installer: support running as a system container

Example:
atomic install --system --set INVENTORY_FILE=$(pwd)/hosts.inventory \
       --set SSH_ROOT=/root/.ssh \
       --set PLAYBOOK_FILE=./playbooks/byo/config.yml openshift-ansible

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Dockerfile

@@ -39,4 +39,7 @@ ADD . /tmp/src
 # as per the INSTALL_OC environment setting above
 RUN /usr/libexec/s2i/assemble
 
+# Add files for running as a system container
+COPY system-container/root /
+
 CMD [ "/usr/libexec/s2i/run" ]

Dockerfile.rhel7

@@ -39,4 +39,7 @@ ENV PLAYBOOK_FILE=playbooks/byo/openshift_facts.yml \
     WORK_DIR=/usr/share/ansible/openshift-ansible \
     OPTS="-v"
 
+# Add files for running as a system container
+COPY system-container/root /
+
 CMD [ "/usr/libexec/s2i/run" ]

system-container/root/exports/config.json.template

@@ -0,0 +1,213 @@
+{
+    "ociVersion": "1.0.0",
+    "platform": {
+        "os": "linux",
+        "arch": "amd64"
+    },
+    "process": {
+        "terminal": false,
+        "consoleSize": {
+            "height": 0,
+            "width": 0
+        },
+        "user": {
+            "uid": 0,
+            "gid": 0
+        },
+        "args": [
+            "/usr/local/bin/run-system-container.sh"
+        ],
+        "env": [
+            "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+            "TERM=xterm",
+            "OPTS=$OPTS",
+            "PLAYBOOK_FILE=$PLAYBOOK_FILE"
+        ],
+        "cwd": "/opt/app-root/src/",
+        "rlimits": [
+            {
+                "type": "RLIMIT_NOFILE",
+                "hard": 1024,
+                "soft": 1024
+            }
+        ],
+        "noNewPrivileges": true
+    },
+    "root": {
+        "path": "rootfs",
+        "readonly": true
+    },
+    "mounts": [
+        {
+            "destination": "/proc",
+            "type": "proc",
+            "source": "proc"
+        },
+        {
+            "destination": "/dev",
+            "type": "tmpfs",
+            "source": "tmpfs",
+            "options": [
+                "nosuid",
+                "strictatime",
+                "mode=755",
+                "size=65536k"
+            ]
+        },
+        {
+            "destination": "/dev/pts",
+            "type": "devpts",
+            "source": "devpts",
+            "options": [
+                "nosuid",
+                "noexec",
+                "newinstance",
+                "ptmxmode=0666",
+                "mode=0620",
+                "gid=5"
+            ]
+        },
+        {
+            "destination": "/dev/shm",
+            "type": "tmpfs",
+            "source": "shm",
+            "options": [
+                "nosuid",
+                "noexec",
+                "nodev",
+                "mode=1777",
+                "size=65536k"
+            ]
+        },
+        {
+            "destination": "/dev/mqueue",
+            "type": "mqueue",
+            "source": "mqueue",
+            "options": [
+                "nosuid",
+                "noexec",
+                "nodev"
+            ]
+        },
+        {
+            "destination": "/sys",
+            "type": "sysfs",
+            "source": "sysfs",
+            "options": [
+                "nosuid",
+                "noexec",
+                "nodev",
+                "ro"
+            ]
+        },
+        {
+            "type": "bind",
+            "source": "$SSH_ROOT",
+            "destination": "/opt/app-root/src/.ssh",
+            "options": [
+                "bind",
+                "rw",
+                "mode=755"
+            ]
+        },
+        {
+            "type": "bind",
+            "source": "$SSH_ROOT",
+            "destination": "/root/.ssh",
+            "options": [
+                "bind",
+                "rw",
+                "mode=755"
+            ]
+        },
+        {
+            "type": "bind",
+            "source": "$VAR_LIB_OPENSHIFT_INSTALLER",
+            "destination": "/var/lib/openshift-installer",
+            "options": [
+                "bind",
+                "rw",
+                "mode=755"
+            ]
+        },
+        {
+            "destination": "/root/.ansible",
+            "type": "tmpfs",
+            "source": "tmpfs",
+            "options": [
+                "nosuid",
+                "strictatime",
+                "mode=755"
+            ]
+        },
+        {
+            "destination": "/tmp",
+            "type": "tmpfs",
+            "source": "tmpfs",
+            "options": [
+                "nosuid",
+                "strictatime",
+                "mode=755"
+            ]
+        },
+        {
+            "type": "bind",
+            "source": "$INVENTORY_FILE",
+            "destination": "/etc/ansible/hosts",
+            "options": [
+                "bind",
+                "rw",
+                "mode=755"
+            ]
+        },
+        {
+            "destination": "/sys/fs/cgroup",
+            "type": "cgroup",
+            "source": "cgroup",
+            "options": [
+                "nosuid",
+                "noexec",
+                "nodev",
+                "relatime",
+                "ro"
+            ]
+        }
+    ],
+    "hooks": {
+
+    },
+    "linux": {
+        "resources": {
+            "devices": [
+                {
+                    "allow": false,
+                    "access": "rwm"
+                }
+            ]
+        },
+        "namespaces": [
+            {
+                "type": "pid"
+            },
+            {
+                "type": "mount"
+            }
+        ],
+        "maskedPaths": [
+            "/proc/kcore",
+            "/proc/latency_stats",
+            "/proc/timer_list",
+            "/proc/timer_stats",
+            "/proc/sched_debug",
+            "/sys/firmware"
+        ],
+        "readonlyPaths": [
+            "/proc/asound",
+            "/proc/bus",
+            "/proc/fs",
+            "/proc/irq",
+            "/proc/sys",
+            "/proc/sysrq-trigger"
+        ]
+    }
+}

system-container/root/exports/manifest.json

@@ -0,0 +1,10 @@
+{
+    "version": "1.0",
+    "defaultValues": {
+        "OPTS": "",
+        "VAR_LIB_OPENSHIFT_INSTALLER" : "/var/lib/openshift-installer",
+        "PLAYBOOK_FILE": "/usr/share/ansible/openshift-ansible/playbooks/byo/config.yml",
+        "SSH_ROOT": "/root/.ssh",
+        "INVENTORY_FILE": "/dev/null"
+    }
+}

system-container/root/exports/service.template

@@ -0,0 +1,6 @@
+[Service]
+ExecStart=$EXEC_START
+ExecStop=-$EXEC_STOP
+Restart=no
+WorkingDirectory=$DESTDIR
+Type=oneshot

system-container/root/exports/tmpfiles.template

@@ -0,0 +1 @@
+d    $VAR_LIB_OPENSHIFT_INSTALLER - - - - -

system-container/root/usr/local/bin/run-system-container.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ansible-playbook -i /etc/ansible/hosts ${OPTS} ${PLAYBOOK_FILE}