ci: build in kubernetes

We can use the same pod definition for both the x86_64 and aarch64
stages, since the `kubernetes` agent block can override the node
selector.

ci/Dockerfile

@@ -1,13 +0,0 @@
-FROM rust:1.59.0-slim
-
-RUN apt-get update && \
-    apt-get install -y \
-        cmake \
-        git \
-        libssl-dev \
-        libx11-dev \
-        libxext-dev \
-        pkg-config \
-        && \
-    apt-get clean && \
-    rm -rf /var/cache/apt /var/lib/apt

ci/Jenkinsfile

@@ -10,9 +10,10 @@ pipeline {
             parallel {
                 stage('Build: x86_64') {
                     agent {
-                        dockerfile {
+                        kubernetes {
-                            label 'x86_64'
+                            yamlFile 'ci/podTemplate.yaml'
-                            dir 'ci'
+                            nodeSelector 'kubernetes.io/arch=amd64'
+                            defaultContainer 'build'
                         }
                     }
                     steps {
@@ -27,9 +28,10 @@ pipeline {
 
                 stage('Build: aarch64') {
                     agent {
-                        dockerfile {
+                        kubernetes {
-                            label 'aarch64'
+                            yamlFile 'ci/podTemplate.yaml'
-                            dir 'ci'
+                            nodeSelector 'kubernetes.io/arch=arm64'
+                            defaultContainer 'build'
                         }
                     }
                     steps {

ci/podTemplate.yaml

@@ -0,0 +1,8 @@
+spec:
+  containers:
+  - name: build
+    image: git.pyrocufflink.net/containerimages/build/mqttdpms
+    command:
+    - cat
+    stdin: true
+    tty: true