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1 | meta-sota | ||
2 | ========= | ||
3 | |||
4 | This layer enables over-the-air updates with OSTree and RVI SOTA client. | ||
5 | |||
6 | [OSTree](https://github.com/ostreedev/ostree) is a tool for atomic full file | ||
7 | system upgrades with rollback capability. Main advantage of OSTree compared | ||
8 | to traditional dual partition model is that OSTree minimizes network bandwidth | ||
9 | and data storage footprint by sharing files with the same contents across file | ||
10 | system deployments. | ||
11 | |||
12 | [RVI SOTA client](https://github.com/advancedtelematic/rvi_sota_client) adds | ||
13 | authentication and provisioning capabilities to OTA and is integrated with | ||
14 | OSTree. | ||
15 | |||
16 | Build | ||
17 | ----- | ||
18 | |||
19 | ### Quickstart ### | ||
20 | [ATS Garage Quickstart](https://github.com/advancedtelematic/garage-quickstart-rpi) | ||
21 | is an example yocto-based project combining stadard poky distribution with | ||
22 | OSTree capabilities. For detailed getting started tutorial see [README](https://github.com/advancedtelematic/garage-quickstart-rpi/blob/master/README.adoc). | ||
23 | |||
24 | ### Adding meta-updater capabilities to your build ### | ||
25 | If you already have a Yocto-base project and you want to add atomic filesystem | ||
26 | updates to it you need to do just three things: | ||
27 | |||
28 | 1. Clone meta-updater layer and add it to your [conf/bblayers.conf](https://www.yoctoproject.org/docs/2.1/ref-manual/ref-manual.html#structure-build-conf-bblayers.conf). | ||
29 | 2. Clone BSP integration layer (meta-updater-${PLATFORM}, e.g. | ||
30 | meta-updater-raspberrypi) and add it to your conf/bblayers.conf. If your board | ||
31 | isn't yet supported, you could write BSP integration work yourself. See [Supported boards](#supported-boards) | ||
32 | section for the details. | ||
33 | 3. Set up your [distro](https://www.yoctoproject.org/docs/2.1/ref-manual/ref-manual.html#var-DISTRO). | ||
34 | If you are using "poky", the default distro in Yocto, you can change it in your | ||
35 | conf/local.conf to "poky-sota". Alternatively if you are using your own or third | ||
36 | party distro configuration, you can add 'require conf/distro/sota.conf.inc' to | ||
37 | it, thus combining capabilities of your distro with meta-updater features. | ||
38 | |||
39 | You can then build your image as usual (bitbake <your-image-name>). After building | ||
40 | the root file system bitbake will then create an [OSTree-enabled version](https://ostree.readthedocs.io/en/latest/manual/adapting-existing/) | ||
41 | of it, commit it to your local OSTree repo and optionally push it to a remote | ||
42 | server. Additionally a live disk image will be created (normally named | ||
43 | ${IMAGE_NAME}.<boardpref>-sdimg-ota e.g. core-image-raspberrypi3.rpi-sdimg-ota). | ||
44 | You can control this behaviour though OSTree-related variables in your | ||
45 | local.conf, see [respective section](#sota-related-variables-in-localconf) | ||
46 | for details. | ||
47 | |||
48 | ### Build with OpenIVI ### | ||
49 | ### Build in AGL ### | ||
50 | |||
51 | With AGL you can just add agl-sota feature while configuring your build | ||
52 | environment as in | ||
53 | |||
54 | source meta-agl/scripts/aglsetup.sh -m porter agl-demo agl-appfw-smack agl-devel agl-sota | ||
55 | |||
56 | you can then just run | ||
57 | |||
58 | bitbake agl-demo-platform | ||
59 | |||
60 | and get as a result "ostree_repo" folder in your images directory | ||
61 | (tmp/deploy/images/${MACHINE}/ostree_repo) containing your OSTree repository | ||
62 | with rootfs committed as an OSTree deployment, 'otaimg' bootstrap image which | ||
63 | is an OSTree physical sysroot as a burnable filesystem image and optionally | ||
64 | some machine-dependent live images (e.g. '*.rpi-sdimg-ota' for Raspberry Pi or | ||
65 | '*.porter-sdimg-ota' Renesas Porter board). | ||
66 | |||
67 | Although aglsetup.sh hooks provide reasonable defaults for SOTA-related | ||
68 | variables you may want to tune some of them. | ||
69 | |||
70 | Supported boards | ||
71 | ---------------- | ||
72 | |||
73 | Currently supported platforms are | ||
74 | |||
75 | * [Raspberry Pi3](https://github.com/advancedtelematic/meta-updater-raspberrypi) | ||
76 | * [Minnowboard](https://github.com/advancedtelematic/meta-updater-minnowboard) | ||
77 | * [Native QEMU emulation](https://github.com/advancedtelematic/meta-updater-qemux86-64) | ||
78 | |||
79 | ### Adding support for your board | ||
