Colin Walters
09238da065
I'm trying to improve the developer experience on OSTree-managed systems, and I had an epiphany the other day - there's no reason we have to be absolutely against mutating the current rootfs live. The key should be making it easy to rollback/reset to a known good state. I see this command as useful for two related but distinct workflows: - `ostree admin unlock` will assume you're doing "development". The semantics hare are that we mount an overlayfs on `/usr`, but the overlay data is in `/var/tmp`, and is thus discarded on reboot. - `ostree admin unlock --hotfix` first clones your current deployment, then creates an overlayfs over `/usr` persistent to this deployment. Persistent in that now the initramfs switchroot tool knows how to mount it as well. In this model, if you want to discard the hotfix, at the moment you roll back/reboot into the clone. Note originally, I tried using `rofiles-fuse` over `/usr` for this, but then everything immediately explodes because the default (at least CentOS 7) SELinux policy denies tons of things (including `sshd_t` access to `fusefs_t`). Sigh. So the switch to `overlayfs` came after experimentation. It still seems to have some issues...specifically `unix_chkpwd` is broken, possibly because it's setuid? Basically I can't ssh in anymore. But I *can* `rpm -Uvh strace.rpm` which is handy. NOTE: I haven't tested the hotfix path fully yet, specifically the initramfs bits.
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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*
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* Copyright (C) 2013 Colin Walters <walters@verbum.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2 of the licence or (at
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* your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#pragma once
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#include "ostree-bootconfig-parser.h"
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G_BEGIN_DECLS
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#define OSTREE_TYPE_DEPLOYMENT (ostree_deployment_get_type ())
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#define OSTREE_DEPLOYMENT(inst) (G_TYPE_CHECK_INSTANCE_CAST ((inst), OSTREE_TYPE_DEPLOYMENT, OstreeDeployment))
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#define OSTREE_IS_DEPLOYMENT(inst) (G_TYPE_CHECK_INSTANCE_TYPE ((inst), OSTREE_TYPE_DEPLOYMENT))
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typedef struct _OstreeDeployment OstreeDeployment;
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_OSTREE_PUBLIC
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GType ostree_deployment_get_type (void) G_GNUC_CONST;
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_OSTREE_PUBLIC
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guint ostree_deployment_hash (gconstpointer v);
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_OSTREE_PUBLIC
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gboolean ostree_deployment_equal (gconstpointer ap, gconstpointer bp);
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_OSTREE_PUBLIC
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OstreeDeployment * ostree_deployment_new (int index,
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const char *osname,
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const char *csum,
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int deployserial,
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const char *bootcsum,
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int bootserial);
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_OSTREE_PUBLIC
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int ostree_deployment_get_index (OstreeDeployment *self);
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_OSTREE_PUBLIC
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const char *ostree_deployment_get_osname (OstreeDeployment *self);
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_OSTREE_PUBLIC
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int ostree_deployment_get_deployserial (OstreeDeployment *self);
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_OSTREE_PUBLIC
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const char *ostree_deployment_get_csum (OstreeDeployment *self);
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_OSTREE_PUBLIC
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const char *ostree_deployment_get_bootcsum (OstreeDeployment *self);
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_OSTREE_PUBLIC
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int ostree_deployment_get_bootserial (OstreeDeployment *self);
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_OSTREE_PUBLIC
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OstreeBootconfigParser *ostree_deployment_get_bootconfig (OstreeDeployment *self);
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_OSTREE_PUBLIC
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GKeyFile *ostree_deployment_get_origin (OstreeDeployment *self);
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_OSTREE_PUBLIC
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void ostree_deployment_set_index (OstreeDeployment *self, int index);
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_OSTREE_PUBLIC
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void ostree_deployment_set_bootserial (OstreeDeployment *self, int index);
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_OSTREE_PUBLIC
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void ostree_deployment_set_bootconfig (OstreeDeployment *self, OstreeBootconfigParser *bootconfig);
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_OSTREE_PUBLIC
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void ostree_deployment_set_origin (OstreeDeployment *self, GKeyFile *origin);
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_OSTREE_PUBLIC
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OstreeDeployment *ostree_deployment_clone (OstreeDeployment *self);
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_OSTREE_PUBLIC
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char *ostree_deployment_get_origin_relpath (OstreeDeployment *self);
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typedef enum {
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OSTREE_DEPLOYMENT_UNLOCKED_NONE,
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OSTREE_DEPLOYMENT_UNLOCKED_DEVELOPMENT,
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OSTREE_DEPLOYMENT_UNLOCKED_HOTFIX
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} OstreeDeploymentUnlockedState;
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_OSTREE_PUBLIC
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const char *ostree_deployment_unlocked_state_to_string (OstreeDeploymentUnlockedState state);
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_OSTREE_PUBLIC
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OstreeDeploymentUnlockedState ostree_deployment_get_unlocked (OstreeDeployment *self);
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G_END_DECLS
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