provision: Add RHEL 7 support.

scripts/lib/setup-yum-repo

@@ -3,9 +3,20 @@ set -x
 set -e
 
 is_centos=false
+is_rhel=false
+is_rhel_registered=false
 if [ -e /etc/centos-release ]; then
     is_centos=true
     yum install -y epel-release
+elif grep -q "Red Hat" /etc/redhat-release; then
+    is_rhel=true
+    yum localinstall -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
+    if subscription-manager status; then
+        # See https://access.redhat.com/discussions/2217891#comment-1032701
+        is_rhel_registered=true
+        # libmemcached-devel can be installed directly if the machine is registered
+        subscription-manager repos --enable "rhel-*-optional-rpms" --enable "rhel-*-extras-rpms"
+    fi
 fi
 yum update -y
 
@@ -22,6 +33,13 @@ if [ "$is_centos" = true ]; then
     # PGroonga
     # https://pgroonga.github.io/install/centos.html
     yum localinstall -y https://packages.groonga.org/centos/groonga-release-latest.noarch.rpm
+elif [ "$is_rhel" = true ]; then
+    if [ "$is_rhel_registered" = false ]; then
+        echo "This machine is unregistered; installing libmemcached-devel from a CentOS mirror ..."
+        yum localinstall -y http://mirror.centos.org/centos/7/os/x86_64/Packages/libmemcached-devel-1.0.16-5.el7.x86_64.rpm
+    fi
+    yum localinstall -y https://download.postgresql.org/pub/repos/yum/10/redhat/rhel-latest-x86_64/pgdg-redhat10-10-2.noarch.rpm
+    yum localinstall -y https://packages.groonga.org/centos/groonga-release-latest.noarch.rpm
 else
     # TODO only fedora29 for now
     dnf install -y "https://download.postgresql.org/pub/repos/yum/$PGVER/fedora/fedora-29-x86_64/pgdg-fedora$PGVER-$PGVER-4.noarch.rpm"

scripts/lib/zulip_tools.py

@@ -329,12 +329,16 @@ def parse_lsb_release():
         with open('/etc/redhat-release', 'r') as fp:
             info = fp.read().strip().split(' ')
         vendor = info[0]
-        if os.path.exists("/etc/centos-release"):
+        if vendor == 'Centos':
             # E.g. "CentOS Linux release 7.5.1804 (Core)"
             codename = vendor.lower() + info[3][0]
-        else:
+        elif vendor == 'Fedora':
             # E.g. "Fedora release 29 (Twenty Nine)"
             codename = vendor.lower() + info[2]
+        elif vendor == 'Red':
+            # E.g. "Red Hat Enterprise Linux Server release 7.6 (Maipo)"
+            vendor = 'RedHat'
+            codename = 'rhel' + info[6][0]  # 7
         distro_info = dict(
             DISTRIB_CODENAME=codename,
             DISTRIB_ID=vendor

tools/lib/provision.py

@@ -43,6 +43,9 @@ SUPPORTED_PLATFORMS = {
     ],
     "Fedora": [
         "fedora29",
+    ],
+    "RedHat": [
+        "rhel7",
     ]
 }
 
@@ -116,7 +119,7 @@ if (not is_rhel_based) and (not os.path.exists("/usr/bin/lsb_release")):
 distro_info = parse_lsb_release()
 vendor = distro_info['DISTRIB_ID']
 codename = distro_info['DISTRIB_CODENAME']
-family = 'redhat' if vendor in ['CentOS', 'Fedora'] else 'debian'
+family = 'redhat' if vendor in ['CentOS', 'Fedora', 'RedHat'] else 'debian'
 if not (vendor in SUPPORTED_PLATFORMS and codename in SUPPORTED_PLATFORMS[vendor]):
     logging.critical("Unsupported platform: {} {}".format(vendor, codename))
     sys.exit(1)
@@ -128,6 +131,7 @@ POSTGRES_VERSION_MAP = {
     "bionic": "10",
     "centos7": "10",
     "fedora29": "10",
+    "rhel7": "10",
 }
 POSTGRES_VERSION = POSTGRES_VERSION_MAP[codename]
 
@@ -175,7 +179,7 @@ if vendor in ["Ubuntu", "Debian"]:
             "postgresql-{0}-pgroonga",
         ]
     ]
-elif vendor == "CentOS":
+elif vendor in ["CentOS", "RedHat"]:
     SYSTEM_DEPENDENCIES = COMMON_YUM_DEPENDENCIES + [
         pkg.format(POSTGRES_VERSION) for pkg in [
             "postgresql{0}-server",
@@ -265,7 +269,26 @@ def install_yum_deps(deps_to_install, retry=False):
     # type: (List[str], bool) -> None
     print(WARNING + "RedHat support is still experimental.")
     run(["sudo", "./scripts/lib/setup-yum-repo"])
-    run(["sudo", "yum", "install", "-y"] + deps_to_install)
+
+    # Hack specific to unregistered RHEL system.  The moreutils
+    # package requires a perl module package, which isn't available in
+    # the unregistered RHEL repositories.
+    #
+    # Error: Package: moreutils-0.49-2.el7.x86_64 (epel)
+    #        Requires: perl(IPC::Run)
+    yum_extra_flags = []  # type: List[str]
+    if vendor == 'RedHat':
+        exitcode, subs_status = subprocess.getstatusoutput("sudo subscription-manager status")
+        if exitcode == 1:
+            # TODO this might overkill since `subscription-manager` is already
+            # called in setup-yum-repo
+            if 'Status' in subs_status:
+                # The output is well-formed
+                yum_extra_flags = ["--skip-broken"]
+            else:
+                print("Unrecognized output. `subscription-manager` might not be available")
+
+    run(["sudo", "yum", "install", "-y"] + yum_extra_flags + deps_to_install)
     postgres_dir = 'pgsql-%s' % (POSTGRES_VERSION,)
     for cmd in ['pg_config', 'pg_isready', 'psql']:
         # Our tooling expects these postgres scripts to be at