Merge pull request #5 from nmnellis/install-script

Install script and runAsUser

README.md

@@ -4,6 +4,16 @@ generate kubernetes yaml for applications
 
 ![Kiali UI](./docs/kiali-ui.png)
 
+## To Install
+
+```shell
+# latest version
+curl -sL https://raw.githubusercontent.com/nmnellis/istio-app-simulator/main/install.sh | sh -
+# specific version
+curl -sL https://raw.githubusercontent.com/nmnellis/istio-app-simulator/main/install.sh | APP_VERSION=${APP_VERSION} sh -
+```
+
+
 ### Synopsis
 
 This application generates kubernetes yaml that sets up complex application networks for a given amount of namespaces. 
@@ -46,7 +56,7 @@ generate [flags]
 
 * Overriding default values
 ```shell
-./istio-app-simulator generate \
+ias generate \
   # only generate 3 namespaces
   # namespaces are named ns-1, ns-2, ns-3
   --namespaces 3 \ 
@@ -60,7 +70,7 @@ generate [flags]
 
 * Manipulating chances
 ```shell
-./istio-app-simulator generate \
+ias generate \
   # every application will call some external service
   --chance-call-external 100 \ 
   # half of all applications will call an application in another namespace
@@ -83,14 +93,14 @@ generate [flags]
 #     istio-injection: enabled
 #     seed: "1625582727962871000"
 
-./istio-app-simulator generate \
+ias generate \
   # use the seed above to regenerate the same output
   --seed 1625582727962871000
 ```
 
 * Tuning Apps and sidecars
 ```shell
-./istio-app-simulator generate \
+ias generate \
     -o out/cluster-1 \
     # always generate the same yaml for seed 100
     --seed 100 \

install.sh

@@ -0,0 +1,80 @@
+#!/bin/sh
+
+set -eu
+
+if [ -x "$(command -v python3)" ]; then
+  alias any_python='python3'
+elif [ -x "$(command -v python)" ]; then
+  alias any_python='python'
+elif [ -x "$(command -v python2)" ]; then
+  alias any_python='python2'
+else
+  echo Python 2 or 3 is required to install ias
+  exit 1
+fi
+
+if [ -z "${APP_VERSION:-}" ]; then
+  APP_VERSIONS=$(curl -sH"Accept: application/vnd.github.v3+json" https://api.github.com/repos/nmnellis/istio-app-simulator/releases | any_python -c "import sys; from distutils.version import StrictVersion, LooseVersion; from json import loads as l; releases = l(sys.stdin.read()); releases = [release['tag_name'] for release in releases];  filtered_releases = list(filter(lambda release_string: len(release_string) > 0 and StrictVersion.version_re.match(release_string[1:]) != None, releases)); filtered_releases.sort(key=LooseVersion, reverse=True); print('\n'.join(filtered_releases))")
+else
+  APP_VERSIONS="${APP_VERSION}"
+fi
+
+if [ "$(uname -s)" = "Darwin" ]; then
+  OS=darwin
+else
+  OS=linux
+fi
+
+for app_version in $APP_VERSIONS; do
+
+tmp=$(mktemp -d /tmp/ias.XXXXXX)
+filename="istio_app_simulator_${OS}_amd64"
+url="https://github.com/nmnellis/istio-app-simulator/releases/download/${app_version}/${filename}.zip"
+
+if curl -f ${url} >/dev/null 2>&1; then
+  echo "Attempting to download istio app simulator version ${app_version}"
+else
+  continue
+fi
+
+(
+  cd "$tmp"
+
+  echo "Downloading ${filename}..."
+
+  SHA=$(curl -sL "${url}.sha256" | cut -d' ' -f1)
+  curl -sLO "${url}"
+  echo "Download complete!"
+#  checksum=$(openssl dgst -sha256 "${filename}" | awk '{ print $2 }')
+#  if [ "$checksum" != "$SHA" ]; then
+#    echo "Checksum validation failed." >&2
+#    exit 1
+#  fi
+#  echo "Checksum valid."
+
+)
+
+(
+
+  cd "$HOME"
+  mkdir -p ".istio/bin"
+  echo "extracting zip ${tmp}/${filename}"
+  unzip "${tmp}/${filename}.zip" -d ${tmp}
+  mv "${tmp}/istio-app-simulator" ".istio/bin/ias"
+  chmod +x ".istio/bin/ias"
+)
+
+rm -r "$tmp"
+
+echo "istio app simulator was successfully installed 🎉"
+echo ""
+echo "Add the ias CLI to your path with:"
+echo "  export PATH=\$HOME/.istio/bin:\$PATH"
+echo ""
+echo "Now run:"
+echo "  ias generate     # generate applications"
+exit 0
+done
+
+echo "No versions of ias found."
+exit 1

pkg/generate/assets/app.yaml.tmpl

@@ -87,6 +87,8 @@ spec:
         image: ghcr.io/nmnellis/fake-service:v2
         ports:
         - containerPort: 8080
+        securityContext:
+          runAsUser: 1001
         env:
         - name: "LISTEN_ADDR"
           value: "0.0.0.0:8080"