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69
CHANGELOG.md
View file

@ -1,69 +0,0 @@
# Changelog
## v1.0 (2019-11-29)
* Append `/etc/resolv.conf.tail` to `/etc/resolv.conf` if it exists.
* Fixed usage.
## v0.9 (2019-06-26)
* Added support for `-c` to specify the probing order of different cloud stacks.
* Added support for OpenNebula's START_SCRIPT methods (user-data alike).
* Added support for OpenNebula's USERNAME method.
* Added support for generating a default user password and writing it into
`~/.ssh/authorized_keys`.
* Fixed handling of OpenNebula SSH_PUBLIC_KEY entries with multiple keys.
* Improved documentation, added `CHANGELOG.md` file.
## v0.8 (2019-06-02)
* Added support for growing the root disk and its last partition (optional).
* Fixed OpenStack support.
* Fixed compilation with LibreSSL on OpenBSD 6.5 or newer.
* Fixed probing order and OpenStack with `169.254.169.254` as the endpoint IP.
* Improved OpenNebula support.
## v0.7 (2018-08-15)
* Added initial support for OpenNebula contextualization.
* Added support for setting a custom login user or "root" with `-U`.
* Added support for writing `resolv.conf` and static network configuration.
* Fixed the generated pf rule that is loaded during cloud-agent operation.
## v0.6 (2018-05-15)
* Fixed compilation with (old) OpenSSL releases.
---
## v0.5 (2018-05-08)
* Fixed the user-data script by loading it from /etc/rc.user-data.
## v0.4 (2018-05-08)
* Added support for user-data that is not base64-encoded.
## v0.3 (2018-05-08)
* Added support for user-data scripts.
* Make the public key optional for stacks that supply a password (e.g. Azure).
## v0.2.2 (2018-05-07)
* Fixed issues in the v0.2.1 release.
## v0.2.2 (2018-05-07)
* Fixed issues in the v0.2 release.
## v0.2 (2018-01-10)
* Added support for OpenStack and its JSON-based meta data.
* Added support for Apache CloudStack.
* Try to get meta data from `dhcp-server-identifier` instead of
`169.254.169.254`.
## v0.1 (2017-07-03)
* Initial release with support for Microsoft Azure and Amazon AWS EC2.

6
LICENSE.md
View file

@ -6,10 +6,10 @@ License
* `cloud-agent` is free software under OpenBSD's ISC-style license. * `cloud-agent` is free software under OpenBSD's ISC-style license.
* Most of the code has been written by Reyk Floeter <reyk@openbsd.org> * Most of the code has been written by Reyk Floeter <reyk@openbsd.org>
* The {http,json}.[ch] files were written by Kristaps Dzonsons <kristaps@bsd.lv> * The http.[ch] files have been written by Kristaps Dzonsons <kristaps@bsd.lv>
* Please refer to the individual source files for other copyright holders! * Please refer to the individual source files for other copyright holders!
> Copyright (c) 2017, 2018, 2019 Reyk Floeter <reyk@openbsd.org> > Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
> >
> Permission to use, copy, modify, and distribute this software for any > Permission to use, copy, modify, and distribute this software for any
> purpose with or without fee is hereby granted, provided that the above > purpose with or without fee is hereby granted, provided that the above
@ -26,5 +26,5 @@ License
`cms/` `cms/`
------ ------
* The CMS code is from OpenSSL and/or LibreSSL. * The CMS code is from the OpenSSL and/or LibreSSL.
* Please refer to the individual source files for other copyright holders! * Please refer to the individual source files for other copyright holders!

