Add CI support for Debian 10, Fedora 31 & 33, FreeBSD 11, Ubuntu 20.04

This also adds two environment variables to the Dockerfiles for the
Debian/Ubuntu flavors to avoid stalling on user input when configuring
tzdata.

.cirrus.yml

@@ -73,6 +73,13 @@ env:
 # Linux EOL timelines: https://linuxlifecycle.com/
 # Fedora (~13 months): https://fedoraproject.org/wiki/Fedora_Release_Life_Cycle
 
+fedora33_task:
+  container:
+    # Fedora 33 EOL: Around November 2022
+    dockerfile: ci/fedora-33/Dockerfile
+    << : *RESOURCES_TEMPLATE
+  << : *CI_TEMPLATE
+
 fedora32_task:
   container:
     # Fedora 32 EOL: Around May 2021
@@ -80,10 +87,10 @@ fedora32_task:
     << : *RESOURCES_TEMPLATE
   << : *CI_TEMPLATE
 
-centos7_task:
+fedora31_task:
   container:
-    # CentOS 7 EOL: June 30, 2024
+    # Fedora 31 EOL: Nov 24 2021
-    dockerfile: ci/centos-7/Dockerfile
+    dockerfile: ci/fedora-31/Dockerfile
     << : *RESOURCES_TEMPLATE
   << : *CI_TEMPLATE
 
@@ -99,6 +106,20 @@ centos8_task:
     path: build.tgz
   benchmark_script: ./ci/benchmark.sh
 
+centos7_task:
+  container:
+    # CentOS 7 EOL: June 30, 2024
+    dockerfile: ci/centos-7/Dockerfile
+    << : *RESOURCES_TEMPLATE
+  << : *CI_TEMPLATE
+
+debian10_task:
+  container:
+    # Debian 10 EOL: June 2024
+    dockerfile: ci/debian-10/Dockerfile
+    << : *RESOURCES_TEMPLATE
+  << : *CI_TEMPLATE
+
 debian9_task:
   container:
     # Debian 9 EOL: June 2022
@@ -113,6 +134,13 @@ debian9_32bit_task:
     << : *RESOURCES_TEMPLATE
   << : *CI_TEMPLATE
 
+ubuntu20_task:
+  container:
+    # Ubuntu 20.04 EOL: April 2025
+    dockerfile: ci/ubuntu-20.04/Dockerfile
+    << : *RESOURCES_TEMPLATE
+  << : *CI_TEMPLATE
+
 ubuntu18_task:
   container:
     # Ubuntu 18.04 EOL: April 2023
@@ -144,10 +172,20 @@ macos_task:
     CIRRUS_WORKING_DIR: /tmp/zeek
 
 # FreeBSD EOL timelines: https://www.freebsd.org/security/security.html#sup
-freebsd_task:
+freebsd12_task:
   freebsd_instance:
     # FreeBSD 12 EOL: June 30, 2024
-    image_family: freebsd-12-1
+    image_family: freebsd-12-2
+    cpu: 8
+    # Not allowed to request less than 8GB for an 8 CPU FreeBSD VM.
+    memory: 8GB
+  prepare_script: ./ci/freebsd/prepare.sh
+  << : *CI_TEMPLATE
+
+freebsd11_task:
+  freebsd_instance:
+    # FreeBSD 11 EOL: September 30, 2021
+    image_family: freebsd-11-4
     cpu: 8
     # Not allowed to request less than 8GB for an 8 CPU FreeBSD VM.
     memory: 8GB

ci/debian-10/Dockerfile

@@ -0,0 +1,42 @@
+FROM debian:10
+
+ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
+
+RUN apt-get update && apt-get -y install \
+    git \
+    cmake \
+    make \
+    gcc \
+    g++ \
+    flex \
+    bison \
+    libpcap-dev \
+    libssl-dev \
+    python3 \
+    python3-dev \
+    python3-pip\
+    swig \
+    zlib1g-dev \
+    libkrb5-dev \
+    bsdmainutils \
+    sqlite3 \
+    curl \
+    wget \
+    xz-utils \
+    clang \
+    libc++-7-dev \
+    libc++abi-7-dev \
+  && rm -rf /var/lib/apt/lists/*
+
+RUN update-alternatives --install /usr/bin/cc cc /usr/bin/clang 100
+RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++ 100
+
+# Many distros adhere to PEP 394's recommendation for `python` = `python2` so
+# this is a simple workaround until we drop Python 2 support and explicitly
+# use `python3` for all invocations (e.g. in shebangs).
+RUN ln -sf /usr/bin/python3 /usr/local/bin/python
+RUN ln -sf /usr/bin/pip3 /usr/local/bin/pip
+
+RUN pip install junit2html
+
+ENV CXXFLAGS=-stdlib=libc++

