main system users in new servers
This commit is contained in:
jorgepastorr
pedro
parent
39eea70b79
commit
f63134f3fe
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@ -460,3 +460,246 @@ class VsFTPdTraffic(ServiceMonitor):
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'username': user.username,
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}
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return replace(context, "'", '"')
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# -----------------------------------------------------------------------------------------------------------------------------------------
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class UNIXUserControllerNewServers(ServiceController):
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"""
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Basic UNIX system user/group support based on <tt>useradd</tt>, <tt>usermod</tt>, <tt>userdel</tt> and <tt>groupdel</tt>.
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Autodetects and uses ACL if available, for better permission management.
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"""
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verbose_name = _("UNIX user new servers")
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model = 'systemusers.SystemUser'
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actions = ('save', 'delete', 'set_permission', 'validate_paths_exist', 'create_link')
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doc_settings = (settings, (
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'SYSTEMUSERS_DEFAULT_GROUP_MEMBERS',
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'SYSTEMUSERS_MOVE_ON_DELETE_PATH',
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'SYSTEMUSERS_FORBIDDEN_PATHS'
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))
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def save(self, user):
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context = self.get_context(user)
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if not context['user']:
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return
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if not user.active:
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self.append(textwrap.dedent("""
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#Just disable that user, if it exists
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if id %(user)s ; then
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usermod %(user)s --password '%(password)s'
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fi
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""") % context)
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return
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if user.is_main:
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# TODO userd add will fail if %(user)s group already exists
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self.append(textwrap.dedent("""
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# Update/create user state for %(user)s
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if id %(user)s ; then
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usermod %(user)s --home '%(home)s/%(user)s' \\
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--password '%(password)s' \\
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--shell '%(shell)s' \\
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--groups '%(groups)s'
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else
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useradd_code=0
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useradd %(user)s --home '%(home)s/%(user)s' \\
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--password '%(password)s' \\
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--shell '%(shell)s' \\
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--groups '%(groups)s' || useradd_code=$?
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if [[ $useradd_code -eq 8 ]]; then
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# User is logged in, kill and retry
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pkill -u %(user)s; sleep 2
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pkill -9 -u %(user)s; sleep 1
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useradd %(user)s --home '%(home)s/%(user)s' \\
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--password '%(password)s' \\
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--shell '%(shell)s' \\
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--groups '%(groups)s'
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elif [[ $useradd_code -ne 0 ]]; then
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exit $useradd_code
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fi
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fi
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mkdir -p '%(base_home)s/%(user)s'
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chown root:%(user)s %(base_home)s
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chmod 710 '%(base_home)s'
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setfacl -m 'u:%(user)s:rx' %(base_home)s
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chown %(user)s:%(user)s '%(base_home)s/%(user)s'
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chmod 700 '%(base_home)s/%(user)s'
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""") % context
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)
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self.append(textwrap.dedent("""\
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ls -A /etc/skel/ | while read line; do
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if [[ ! -e "%(home)s/${line}" ]]; then
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cp -a "/etc/skel/${line}" "%(base_home)s/%(user)s/${line}" && \\
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chown -R %(user)s:%(user)s "%(base_home)s/%(user)s/${line}"
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fi
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done
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""") % context
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)
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for member in settings.SYSTEMUSERS_DEFAULT_GROUP_MEMBERS:
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context['member'] = member
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self.append('usermod -a -G %(user)s %(member)s || exit_code=$?' % context)
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if not user.is_main:
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self.append('usermod -a -G %(user)s %(mainuser)s || exit_code=$?' % context)
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def delete(self, user):
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context = self.get_context(user)
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if not context['user']:
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return
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self.append(textwrap.dedent("""
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# Delete %(user)s user
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nohup bash -c 'sleep 2 && killall -u %(user)s -s KILL' &> /dev/null &
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killall -u %(user)s || true
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userdel %(user)s || exit_code=$?
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groupdel %(group)s || exit_code=$?\
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""") % context
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)
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if context['deleted_home']:
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self.append(textwrap.dedent("""\
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# Move home into SYSTEMUSERS_MOVE_ON_DELETE_PATH, nesting if exists.
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deleted_home="%(deleted_home)s"
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while [[ -e "$deleted_home" ]]; do
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deleted_home="${deleted_home}/$(basename ${deleted_home})"
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done
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mv '%(base_home)s' "$deleted_home" || exit_code=$?
