From e6db9b2d88ecb6d1ab1878340cdc0135be621239 Mon Sep 17 00:00:00 2001
From: Eric Malloy <em@galt.dev>
Date: Tue, 8 Oct 2019 21:01:16 -0400
Subject: [PATCH 1/3] previous multistage didn't include libraries that weren't
 compiled in. now use alpine image for portability. add entrypoint a, git and
 bash

---
 Dockerfile | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index ccc30ea..9d33570 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,10 @@
-FROM golang:1.9  AS builder
+FROM golang:1.9-alpine
 
 RUN mkdir /app
 ADD . /app/
 WORKDIR /app
+RUN apk add git bash
 RUN go get github.com/go-sql-driver/mysql
 RUN go build -o main .
 
-FROM alpine:3.10
-
-COPY --from=builder /app/main /usr/bin/mysql-load-generator
-CMD ["/usr/bin/mysql-load-generator"]
+CMD ["/app/entrypoint.sh"]

From 0731f05f572447f3a02942a7a7ca778a42258221 Mon Sep 17 00:00:00 2001
From: Eric Malloy <em@galt.dev>
Date: Tue, 8 Oct 2019 21:02:05 -0400
Subject: [PATCH 2/3] add entrypoint , config template and vars with defaulted
 values

---
 config-template.sh | 16 ++++++++++++++++
 entrypoint.sh      |  6 ++++++
 vars.sh            | 15 +++++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100755 config-template.sh
 create mode 100755 entrypoint.sh
 create mode 100644 vars.sh

diff --git a/config-template.sh b/config-template.sh
new file mode 100755
index 0000000..c144c06
--- /dev/null
+++ b/config-template.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+set -x
+
+. vars.sh
+
+cat << EOF > config.json
+{
+    "connectionString": "${USER}:${PASSWORD}@tcp(${HOST}:${PORT})/${DB}",
+    "requestsPerSecond": ${RPS},
+    "printLogs": true,
+    "timeToRunInSeconds": ${TTR},
+    "queries" : [
+	"${QUERY}"
+    ]
+}
+EOF
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100755
index 0000000..d606bdb
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+./config-template.sh
+
+/app/main "$@"
+
diff --git a/vars.sh b/vars.sh
new file mode 100644
index 0000000..9926434
--- /dev/null
+++ b/vars.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# setup for overrides in container environment prefixed by "lg_"
+
+export USER=${lg_USER:-maxscale1}
+export PASSWORD=${lg_PASSWORD:-maxscaledemo}
+export HOST=${lg_HOST:-maxscale.maxscale.svc.cluster.local}
+export PORT=${lg_PORT:-3306}
+export DB=${lg_DB:-employees}
+
+export RPS=${lg_RPS:-2}
+export TTR=${lg_TTR:-90}
+export QUERY=${lg_QUERY:-"select emp.emp_no, emp.first_name, emp.last_name, sal.salary, sal.from_date from employees emp inner join (select emp_no, MAX(salary) as salary, from_date from salaries group by emp_no) sal on (emp.emp_no = sal.emp_no) LIMIT 50;"}
+
+

From 966ea4757d6b40314be89fae00dea986d2b2e644 Mon Sep 17 00:00:00 2001
From: Eric Malloy <malloy.j.eric@gmail.com>
Date: Tue, 8 Oct 2019 18:32:49 -0700
Subject: [PATCH 3/3] add example kubernetes deployment manifest

---
 load-gen.deployment.yaml | 50 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 load-gen.deployment.yaml

diff --git a/load-gen.deployment.yaml b/load-gen.deployment.yaml
new file mode 100644
index 0000000..c0ed1e1
--- /dev/null
+++ b/load-gen.deployment.yaml
@@ -0,0 +1,50 @@
+---
+apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
+kind: Deployment
+metadata:
+  name: loadgen
+  labels:
+    app: loadgen
+spec:
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 0%
+      maxSurge: 66%
+  revisionHistoryLimit: 5
+  replicas: 1
+  selector:
+    matchLabels:
+      app: loadgen
+  template:
+    metadata:
+      labels:
+        app: loadgen
+    spec:
+      containers:
+      - image: lvejm/mysql-load-generator
+        name: loadgen
+        imagePullPolicy: Always
+        resources:
+          limits:
+            cpu: 200m
+            memory: 200Mi
+          requests:
+            cpu: 100m
+            memory: 75Mi
+        env:
+          - name: lg_USER
+            value: maxscale1
+          - name: lg_PASSWORD
+            value: maxscaledemo1
+          - name: lg_HOST
+            value: maxscale.maxscale.svc.cluster.local
+          - name: lg_DB
+            value: employees
+          - name: lg_RPS
+            value: "2"
+          - name: lg_TTR
+            value: "90"
+          - name: lg_QUERY
+            value: "select emp.emp_no, emp.first_name, emp.last_name, sal.salary, sal.from_date from employees emp inner join (select emp_no, MAX(salary) as salary, from_date from salaries group by emp_no) sal on (emp.emp_no = sal.emp_no) LIMIT 50;"
+