docs(*): added info about arm and installer detect arch (kumahq#829)

Signed-off-by: Łukasz Dziedziak <[email protected]>

docs/.vuepress/public/installer.sh

@@ -21,7 +21,7 @@
 DIR="$( cd "$( dirname "$0" )" >/dev/null 2>&1 && pwd )"
 
 : "${VERSION:=}"
-: "${ARCH:=amd64}"
+: "${ARCH:=}"
 
 PRODUCT_NAME=Kuma
 LATEST_VERSION=https://kuma.io/latest_version
@@ -67,6 +67,18 @@ if [ -z "$DISTRO" ]; then
   exit 1
 fi
 
+DETECTED_ARCH=`uname -m`
+if [ "$ARCH" = "" ]; then
+  if [ "$DETECTED_ARCH" = "x86_64" ]; then
+    ARCH=amd64
+  elif [ "$DETECTED_ARCH" = "arm64" ] || [ "$DETECTED_ARCH" = "aarch64" ] || [ "$DETECTED_ARCH" = "armv8l" ] || [ "$DETECTED_ARCH" = "armv8b" ]; then
+    ARCH=arm64
+  else
+    printf "ERROR\tArchitecture %s not supported by $PRODUCT_NAME\n" "$DETECTED_ARCH"
+    exit 1
+  fi
+fi
+
 if [ -z "$VERSION" ]; then
   # Fetching latest version
   printf "INFO\tFetching latest $PRODUCT_NAME version..\n"

docs/docs/dev/documentation/requirements.md

@@ -2,6 +2,10 @@
 
 This page expose the different requirements to run Kuma.
 
+## Architecture
+
+Kuma supports machines with `x86_64` architecture and since `1.7.0` it's possible to run Kuma on `arm64`.
+
 ## Kubernetes
 
 Kuma is validated against Kubernetes `1.19.x`, `1.20.x`, `1.21.x` and `1.22.x`.