David Saff | 782181a | 2022-02-17 21:41:19 +0000 | [diff] [blame] | 1 | name: "androidx-build-sandbox" |
| 2 | description: "Sandboxed AndroidX Build." |
| 3 | description: "No network access and a limited access to local host resources." |
| 4 | |
| 5 | # All configuration options are described in |
| 6 | # https://github.com/google/nsjail/blob/master/config.proto |
| 7 | |
| 8 | # Heavily based on https://source.corp.google.com/android/tools/treble/build/sandbox/nsjail.cfg |
| 9 | |
| 10 | # Run once then exit |
| 11 | mode: ONCE |
| 12 | |
| 13 | # No time limit |
| 14 | time_limit: 0 |
| 15 | |
| 16 | # Limits memory usage |
| 17 | rlimit_as_type: SOFT |
| 18 | # Maximum size of core dump files |
| 19 | rlimit_core_type: SOFT |
| 20 | # Limits use of CPU time |
| 21 | rlimit_cpu_type: SOFT |
| 22 | # Maximum file size |
| 23 | rlimit_fsize_type: SOFT |
| 24 | # Maximum number of file descriptors opened |
| 25 | rlimit_nofile_type: SOFT |
| 26 | # Maximum stack size |
| 27 | rlimit_stack_type: SOFT |
| 28 | # Maximum number of threads |
| 29 | rlimit_nproc_type: SOFT |
| 30 | |
| 31 | # Allow terminal control |
| 32 | # This let's users cancel jobs with CTRL-C |
| 33 | # without exiting the jail |
| 34 | skip_setsid: true |
| 35 | |
| 36 | # Below are all the host paths that shall be mounted |
| 37 | # to the sandbox |
| 38 | |
| 39 | # Mount proc as read/write. |
| 40 | mount { |
| 41 | dst: "/proc" |
| 42 | fstype: "proc" |
| 43 | rw: true |
| 44 | } |
| 45 | |
| 46 | # The sandbox User ID was chosen arbitrarily |
| 47 | uidmap { |
| 48 | inside_id: "999999" |
| 49 | outside_id: "" |
| 50 | count: 1 |
| 51 | } |
| 52 | |
| 53 | # The sandbox Group ID was chosen arbitrarily |
| 54 | gidmap { |
| 55 | inside_id: "65534" |
| 56 | outside_id: "" |
| 57 | count: 1 |
| 58 | } |
| 59 | |
Yigit Boyar | 6ed9510 | 2022-06-02 10:19:01 -0700 | [diff] [blame] | 60 | # AndroidX build heavily relies on ENV variables (OUT_DIR, DIST etc) so we enable them all |
| 61 | # since limiting environment variable access is not a particular goal for us |
| 62 | keep_env: true |
David Saff | 782181a | 2022-02-17 21:41:19 +0000 | [diff] [blame] | 63 | |
David Saff | 782181a | 2022-02-17 21:41:19 +0000 | [diff] [blame] | 64 | mount { |
| 65 | dst: "/tmp" |
| 66 | fstype: "tmpfs" |
| 67 | rw: true |
| 68 | is_bind: false |
| 69 | } |
| 70 | |
| 71 | # Some tools need /dev/shm to created a named semaphore. Use a new tmpfs to |
| 72 | # limit access to the external environment. |
| 73 | mount { |
| 74 | dst: "/dev/shm" |
| 75 | fstype: "tmpfs" |
| 76 | rw: true |
| 77 | is_bind: false |
| 78 | } |
| 79 | |
| 80 | # Map the working User ID to a username |
| 81 | # Some tools like Java need a valid username |
| 82 | mount { |
| 83 | src_content: "nobody:x:999999:65534:nobody:/tmp:/bin/bash" |
| 84 | dst: "/etc/passwd" |
| 85 | mandatory: false |
| 86 | } |
| 87 | |
| 88 | # Define default group |
| 89 | mount { |
| 90 | src_content: "nogroup::65534:nogroup" |
| 91 | dst: "/etc/group" |
| 92 | mandatory: false |
| 93 | } |
| 94 | |
| 95 | # Empty mtab file needed for some build scripts that check for images being mounted |
| 96 | mount { |
| 97 | src_content: "\n" |
| 98 | dst: "/etc/mtab" |
| 99 | mandatory: false |
| 100 | } |
| 101 | |
| 102 | # Explicitly mount required device file nodes |
| 103 | # |
| 104 | # This will enable a chroot based NsJail sandbox. A chroot does not provide |
| 105 | # device file nodes. So just mount the required device file nodes directly |
| 106 | # from the host. |
| 107 | # |
| 108 | # Note that this has no effect in a docker container, since in that case |
| 109 | # NsJail will just mount the container device nodes. When we use NsJail |
| 110 | # in a docker container we mount the full file system root. So the container |
| 111 | # device nodes were already mounted in the NsJail. |
| 112 | |
| 113 | # /dev/null is a very commonly used for silencing output |
| 114 | mount { |
| 115 | src: "/dev/null" |
| 116 | dst: "/dev/null" |
| 117 | rw: true |
| 118 | is_bind: true |
| 119 | } |
| 120 | |
| 121 | # UNUSED options |
| 122 | # These were set in android/tools/treble, but are not useful to us in AndroidX |
| 123 | |
| 124 | # Some tools (like llvm-link) look for file descriptors in /dev/fd |
| 125 | mount { |
| 126 | src: "/proc/self/fd" |
| 127 | dst: "/dev/fd" |
| 128 | is_symlink: true |
| 129 | mandatory: false |
| 130 | } |
| 131 | |
| 132 | # /dev/urandom used during the creation of system.img |
| 133 | mount { |
| 134 | src: "/dev/urandom" |
| 135 | dst: "/dev/urandom" |
| 136 | rw: true |
| 137 | is_bind: true |
| 138 | } |
| 139 | |
| 140 | # /dev/random used by test scripts |
| 141 | mount { |
| 142 | src: "/dev/random" |
| 143 | dst: "/dev/random" |
| 144 | rw: true |
| 145 | is_bind: true |
| 146 | } |
| 147 | |
| 148 | # /dev/zero is required to make vendor-qemu.img |
| 149 | mount { |
| 150 | src: "/dev/zero" |
| 151 | dst: "/dev/zero" |
| 152 | is_bind: true |
| 153 | } |
| 154 | |
| 155 | # The user must mount the source to /src using --bindmount |
| 156 | # It will be set as the initial working directory |
| 157 | # cwd: "/src" |
| 158 | |