From 566e7bb85418a49e8e49796100dff561ec1b4b63 Mon Sep 17 00:00:00 2001
From: iwilltry42 <iwilltry42@gmail.com>
Date: Tue, 8 Oct 2019 22:11:15 +0200
Subject: [PATCH] start translation k3d -> docker

---
 commands.md                      | 23 -------------
 go.sum                           |  1 +
 pkg/runtimes/docker/translate.go | 44 ++++++++++++++++++++++++
 thoughts.md                      | 59 ++++++++++++++++++++++++++++++++
 4 files changed, 104 insertions(+), 23 deletions(-)
 delete mode 100644 commands.md
 create mode 100644 pkg/runtimes/docker/translate.go
 create mode 100644 thoughts.md

diff --git a/commands.md b/commands.md
deleted file mode 100644
index 08f0df2b..00000000
--- a/commands.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# commands
-
-## create
-
-```
-k3d
-  |- create
-  |       |- cluster [NAME ] [flags]
-  |       |- node [NAME ] [flags]
-  |
-  |- delete
-  |       |- cluster [NAME ] [flags]
-  |       |- node [NAME ] [flags]
-  |- get
-  |    |- cluster
-  |    |- node
-  |- start
-  |      |- cluster
-  |      |- node
-  |- stop
-  |     |- cluster
-  |     |- node
-```
\ No newline at end of file
diff --git a/go.sum b/go.sum
index b558d5ef..796bc1e9 100644
--- a/go.sum
+++ b/go.sum
@@ -50,6 +50,7 @@ github.com/docker/distribution v0.0.0-20190905152932-14b96e55d84c h1:6L6qod4JzOm
 github.com/docker/distribution v0.0.0-20190905152932-14b96e55d84c/go.mod h1:0+TTO4EOBfRPhZXAeF1Vu+W3hHZ8eLp8PgKVZlcvtFY=
 github.com/docker/docker v1.4.2-0.20190905191220-3b23f9033967 h1:hqs6DQFz659/085bXwClBRGefVf+kWCTsQR6wwkOMiU=
 github.com/docker/docker v1.4.2-0.20190905191220-3b23f9033967/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v1.13.1 h1:IkZjBSIc8hBjLpqeAbeE5mca5mNgeatLHBy3GO78BWo=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c h1:+pKlWGMw7gf6bQ+oDZB4KHQFypsfjYlq/C4rfL7D3g8=
diff --git a/pkg/runtimes/docker/translate.go b/pkg/runtimes/docker/translate.go
new file mode 100644
index 00000000..1d01bfe4
--- /dev/null
+++ b/pkg/runtimes/docker/translate.go
@@ -0,0 +1,44 @@
+/*
+Copyright © 2019 Thorsten Klein <iwilltry42@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+package docker
+
+import (
+	docker "github.com/docker/docker/api/types/container"
+	"github.com/docker/go-connections/nat"
+	k3d "github.com/rancher/k3d/pkg/types"
+)
+
+func TranslateNodeToContainer(node *k3d.Node) (docker.Config, error) {
+
+	container := docker.Config{}
+	container.Hostname = node.Name
+	container.Image = node.Image
+	//container.Ports = // TODO: translate from what we have to []docker.Port
+	container.Labels = node.Labels
+	container.ExposedPorts = nat.PortSet{}    // TODO:
+	container.Env = []string{}                // TODO:
+	container.Cmd = []string{}                // TODO: dependent on role and extra args
+	container.Volumes = map[string]struct{}{} // TODO:
+
+	return container, nil
+}
diff --git a/thoughts.md b/thoughts.md
new file mode 100644
index 00000000..169d90bb
--- /dev/null
+++ b/thoughts.md
@@ -0,0 +1,59 @@
+# Thoughts
+
+## commands
+
+### `create`
+
+```shell
+k3d
+  |- create
+  |       |- cluster [NAME ] [flags]
+  |       |- node [NAME ] [flags]
+  |
+  |- delete
+  |       |- cluster [NAME ] [flags]
+  |       |- node [NAME ] [flags]
+  |- get
+  |    |- cluster
+  |    |- node
+  |- start
+  |      |- cluster
+  |      |- node
+  |- stop
+  |     |- cluster
+  |     |- node
+```
+
+## Overview
+
+- `cmd/`: everything around the CLI of k3 = human interface, printed output (e.g. list of clusters)
+- `pkg/`: everything else, can be used as a module from other Go projects
+  - `cluster/`: everything around managing cluster components
+  - `runtimes/`: translate k3d types (node, cluster, etc.) to container runtime specific types and manage them
+  - `types/`: collection of types (structs) and constants used by k3d
+  - `util/`: utilities, that could be used for everything, not directly related to the project
+
+## k3d <-> runtime
+
+k3d _should_ work with more than one runtime, if we can implement the Runtime interface for it.
+Here's how k3d types should translate to a runtime type:
+
+- `cluster` = set of _containers_ running in the same _network_, maybe mounting the same _volume(s)_
+- `node` = _container_ with _exposed ports_ and _volume mounts_
+
+### docker
+
+#### node -> container
+
+`container = "github.com/docker/docker/api/types/container"`
+`network = "github.com/docker/docker/api/types/network"`
+
+- Name    -> container.Hostname = node.Name
+- Role    -> container.Labels["role"] = node.Role
+- Image   -> container.Image = node.Image
+- Volumes -> container.HostConfig.PortBindings
+- Env     -> 
+- Args    -> 
+- Ports   -> 
+- Restart -> 
+- Labels  -> container.Labels
\ No newline at end of file