5
Makefile
View file

@ -1,13 +1,10 @@
# #
# The Azure agents needs CMS to obtain the SSH public keys. # The Azure agents needs CMS to obtain the SSH public keys.
# LibreSSL has removed CMS, so either use OpenSSL to decrypt CMS # LibreSSL has removed CMS, so either use OpenSSL to decrypt CMS
# messages or compile the old CMS code for LibreSSL. Or use # messages or compile the old CMS code for LibreSSL.
# CMS that has returned to newer versions of LibreSSL.
# #
.ifdef USE_OPENSSL .ifdef USE_OPENSSL
MAKE_FLAGS+= USE_OPENSSL=1 MAKE_FLAGS+= USE_OPENSSL=1
.elifdef USE_LIBRESSL_CMS
MAKE_FLAGS+= USE_LIBRESSL_CMS=1
.else .else
SUBDIR= cms SUBDIR= cms
.endif .endif

26
README.md
View file

@ -23,40 +23,26 @@ has removed CMS which is required by Azure.
Usage Usage
----- -----
See the [cloud-agent(8)](cloud-agent.md) documentation for more Installation is easy, `cloud-agent` detects the cloud type automatically.
information about the usage.
Basic installation is easy, `cloud-agent` detects the cloud type
automatically.
* On Microsoft Azure, create a file `/etc/hostname.hvn0` * On Microsoft Azure, create a file `/etc/hostname.hvn0`
* On Amazon AWS, create a file `/etc/hostname.xnf0` * On Amazon AWS, create a file `/etc/hostname.xnf0`
* On CloudStack, such as Exoscale, create a file `/etc/hostname.vio0` * On Exoscale, create a file `/etc/hostname.vio0`
* On OpenBSD VMM (with meta-data), create a file `/etc/hostname.vio0` * On OpenBSD VMM (with meta-data), create a file `/etc/hostname.vio0`
* On OpenStack/VMware, create a file `/etc/hostname.vmx0` * On OpenStack/VMware, create a file `/etc/hostname.vmx0`
* The content of the file is identical for all of the above: * On OpenNebula, create a file `/etc/hostname.if`
where _if_ is the name of your primary interface.
* The content of the file is identical for all of them:
dhcp dhcp
!/usr/local/libexec/cloud-agent "\$if" !/usr/local/libexec/cloud-agent "\$if"
* On OpenNebula, such as Data Center Light, create a file `/etc/hostname.if`
where _if_ is the name of your primary interface.
The `dhcp` line should be ommitted in the file:
!/usr/local/libexec/cloud-agent "\$if"
Releases
--------
See the [Changelog](CHANGELOG.md) for a summary of changes and
download the releases from the
[release page](https://github.com/reyk/cloud-agent/releases).
Author Author
------ ------

