Add Sundog to handle dynamic settings

packages/api/api.spec

@@ -9,6 +9,7 @@ License: Apache-2.0 AND (Apache-2.0 OR BSL-1.0) AND (Apache-2.0 OR MIT) AND Apac
 Source0: %{workspace_name}.crate
 Source1: apiserver.service
 Source2: moondog.service
+Source3: sundog.service
 %cargo_bundle_crates -n %{workspace_name} -t 0
 BuildRequires: gcc-%{_cross_target}
 BuildRequires: %{_cross_os}glibc-devel
@@ -29,6 +30,12 @@ Requires: %{_cross_os}apiserver = %{version}-%{release}
 %description -n %{_cross_os}moondog
 %{summary}.
 
+%package -n %{_cross_os}sundog
+Summary: Updates settings dynamically based on user-specified generators
+Requires: %{_cross_os}apiserver = %{version}-%{release}
+%description -n %{_cross_os}sundog
+%{summary}.
+
 %package -n %{_cross_os}thar-be-settings
 Summary: Applies changed settings to a Thar system
 Requires: %{_cross_os}apiserver = %{version}-%{release}
@@ -49,9 +56,11 @@ Requires: %{_cross_os}apiserver = %{version}-%{release}
 mkdir -p %{buildroot}/%{systemd_systemdir}
 install -m 0644 -t %{buildroot}/%{systemd_systemdir} %{SOURCE1}
 install -m 0644 -t %{buildroot}/%{systemd_systemdir} %{SOURCE2}
+install -m 0644 -t %{buildroot}/%{systemd_systemdir} %{SOURCE3}
 
 %cargo_install -p apiserver
 %cargo_install -p moondog
+%cargo_install -p sundog
 %cargo_install -p thar-be-settings
 
 %files -n %{_cross_os}apiserver
@@ -62,6 +71,10 @@ install -m 0644 -t %{buildroot}/%{systemd_systemdir} %{SOURCE2}
 %{_cross_bindir}/moondog
 %{systemd_systemdir}/moondog.service
 
+%files -n %{_cross_os}sundog
+%{_cross_bindir}/sundog
+%{systemd_systemdir}/sundog.service
+
 %files -n %{_cross_os}thar-be-settings
 %{_cross_bindir}/thar-be-settings
 

packages/api/sundog.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Updates settings dynamically based on user-specified generators
+After=network-online.target
+After=apiserver.service
+After=moondog.service
+Requires=network-online.target
+Requires=apiserver.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/sundog
+
+[Install]
+WantedBy=multi-user.target

packages/release/release.spec

@@ -29,6 +29,7 @@ Requires: %{_cross_os}kernel
 Requires: %{_cross_os}moondog
 Requires: %{_cross_os}ripgrep
 Requires: %{_cross_os}signpost
+Requires: %{_cross_os}sundog
 Requires: %{_cross_os}systemd
 Requires: %{_cross_os}thar-be-settings
 Requires: %{_cross_os}util-linux

workspaces/api/Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "apiserver",
     "moondog",
+    "sundog",
     "thar-be-settings",
 ]
 

workspaces/api/sundog/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "sundog"
+version = "0.1.0"
+authors = ["mrowicki <mrowicki@amazon.com>"]
+edition = "2018"
+publish = false
+build = "build.rs"
+
+[dependencies]
+apiserver = { path = "../apiserver" }
+reqwest = { version = "0.9", default-features = false, features = [] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1"
+snafu = "0.4"
+log = "0.4"
+stderrlog = "0.4"
+
+[build-dependencies]
+cargo-readme = "3.1"

workspaces/api/sundog/README.md

@@ -0,0 +1,14 @@
+# sundog
+
+Current version: 0.1.0
+
+## Introduction
+
+sundog is a small program to handle settings that must be generated at OS runtime.
+
+It requests settings generators from the API and runs them.
+The output is collected and sent to a known Thar API server endpoint and committed.
+
+## Colophon
+
+This text was generated using [cargo-readme](https://crates.io/crates/cargo-readme), and includes the rustdoc from `src/main.rs`.

workspaces/api/sundog/README.tpl

@@ -0,0 +1,9 @@
+# {{crate}}
+
+Current version: {{version}}
+
+{{readme}}
+
+## Colophon
+
+This text was generated using [cargo-readme](https://crates.io/crates/cargo-readme), and includes the rustdoc from `src/main.rs`.

workspaces/api/sundog/build.rs

@@ -0,0 +1,25 @@
+// Automatically generate README.md from rustdoc.
+
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    let mut source = File::open("src/main.rs").unwrap();
+    let mut template = File::open("README.tpl").unwrap();
+
+    let content = cargo_readme::generate_readme(
+        &PathBuf::from("."), // root
+        &mut source,         // source
+        Some(&mut template), // template
+        // The "add x" arguments don't apply when using a template.
+        true,  // add title
+        false, // add badges
+        false, // add license
+        true,  // indent headings
+    )
+    .unwrap();
+
+    let mut readme = File::create("README.md").unwrap();
+    readme.write_all(content.as_bytes()).unwrap();
+}