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diff --git a/krebs/5pkgs/test/infest-cac-centos7/notes b/krebs/5pkgs/test/infest-cac-centos7/notes
new file mode 100755
index 000000000..5bb5de2c4
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+++ b/krebs/5pkgs/test/infest-cac-centos7/notes
@@ -0,0 +1,116 @@
+#! /bin/sh
+
+# nix-shell -p gnumake jq openssh cac cacpanel
+set -eufx
+
+# 2 secrets are required:
+
+krebs_cred=${krebs_cred-./cac.json}
+retiolum_key=${retiolum_key-./retiolum.rsa_key.priv}
+
+# Sanity
+if test ! -r "$krebs_cred";then
+  echo "\$krebs_cred=$krebs_cred must be readable"; exit 1
+fi
+if test ! -r "$retiolum_key";then
+  echo "\$retiolum_key=$retiolum_key must be readable"; exit 1
+fi
+
+krebs_secrets=$(mktemp -d)
+sec_file=$krebs_secrets/cac_config
+krebs_ssh=$krebs_secrets/tempssh
+export cac_resources_cache=$krebs_secrets/res_cache.json
+export cac_servers_cache=$krebs_secrets/servers_cache.json
+export cac_tasks_cache=$krebs_secrets/tasks_cache.json
+export cac_templates_cache=$krebs_secrets/templates_cache.json
+# we need to receive this key from buildmaster to speed up tinc bootstrap
+TRAP="rm -r $krebs_secrets;trap - INT TERM EXIT"
+trap "$TRAP" INT TERM EXIT
+
+cat > $sec_file <<EOF
+cac_login="$(jq -r .email $krebs_cred)"
+cac_key="$(cac-cli panel --config $krebs_cred settings | jq -r .apicode)"
+EOF
+
+export cac_secrets=$sec_file
+cac-cli panel --config $krebs_cred update-api-ip
+
+# test login:
+cac update
+cac servers
+
+# Template 26: CentOS7
+# TODO: use cac templates to determine the real Centos7 template in case it changes
+name=$( cac build cpu=1 ram=512 storage=10 os=26 2>&1\
+  | jq -r .servername)
+
+id=servername:$name
+trap "cac delete $id;$TRAP;exit" INT TERM EXIT
+# TODO: timeout?
+
+wait_login_cac(){
+  # timeout
+  for t in `seq 180`;do
+    # now we have a working cac server
+    if cac ssh $1 -o ConnectTimeout=10 \
+                  cat /etc/redhat-release | \
+                    grep CentOS ;then
+      return 0
+    fi
+    sleep 10
+  done
+  return 1
+}
+# die on timeout
+wait_login_cac $id
+
+mkdir -p shared/2configs/temp
+cac generatenetworking $id > \
+  shared/2configs/temp/networking.nix
+# new temporary ssh key we will use to log in after infest
+ssh-keygen -f $krebs_ssh -N ""
+cp $retiolum_key $krebs_secrets/retiolum.rsa_key.priv
+# we override the directories for secrets and stockholm
+# additionally we set the ssh key we generated
+ip=$(cac getserver $id | jq -r .ip)
+
+cat > shared/2configs/temp/dirs.nix <<EOF
+_: {
+  krebs.build.source.dir = {
+    secrets.path = "$krebs_secrets";
+    stockholm.path = "$(pwd)";
+  };
+  users.extraUsers.root.openssh.authorizedKeys.keys = [
+    "$(cat ${krebs_ssh}.pub)"
+  ];
+  krebs.build.target = "$ip";
+}
+EOF
+
+LOGNAME=shared make eval get=krebs.infest \
+  target=derp system=test-centos7 filter=json \
+  | sed -e "s#^ssh.*<<#cac ssh $id<<#" \
+        -e "/^rsync/a -e 'cac ssh $id' \\\\"  \
+        -e "s#root.derp:#:#" > $krebs_secrets/infest
+sh -x $krebs_secrets/infest
+
+# TODO: generate secrets directory $krebs_secrets for nix import
+cac powerop $id reset
+
+wait_login(){
+  # timeout
+  for t in `seq 90`;do
+    # now we have a working cac server
+    if ssh -o StrictHostKeyChecking=no \
+           -o UserKnownHostsFile=/dev/null \
+           -i $krebs_ssh \
+           -o ConnectTimeout=10 \
+           -o BatchMode=yes \
+           root@$1 nixos-version ;then
+      return 0
+    fi
+    sleep 10
+  done
+  return 1
+}
+wait_login $ip