47
agent/azure.c
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2017, 2018, 2019 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
* *
* Permission to use, copy, modify, and distribute this software for any * Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -23,11 +23,8 @@
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <pwd.h>
#include <err.h> #include <err.h>
#include <openssl/opensslv.h>
#include "main.h" #include "main.h"
#include "http.h" #include "http.h"
#include "xml.h" #include "xml.h"
@ -65,22 +62,16 @@ azure(struct system_config *sc)
{ {
int ret = -1; int ret = -1;
if (sc->sc_state == STATE_INIT) { sc->sc_stack = "azure";
free(sc->sc_username);
if ((sc->sc_username = strdup("azure-user")) == NULL) {
log_warnx("failed to set default user");
return (-1);
}
/* Apply defaults */ /* Apply defaults */
sc->sc_ovfenv = "/var/db/azure-ovf-env.xml"; free(sc->sc_username);
sc->sc_priv = &az_config; if ((sc->sc_username = strdup("azure-user")) == NULL) {
sc->sc_state = STATE_DHCP; log_warnx("failed to set default user");
return (-1); goto fail;
} }
sc->sc_ovfenv = "/var/db/azure-ovf-env.xml";
/* Don't try other endpoints */ sc->sc_priv = &az_config;
sc->sc_state = STATE_DONE;
if (azure_getovfenv(sc) != 0) { if (azure_getovfenv(sc) != 0) {
log_warnx("failed to get ovf-env.xml"); log_warnx("failed to get ovf-env.xml");
@ -443,16 +434,13 @@ azure_certificates(struct system_config *sc)
fd = disable_output(sc, STDERR_FILENO); fd = disable_output(sc, STDERR_FILENO);
#if defined(USE_OPENSSL) #ifdef USE_OPENSSL
/* /*
* XXX Now comes the part that needs CMS which is only * XXX Now comes the part that needs CMS which is only
* XXX present in OpenSSL but got removed from LibreSSL. * XXX present in OpenSSL but got removed from LibreSSL.
*/ */
log_debug("%s: running openssl cms", __func__); log_debug("%s: running openssl cms", __func__);
if (shell("/usr/local/bin/eopenssl", "cms", /* )) */ if (shell("/usr/local/bin/eopenssl", "cms", /* )) */
#elif defined(USE_LIBRESSL_CMS) || LIBRESSL_VERSION_NUMBER > 0x3000200fL
/* And CMS returned to LibreSSL! */
if (shell("/usr/bin/openssl", "cms", /* )) */
#else #else
if (shell("/usr/local/bin/cms", if (shell("/usr/local/bin/cms",
#endif #endif
@ -731,7 +719,7 @@ azure_getovfenv(struct system_config *sc)
} }
if ((xe = xml_findl(&xp->xe_head, "UserPassword", NULL)) != NULL) { if ((xe = xml_findl(&xp->xe_head, "UserPassword", NULL)) != NULL) {
if ((sc->sc_password_hash = calloc(1, _PASSWORD_LEN)) == NULL) { if ((sc->sc_password = calloc(1, 128)) == NULL) {
log_debug("%s: password failed", __func__); log_debug("%s: password failed", __func__);
goto done; goto done;
} }
@ -739,14 +727,13 @@ azure_getovfenv(struct system_config *sc)
str = strndup(xe->xe_data, xe->xe_datalen); str = strndup(xe->xe_data, xe->xe_datalen);
if (str == NULL || if (str == NULL ||
crypt_newhash(str, "bcrypt,a", crypt_newhash(str, "bcrypt,a",
sc->sc_password_hash, _PASSWORD_LEN) != 0) { sc->sc_password, 128) != 0) {
log_debug("%s: password hashing failed", __func__); log_debug("%s: password hashing failed", __func__);
free(sc->sc_password_hash); free(sc->sc_password);
sc->sc_password_hash = NULL; sc->sc_password = NULL;
free(str); free(str);
goto done; goto done;
} }
explicit_bzero(str, xe->xe_datalen);
free(str); free(str);
/* Replace unencrypted password with hash */ /* Replace unencrypted password with hash */
@ -756,11 +743,11 @@ azure_getovfenv(struct system_config *sc)
/* Update element for xml_print() below */ /* Update element for xml_print() below */
explicit_bzero(xe->xe_data, xe->xe_datalen); explicit_bzero(xe->xe_data, xe->xe_datalen);
free(xe->xe_data); free(xe->xe_data);
xe->xe_data = strdup(sc->sc_password_hash); xe->xe_data = strdup(sc->sc_password);
xe->xe_datalen = strlen(sc->sc_password_hash); xe->xe_datalen = strlen(sc->sc_password);
} else if ((xe = xml_findl(&xp->xe_head, } else if ((xe = xml_findl(&xp->xe_head,
"UserPasswordHash", NULL)) != NULL) { "UserPasswordHash", NULL)) != NULL) {
if ((sc->sc_password_hash = if ((sc->sc_password =
get_word(xe->xe_data, xe->xe_datalen)) != NULL) { get_word(xe->xe_data, xe->xe_datalen)) != NULL) {
log_debug("%s: password hash failed", __func__); log_debug("%s: password hash failed", __func__);
goto done; goto done;