80 | If your board isn't yet supported you can add board integration code yourself. | ||
81 | The main purpose of this code is to provide a bootloader that will get use of | ||
82 | [OSTree's boot directory](https://ostree.readthedocs.io/en/latest/manual/atomic-upgrades/) | ||
83 | In meta-updater integration layers finished so far it is done by | ||
84 | |||
85 | 1. Making the board boot into [U-Boot](http://www.denx.de/wiki/U-Boot) | ||
86 | 2. Making U-boot import variables from /boot/loader/uEnv.txt and load the | ||
87 | kernel with initramfs and kernel command line arguments according to what is | ||
88 | set this file. | ||
89 | |||
90 | You may take a look into [Minnowboard](https://github.com/advancedtelematic/meta-updater-minnowboard) | ||
91 | or [Raspberry Pi](https://github.com/advancedtelematic/meta-updater-raspberrypi) | ||
92 | integration layers for examples. | ||
93 | |||
94 | It is still possible to make other loaders work with OSTree as well. | ||
95 | |||
96 | SOTA-related variables in local.conf | ||
97 | ------------------------------------ | ||
98 | |||
99 | * OSTREE_REPO - path to your OSTree repository. | ||
100 | Defaults to "${DEPLOY_DIR_IMAGE}/ostree_repo" | ||
101 | * OSTREE_BRANCHNAME - the branch your rootfs will be committed to. | ||
102 | Defaults to "ota" | ||
103 | * OSTREE_OSNAME - OS deployment name on your target device. For more | ||
104 | information about deployments and osnames see | ||
105 | [OSTree documentation](https://ostree.readthedocs.io/en/latest/manual/deployment/) | ||
106 | Defaults to "poky". | ||
107 | * OSTREE_INITRAMFS_IMAGE - initramfs/initrd image that is used as a proxy while | ||
108 | booting into OSTree deployment. Do not change this setting unless you are | ||
109 | sure that your initramfs can serve as such proxy. | ||
110 | * OSTREE_PUSH_CREDENTIALS - when set adds pushing your ostree commit to a remote | ||
111 | repo. sota-tools will then use credentials in the file pointed to by this | ||
112 | variable. | ||
113 | |||
114 | Usage | ||
115 | ----- | ||
116 | |||
117 | ### OSTree ### | ||
118 | OSTree includes its own simple http server. It just exposes the whole OSTree | ||
119 | repository to the network so that any remote device can pull data from it to | ||
120 | device's local repository. To use OSTree http server you need OSTree installed | ||
121 | on your build machine. Alternatively, you could run version built inside Yocto | ||
122 | using bitbake's [devshell](http://www.openembedded.org/wiki/Devshell). | ||
123 | |||
124 | To expose your repo run ostree trivial-httpd using any free port. | ||
125 | |||
126 | ostree trivial-httpd tmp/deploy/images/qemux86-64/ostree_repo -P 57556 | ||
127 | |||
128 | You can then run from inside your device or QEMU emulation, provided your | ||
129 | network is set up correctly. | ||
130 | |||
131 | # agl-remote identifies the remote server in your local repo | ||
132 | ostree remote add --no-gpg-verify agl-remote http://192.168.7.1:57556 agl-ota | ||
133 | |||
134 | # agl-ota is a branch name in the remote repo, set in OSTREE_BRANCHNAME | ||
135 | ostree pull agl-remote agl-ota | ||
136 | |||
137 | # agl is OS name as set in OSTREE_OSNAME | ||
138 | ostree admin deploy --os=agl agl-remote:agl-ota | ||
139 | |||
140 | After restart you should boot into the newly deployed OS image. | ||
141 | |||
142 | E.g. for the raspberrypi3 you can try this sequence: | ||
143 | |||
144 | # add remote | ||
145 | ostree remote add --no-gpg-verify agl-snapshot https://download.automotivelinux.org/AGL/snapshots/master/latest/raspberrypi3/deploy/images/raspberrypi3/ostree_repo/ agl-ota | ||
146 | |||
147 | # pull | ||
148 | ostree pull agl-snapshot agl-ota | ||
149 | |||
150 | # deploy | ||
151 | ostree admin deploy --os=agl agl-snapshot:agl-ota | ||
152 | |||
153 | ### SOTA tools ### | ||
154 | SOTA tools now contains only one tool, garage-push that lets you push the | ||
155 | changes in OSTree repository generated by bitbake process. It communicates with | ||
156 | an http server capable of querying files with HEAD requests and uploading them | ||
157 | with POST requests. garage-push is used as following: | ||
158 | |||
159 | garage-push --repo=/path/to/ostree-repo --ref=mybranch --credentials=~/.sota-tools.json --user=username --password= | ||
160 | |||
161 | You can set OSTREE_PUSH_CREDENTIALS in your local.conf to make your build | ||
162 | results be automatically synchronized with a remote server. | ||
163 | Credentials are stored in JSON format which is described in [sota-tools documentation](https://github.com/advancedtelematic/sota-tools/blob/master/README.adoc) | ||