migrations: add add-static-pods migration

Adds a new migration for new k8s static-pods settings

Release.toml

@@ -20,5 +20,5 @@ version = "1.0.5"
     "migrate_v1.0.5_add-proxy-restart.lz4",
     "migrate_v1.0.5_add-proxy-services.lz4"
 ]
-"(1.0.5, 1.0.6)" = ["migrate_v1.0.6_metricdog-init.lz4"]
+"(1.0.5, 1.0.6)" = ["migrate_v1.0.6_metricdog-init.lz4", "migrate_v1.0.6_add-static-pods.lz4"]
 

sources/Cargo.toml

@@ -39,6 +39,7 @@ members = [
     "api/migration/migrations/v1.0.5/add-proxy-restart",
     "api/migration/migrations/v1.0.5/add-proxy-services",
     "api/migration/migrations/v1.0.6/metricdog-init",
+    "api/migration/migrations/v1.0.6/add-static-pods",
 
     "bottlerocket-release",
 

sources/api/migration/migrations/v1.0.6/add-static-pods/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "add-static-pods"
+version = "0.1.0"
+authors = ["Erikson Tung <etung@amazon.com>"]
+license = "Apache-2.0 OR MIT"
+edition = "2018"
+publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
+
+[dependencies]
+migration-helpers = { path = "../../../migration-helpers" }

sources/api/migration/migrations/v1.0.6/add-static-pods/src/main.rs

@@ -0,0 +1,24 @@
+#![deny(rust_2018_idioms)]
+
+use migration_helpers::common_migrations::AddPrefixesMigration;
+use migration_helpers::{migrate, Result};
+use std::process;
+
+/// We added new settings for defining k8s static pods.
+/// Remove `settings.kubernetes.static-pods`, `services.static-pods` prefixes when we downgrade.
+fn run() -> Result<()> {
+    migrate(AddPrefixesMigration(vec![
+        "settings.kubernetes.static-pods",
+        "services.static-pods",
+    ]))
+}
+
+// Returning a Result from main makes it print a Debug representation of the error, but with Snafu
+// we have nice Display representations of the error, so we wrap "main" (run) and print any error.
+// https://github.com/shepmaster/snafu/issues/110
+fn main() {
+    if let Err(e) = run() {
+        eprintln!("{}", e);
+        process::exit(1);
+    }
+}