Have a go at converting the Fedora jobs

.circleci/Dockerfile.fedora-28

@@ -0,0 +1,25 @@
+FROM fedora:28
+
+ENV WHEELHOUSE_PATH /tmp/wheelhouse
+ENV VIRTUALENV_PATH /tmp/venv
+# This will get updated by the CircleCI checkout step.
+ENV BUILD_SRC_ROOT /tmp/project
+
+# XXX net-tools is actually a Tahoe-LAFS runtime dependency!
+RUN yum install --assumeyes \
+    git \
+    sudo \
+    make automake gcc gcc-c++ \
+    python \
+    python-devel \
+    libffi-devel \
+    openssl-devel \
+    libyaml-devel \
+    /usr/bin/virtualenv \
+    net-tools
+
+# Get the project source.  Copying in the whole project source here isn't very
+# cache friendly but there's no Docker layer cache on CircleCI anyway!
+COPY . ${BUILD_SRC_ROOT}
+
+RUN "${BUILD_SRC_ROOT}"/.circleci/prepare-image.sh "${WHEELHOUSE_PATH}" "${VIRTUALENV_PATH}" "${BUILD_SRC_ROOT}"

.circleci/Dockerfile.fedora-29

@@ -0,0 +1,25 @@
+FROM fedora:29
+
+ENV WHEELHOUSE_PATH /tmp/wheelhouse
+ENV VIRTUALENV_PATH /tmp/venv
+# This will get updated by the CircleCI checkout step.
+ENV BUILD_SRC_ROOT /tmp/project
+
+# XXX net-tools is actually a Tahoe-LAFS runtime dependency!
+RUN yum install --assumeyes \
+    git \
+    sudo \
+    make automake gcc gcc-c++ \
+    python \
+    python-devel \
+    libffi-devel \
+    openssl-devel \
+    libyaml-devel \
+    /usr/bin/virtualenv \
+    net-tools
+
+# Get the project source.  Copying in the whole project source here isn't very
+# cache friendly but there's no Docker layer cache on CircleCI anyway!
+COPY . ${BUILD_SRC_ROOT}
+
+RUN "${BUILD_SRC_ROOT}"/.circleci/prepare-image.sh "${WHEELHOUSE_PATH}" "${VIRTUALENV_PATH}" "${BUILD_SRC_ROOT}"

.circleci/config.yml

@@ -222,13 +222,15 @@ jobs:
   fedora-28:
     <<: *RHEL_DERIV
     docker:
-      - image: "fedora:28"
+      - image: "tahoelafsci/fedora:28"
+        user: "nobody"
 
 
   fedora-29:
     <<: *RHEL_DERIV
     docker:
-      - image: "fedora:29"
+      - image: "tahoelafsci/fedora:29"
+        user: "nobody"
 
 
   slackware-14.2:
@@ -395,6 +397,18 @@ jobs:
             # You have to create the ubuntu repository (presumably via the
             # Dockerhub web interface) before anything can be pushed to it.
             docker push tahoelafsci/centos:7
+      - run:
+          name: "Build Fedora images"
+          command: |
+            docker build -t tahoelafsci/fedora:28 -f ~/project/.circleci/Dockerfile.fedora-28 ~/project/
+            docker build -t tahoelafsci/fedora:29 -f ~/project/.circleci/Dockerfile.fedora-29 ~/project/
+      - run:
+          name: "Push Fedora images"
+          command: |
+            # You have to create the ubuntu repository (presumably via the
+            # Dockerhub web interface) before anything can be pushed to it.
+            docker push tahoelafsci/fedora:28
+            docker push tahoelafsci/fedora:29
       - run:
           name: "Build Tor-enabled image"
           command: |