Add dev container

.devcontainer/Dockerfile

@@ -0,0 +1,11 @@
+FROM registry.access.redhat.com/ubi7
+
+RUN yum install go-toolset-1.19 git make curl gzip tar --enablerepo=rhel-7-server-devtools-rpms -y
+
+COPY ./entrypoint.sh /usr/bin/
+RUN chmod +x /usr/bin/entrypoint.sh
+
+COPY ./enable_go_scl.sh /etc/profile.d/
+RUN chmod +x /etc/profile.d/enable_go_scl.sh
+
+ENTRYPOINT ["entrypoint.sh"]

.devcontainer/devcontainer.json

@@ -0,0 +1,41 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/go
+{
+	"name": "Go",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	// "image": "mcr.microsoft.com/devcontainers/go:1.19",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	"features": {
+    // "ghcr.io/devcontainers/features/common-utils:2": {}
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "go version",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+
+	"remoteUser": "root",
+	"remoteEnv": {
+		"HOME": "/home"
+	},
+	"containerUser": "root",
+	"containerEnv": {
+		"HOME": "/home",
+		"WORKDIR": "/workspaces/${localWorkspaceFolderBasename}"
+	},
+	"workspaceMount": "",
+	"runArgs": [
+		"--volume=${localWorkspaceFolder}:/workspaces/${localWorkspaceFolderBasename}:Z"
+	]
+}

.devcontainer/enable_go_scl.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+source scl_source enable go-toolset-1.19

.devcontainer/entrypoint.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+SCLS=go-toolset-1.19
+
+if [ -x "$(command -v scl_source)" ]; then
+  source scl_source enable $SCLS
+fi
+
+cd $WORKDIR
+exec "$@"

.gitignore

@@ -3,3 +3,7 @@ coverage.*
 
 # Binary
 host-metering
+
+#dev
+mocks/subscription-manager-*
+mocks/consumer/

.vscode/launch.json

@@ -0,0 +1,21 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Run once [mocked]",
+      "type": "go",
+      "request": "launch",
+      "mode": "auto",
+      "program": "${workspaceFolder}/main.go",
+      "args": ["once"],
+      "env": {
+        "HOST_METERING_HOST_CERT_PATH": "${workspaceFolder}/mocks/consumer/cert.pem",
+        "HOST_METERING_HOST_CERT_KEY_PATH": "${workspaceFolder}/mocks/consumer/key.pem",
+        "PATH": "${workspaceFolder}/mocks:${env:PATH}"
+      }
+    }
+  ]
+}

README.md

@@ -1,3 +1,15 @@
 # Host Metering
 
 Host metering client.
+
+## Running in a container
+This project has configuration for running inside VSCode container.
+
+You have to have a system with `subscription-manager` installed and registered correctly to use the UBI image (which is the base for this Dockerfile) and to have access to the relevan Red Hat repositories.
+
+## Mocking subscription-manager commands
+`mocked_run.sh` is a wrapper of `go run main.go` to execute the command in mocked context.
+
+### Preparing the mocks
+Inside the `mocks` folder run `./prepare_mock.sh` to generate outputs that will be used as mocks.
+You have to have a system with `subscription-manager` installed and registered correctly to generate the mocks.

mocks/mocked_run.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+pushd $(dirname "$0")
+#prepend path with the mocks folder
+MOCKS_PATH=$(pwd)
+PATH=$MOCKS_PATH:$PATH
+popd
+
+pushd $(dirname "$0")/..
+HOST_METERING_HOST_CERT_PATH=$MOCKS_PATH/consumer/cert.pem HOST_METERING_HOST_CERT_KEY_PATH=$MOCKS_PATH/consumer/key.pem go run main.go $@
+popd

mocks/prepare_mock.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+ACTUAL_USER=$(id -u)
+ACTUAL_GROUP=$(id -g)
+
+echo running subscription-manager identity
+sudo subscription-manager identity > subscription-manager-identity
+echo running subscription-manager usage
+sudo subscription-manager usage > subscription-manager-usage
+echo running subscription-manager service-level
+sudo subscription-manager service-level > subscription-manager-service-level
+echo running subscription-manager facts
+sudo subscription-manager facts > subscription-manager-facts
+
+echo preparing /etc/pki/consumer
+sudo cp -r /etc/pki/consumer ./
+sudo chown $ACTUAL_USER:$ACTUAL_GROUP -R ./consumer

mocks/subscription-manager

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo "#######Mocked output#######"
+cat $(dirname "$0")/subscription-manager-$@