CI: Build .iso (but not -efi.iso) images.

Previously (in #8) building both seemed to timeout or otherwise fall foul of
some sort of infra glitch. Try just building one for now.

This is a first step in trying to actually boot images in CI.

Signed-off-by: Ian Campbell <ijc@docker.com>

.circleci/config.yml

@@ -35,14 +35,22 @@ linuxkit_pkg_build: &linuxkit_pkg_build
 image_build: &image_build
   docker:
     - image: debian:stretch
+  # image builds seem to need a bit more grunt (RAM) than usual. Possibly getting OOM killed, which https://github.com/moby/tool/pull/191 might help.
+  # NB: This will become a paid for feature at some point soon (with plenty of warning), so is not a long term solution.
+  # small 		1.0 	2GB
+  # medium (default) 	2.0 	4GB	pass:	fail:5
+  # medium+ 		3.0 	6GB	pass:	fail:2
+  # large 		4.0 	8GB	pass:2	fail:
+  # xlarge 		8.0 	16GB
+  resource_class: large
   steps:
     - run:
         name: Configure $PATH
         command: echo 'export PATH=/workspace/bin:$PATH' >> $BASH_ENV
     - run:
         name: Install packages
         # ca-certificates are needed for attach_workspace (and git over https)
-        command: apt-get update && apt-get install -y ca-certificates curl git make openssh-client
+        command: apt-get update && apt-get install -y ca-certificates curl git make openssh-client strace
     - attach_workspace:
         at: /workspace
     - checkout
@@ -84,10 +92,12 @@ image_build: &image_build
         command: |
           mkdir -p /workspace/images/kube-$KUBE_RUNTIME-$KUBE_NETWORK
           df -h .
-          # KUBE_FORMATS="iso-efi iso-bios" times out or fails for larger docker images.
-          # Just do tar for now.
-          make KUBE_FORMATS="tar" master node
-          #mv kube-master*.iso kube-node*.iso /workspace/images/kube-$KUBE_RUNTIME-$KUBE_NETWORK
+          ulimit -a
+          make LINUXKIT_ARGS="-v" KUBE_FORMATS="iso-bios" master node
+          mv kube-master*.iso kube-node*.iso /workspace/images/kube-$KUBE_RUNTIME-$KUBE_NETWORK
+    - persist_to_workspace:
+        root: /workspace
+        paths: images
 
 version: 2
 jobs:

Makefile

@@ -15,6 +15,8 @@ KUBE_FORMAT_ARGS := $(patsubst %,-format %,$(KUBE_FORMATS))
 all: master node
 
 master: yml/kube.yml yml/$(KUBE_RUNTIME).yml yml/$(KUBE_RUNTIME)-master.yml yml/$(KUBE_NETWORK).yml
+	# strace logs received signals
+	#strace -f -e trace=signal
 	linuxkit $(LINUXKIT_ARGS) build $(LINUXKIT_BUILD_ARGS) -name kube-master $(KUBE_FORMAT_ARGS) $^
 
 node: yml/kube.yml yml/$(KUBE_RUNTIME).yml yml/$(KUBE_NETWORK).yml

boot.sh

@@ -88,4 +88,4 @@ if [ -n "${kubeadm_data}" ] ; then
     echo "{  \"kubeadm\": { \"entries\": { ${kubeadm_data} } } }" > $state/metadata.json
 fi
 
-linuxkit run ${KUBE_RUN_ARGS} -networking ${KUBE_NETWORKING} -cpus ${KUBE_VCPUS} -mem ${KUBE_MEM} -state "${state}" -disk size=${KUBE_DISK} -data $state/metadata.json ${uefi} "${img}${suffix}"
+exec linuxkit run ${KUBE_RUN_ARGS} -networking ${KUBE_NETWORKING} -cpus ${KUBE_VCPUS} -mem ${KUBE_MEM} -state "${state}" -disk size=${KUBE_DISK} -data $state/metadata.json ${uefi} "${img}${suffix}"

ssh_into_kubelet.sh

@@ -3,7 +3,8 @@
 sshopts="-o LogLevel=FATAL \
 	 -o StrictHostKeyChecking=no \
 	 -o UserKnownHostsFile=/dev/null \
-	 -o IdentitiesOnly=yes"
+	 -o IdentitiesOnly=yes \
+	 $SSHOPTS"
 
 case $(uname -s) in
     Linux)
@@ -15,4 +16,4 @@ case $(uname -s) in
 	    ijc25/alpine-ssh"
 	;;
 esac
-$ssh $sshopts -t root@"$1" ctr tasks exec --tty --exec-id ssh-$(hostname)-$$ kubelet ash -l
+exec $ssh $sshopts -t root@"$1" ctr tasks exec --tty --exec-id ssh-$(hostname)-$$ kubelet ash -l