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""") % context
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)
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else:
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self.append("rm -fr -- '%(base_home)s'" % context)
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def grant_permissions(self, user, context):
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context['perms'] = user.set_perm_perms
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# Capital X adds execution permissions for directories, not files
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context['perms_X'] = context['perms'] + 'X'
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self.append(textwrap.dedent("""\
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# Grant execution permissions to every parent directory
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for access_path in %(access_paths)s; do
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# Preserve existing ACLs
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acl=$(getfacl -a "$access_path" | grep '^user:%(user)s:') && {
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perms=$(echo "$acl" | cut -d':' -f3)
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perms=$(echo "$perms" | cut -c 1,2)x
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setfacl -m u:%(user)s:$perms "$access_path"
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} || setfacl -m u:%(user)s:--x "$access_path"
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done
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# Grant perms to existing files, excluding execution
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find '%(perm_to)s' -type f %(exclude_acl)s \\
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-exec setfacl -m u:%(user)s:%(perms)s {} \\;
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# Grant perms to extisting directories and set defaults for future content
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find '%(perm_to)s' -type d %(exclude_acl)s \\
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-exec setfacl -m u:%(user)s:%(perms_X)s -m d:u:%(user)s:%(perms_X)s {} \\;
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# Account group as the owner of new files
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chmod g+s '%(perm_to)s'""") % context
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)
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if not user.is_main:
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self.append(textwrap.dedent("""\
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# Grant access to main user
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find '%(perm_to)s' -type d %(exclude_acl)s \\
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-exec setfacl -m d:u:%(mainuser)s:rwx {} \\;\
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""") % context
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)
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def revoke_permissions(self, user, context):
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revoke_perms = {
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'rw': '',
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'r': 'w',
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'w': 'r',
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}
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context.update({
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'perms': revoke_perms[user.set_perm_perms],
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'option': '-x' if user.set_perm_perms == 'rw' else '-m'
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})
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self.append(textwrap.dedent("""\
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# Revoke permissions
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find '%(perm_to)s' %(exclude_acl)s \\
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-exec setfacl %(option)s u:%(user)s:%(perms)s {} \\;\
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""") % context
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)
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def set_permission(self, user):
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context = self.get_context(user)
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context.update({
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'perm_action': user.set_perm_action,
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'perm_to': os.path.join(user.set_perm_base_home, user.set_perm_home_extension),
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})
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exclude_acl = []
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for exclude in settings.SYSTEMUSERS_FORBIDDEN_PATHS:
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context['exclude_acl'] = os.path.join(user.set_perm_base_home, exclude)
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exclude_acl.append('-not -path "%(exclude_acl)s"' % context)
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context['exclude_acl'] = ' \\\n -a '.join(exclude_acl) if exclude_acl else ''
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# Access paths
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head = user.set_perm_base_home
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relative = ''
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access_paths = ["'%s'" % head]
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for tail in user.set_perm_home_extension.split(os.sep)[:-1]:
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relative = os.path.join(relative, tail)
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for exclude in settings.SYSTEMUSERS_FORBIDDEN_PATHS:
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if fnmatch.fnmatch(relative, exclude):
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break
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else:
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# No match
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head = os.path.join(head, tail)
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access_paths.append("'%s'" % head)
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context['access_paths'] = ' '.join(access_paths)
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if user.set_perm_action == 'grant':
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self.grant_permissions(user, context)
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elif user.set_perm_action == 'revoke':
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self.revoke_permissions(user, context)
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else:
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raise NotImplementedError()
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def create_link(self, user):
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context = self.get_context(user)
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context.update({
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'link_target': user.create_link_target,
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'link_name': user.create_link_name,
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})
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self.append(textwrap.dedent("""\
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# Create link
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su - %(user)s --shell /bin/bash << 'EOF' || exit_code=1
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if [[ ! -e '%(link_name)s' ]]; then
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ln -s '%(link_target)s' '%(link_name)s'
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else
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echo "%(link_name)s already exists, doing nothing." >&2
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exit 1
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fi
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EOF""") % context
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)
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def validate_paths_exist(self, user):
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for path in user.paths_to_validate:
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context = {
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'path': path,
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}
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self.append(textwrap.dedent("""
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if [[ ! -e '%(path)s' ]]; then
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echo "%(path)s path does not exists." >&2
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fi""") % context
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)
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def get_groups(self, user):
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if user.is_main:
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groups = list(user.account.systemusers.exclude(username=user.username).values_list('username', flat=True))
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groups.append("main-systemusers")
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return groups
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groups = list(user.groups.values_list('username', flat=True))
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groups.append("webapp-systemusers")
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return groups
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def get_context(self, user):
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context = {
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'object_id': user.pk,
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'user': user.username,
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'group': user.username,
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'groups': ','.join(self.get_groups(user)),
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'password': user.password if user.active else '*%s' % user.password,
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'shell': user.shell,
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'mainuser': user.username if user.is_main else user.account.username,
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'home': user.get_home(),
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'base_home': user.get_base_home(),
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'mainuser_home': user.main.get_home(),
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}
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context['deleted_home'] = settings.SYSTEMUSERS_MOVE_ON_DELETE_PATH % context
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return replace(context, "'", '"')
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