containers as functions (#1681)

PR adds a new executortype which supports running containers as functions. New CLI under functions is added to create container as functions.

Co-authored-by: Harsh Thakur <harshthakur9030@gmail.com>
Co-authored-by: Sanket Sudake <sanketsudake@gmail.com>

pkg/fission-cli/flag/flag.go

@@ -96,6 +96,10 @@ var (
 	FnSpecializationTimeout = Flag{Type: Int, Name: flagkey.FnSpecializationTimeout, Aliases: []string{"st"}, Usage: "Timeout for executor to wait for function pod creation", DefaultValue: fv1.DefaultSpecializationTimeOut}
 	FnEnvName               = Flag{Type: String, Name: flagkey.FnEnvironmentName, Usage: "Environment name for function"}
 	FnPkgName               = Flag{Type: String, Name: flagkey.FnPackageName, Aliases: []string{"pkg"}, Usage: "Name of the existing package (--deploy and --src and --env will be ignored), should be in the same namespace as the function"}
+	FnImageName             = Flag{Type: String, Name: flagkey.FnImageName, Usage: "Name of the Docker image to be deployed as a function. Valid only when executorType is set to 'container'"}
+	FnPort                  = Flag{Type: Int, Name: flagkey.FnPort, Usage: "Port where the application is running", DefaultValue: 8888}
+	FnCommand               = Flag{Type: String, Name: flagkey.FnCommand, Usage: "Command to be passed to the container. If not specified , the ones defined in the image are used"}
+	FnArgs                  = Flag{Type: String, Name: flagkey.FnArgs, Usage: "Args to be passed to the command on the container. If not specified , the ones defined in the image are used"}
 	FnEntryPoint            = Flag{Type: String, Name: flagkey.FnEntrypoint, Aliases: []string{"entry"}, Usage: "Entry point for environment v2 to load with"}
 	FnBuildCmd              = Flag{Type: String, Name: flagkey.FnBuildCmd, Usage: "Package build command for builder to run with"}
 	FnSecret                = Flag{Type: StringSlice, Name: flagkey.FnSecret, Usage: "Function access to secret, should be present in the same namespace as the function. You can provide multiple secrets using multiple --secrets flags. In the case of fn update the the secrets will be replaced by the provided list of secrets."}

pkg/fission-cli/flag/key/key.go

@@ -48,6 +48,10 @@ const (
 	FnSpecializationTimeout = "specializationtimeout"
 	FnEnvironmentName       = "env"
 	FnPackageName           = "pkgname"
+	FnImageName             = "image"
+	FnPort                  = "port"
+	FnCommand               = "command"
+	FnArgs                  = "args"
 	FnEntrypoint            = "entrypoint"
 	FnBuildCmd              = "buildcmd"
 	FnSecret                = "secret"