSlice("env") {
+ splitEnv := strings.Split(env, "=")
+ userEnvKeys = append(userEnvKeys, splitEnv[0])
+ }
+
+ envs = append(envs, c.StringSlice("env")...)
+
+ // if the default key isnt in the user-provided list, add the default
+ // key and value to the environment variables. this is needed to set
+ // PATH for example.
+ for k, v := range defaultEnvVariables {
+ if !libpod.StringInSlice(k, userEnvKeys) {
+ envs = append(envs, fmt.Sprintf("%s=%s", k, v))
+ }
+ }
+
+ return ctr.Exec(c.Bool("tty"), c.Bool("privileged"), envs, cmd, c.String("user"))
+}
diff --git a/cmd/kpod/main.go b/cmd/kpod/main.go
index 7382644b9..708031dc9 100644
--- a/cmd/kpod/main.go
+++ b/cmd/kpod/main.go
@@ -37,6 +37,7 @@ func main() {
attachCommand,
createCommand,
diffCommand,
+ execCommand,
exportCommand,
historyCommand,
imagesCommand,