ci/debian-9-32bit/Dockerfile

@@ -1,5 +1,7 @@
 FROM i386/debian:9
 
+ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
+
 RUN apt-get update && apt-get -y install \
     git \
     cmake \

ci/debian-9/Dockerfile

@@ -1,5 +1,7 @@
 FROM debian:9
 
+ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
+
 RUN apt-get update && apt-get -y install \
     git \
     cmake \

ci/fedora-31/Dockerfile

@@ -0,0 +1,31 @@
+FROM fedora:31
+
+RUN yum -y install \
+    bison \
+    cmake \
+    diffutils \
+    findutils \
+    flex \
+    git \
+    gcc \
+    gcc-c++ \
+    libpcap-devel \
+    make \
+    openssl \
+    openssl-devel \
+    python3 \
+    python3-devel \
+    python3-pip\
+    sqlite \
+    swig \
+    which \
+    zlib-devel \
+  && yum clean all && rm -rf /var/cache/yum
+
+# Many distros adhere to PEP 394's recommendation for `python` = `python2` so
+# this is a simple workaround until we drop Python 2 support and explicitly
+# use `python3` for all invocations (e.g. in shebangs).
+RUN ln -sf /usr/bin/python3 /usr/local/bin/python
+RUN ln -sf /usr/bin/pip3 /usr/local/bin/pip
+
+RUN pip install junit2html

ci/fedora-33/Dockerfile

@@ -0,0 +1,31 @@
+FROM fedora:33
+
+RUN yum -y install \
+    bison \
+    cmake \
+    diffutils \
+    findutils \
+    flex \
+    git \
+    gcc \
+    gcc-c++ \
+    libpcap-devel \
+    make \
+    openssl \
+    openssl-devel \
+    python3 \
+    python3-devel \
+    python3-pip\
+    sqlite \
+    swig \
+    which \
+    zlib-devel \
+  && yum clean all && rm -rf /var/cache/yum
+
+# Many distros adhere to PEP 394's recommendation for `python` = `python2` so
+# this is a simple workaround until we drop Python 2 support and explicitly
+# use `python3` for all invocations (e.g. in shebangs).
+RUN ln -sf /usr/bin/python3 /usr/local/bin/python
+RUN ln -sf /usr/bin/pip3 /usr/local/bin/pip
+
+RUN pip install junit2html

ci/ubuntu-16.04/Dockerfile

@@ -1,5 +1,7 @@
 FROM ubuntu:16.04
 
+ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
+
 RUN apt-get update && apt-get -y install \
     git \
     cmake \

ci/ubuntu-18.04/Dockerfile

@@ -1,5 +1,7 @@
 FROM ubuntu:18.04
 
+ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
+
 RUN apt-get update && apt-get -y install \
     git \
     cmake \

ci/ubuntu-20.04/Dockerfile

@@ -0,0 +1,39 @@
+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
+
+RUN apt-get update && apt-get -y install \
+    git \
+    cmake \
+    make \
+    gcc \
+    g++ \
+    flex \
+    bison \
+    libpcap-dev \
+    libssl-dev \
+    python3 \
+    python3-dev \
+    python3-pip\
+    swig \
+    zlib1g-dev \
+    libmaxminddb-dev \
+    libkrb5-dev \
+    bsdmainutils \
+    sqlite3 \
+    curl \
+    wget \
+    unzip \
+    ruby \
+    bc \
+    lcov \
+  && rm -rf /var/lib/apt/lists/*
+
+# Many distros adhere to PEP 394's recommendation for `python` = `python2` so
+# this is a simple workaround until we drop Python 2 support and explicitly
+# use `python3` for all invocations (e.g. in shebangs).
+RUN ln -sf /usr/bin/python3 /usr/local/bin/python
+RUN ln -sf /usr/bin/pip3 /usr/local/bin/pip
+
+RUN pip install junit2html
+RUN gem install coveralls-lcov