40
agent/cloud-agent.8
View file

@ -1,6 +1,6 @@
.\" $OpenBSD: mdoc.template,v 1.15 2014/03/31 00:09:54 dlg Exp $ .\" $OpenBSD: mdoc.template,v 1.15 2014/03/31 00:09:54 dlg Exp $
.\" .\"
.\" Copyright (c) 2017, 2018, 2019 Reyk Floeter <reyk@openbsd.org> .\" Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
.\" .\"
.\" Permission to use, copy, modify, and distribute this software for any .\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above .\" purpose with or without fee is hereby granted, provided that the above
@ -23,8 +23,6 @@
.Sh SYNOPSIS .Sh SYNOPSIS
.Nm cloud-agent .Nm cloud-agent
.Op Fl nuv .Op Fl nuv
.Op Fl c Ar cloud Ns Op , Ns Ar cloud Ns ...
.Op Fl p Ar length
.Op Fl r Ar rootdisk .Op Fl r Ar rootdisk
.Op Fl t Ar timeout .Op Fl t Ar timeout
.Op Fl U Ar username .Op Fl U Ar username
@ -33,42 +31,10 @@
The The
.Nm .Nm
program manages the OpenBSD provisioning and VM interaction in cloud program manages the OpenBSD provisioning and VM interaction in cloud
environments. environments, including Microsoft Azure and Amazon AWS.
.Pp .Pp
The options are as follows: The options are as follows:
.Bl -tag -width Ds .Bl -tag -width Ds
.It Fl c Ar cloud Ns Op , Ns Ar cloud Ns ...
Probe a list of cloud stacks for provisioning in the specified order.
If this option is not specified,
.Nm
tries to detect the environment and possible cloud stacks automatically.
Supported
.Ar cloud
stacks are:
.Pp
.Bl -tag -width opennebula -offset indent -compact
.It Ic azure
Microsoft Azure
.It Ic cloudinit
Generic cloud-init
.It Ic ec2
Amazon AWS EC2
.It Ic opennebula
OpenNebula
.It Ic openstack
OpenStack
.El
.It Fl p Ar length
Generate and set a random password for the default user.
The password will be written in its plain form into the
.Pa ~/.ssh/authorized_keys
file.
This allows to use the
.Xr doas 1
command to gain root privileges.
The minimum
.Ar length
is 8 characters and the default is an empty password.
.It Fl n .It Fl n
Do not configure the system and skip the provisioning step. Do not configure the system and skip the provisioning step.
.It Fl t Ar timeout .It Fl t Ar timeout
@ -112,8 +78,6 @@ dhcp
.Ed .Ed
.Sh FILES .Sh FILES
.Bl -tag -width "/usr/local/libexec/cloud-agentX" -compact .Bl -tag -width "/usr/local/libexec/cloud-agentX" -compact
.It Pa ~/.ssh/authorized_keys
The location of the agent-configured SSH public keys and optional password.
.It Pa /usr/local/libexec/cloud-agent .It Pa /usr/local/libexec/cloud-agent
The agent itself. The agent itself.
.It Pa /usr/local/bin/cms .It Pa /usr/local/bin/cms

26
agent/cloudinit.c
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2017, 2018, 2019 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
* *
* Permission to use, copy, modify, and distribute this software for any * Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -34,26 +34,28 @@ static int cloudinit_fetch(struct system_config *);
int int
ec2(struct system_config *sc) ec2(struct system_config *sc)
{ {
if (sc->sc_state == STATE_INIT) { free(sc->sc_username);
free(sc->sc_username); if ((sc->sc_username = strdup("ec2-user")) == NULL ||
if ((sc->sc_username = strdup("ec2-user")) == NULL) { (sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set default user"); log_warnx("failed to set defaults");
return (-1);
}
sc->sc_state = STATE_169;
return (-1); return (-1);
} }
return cloudinit_fetch(sc);
sc->sc_stack = "ec2";
return (cloudinit_fetch(sc));
} }
int int
cloudinit(struct system_config *sc) cloudinit(struct system_config *sc)
{ {
if (sc->sc_state == STATE_INIT) { if ((dhcp_getendpoint(sc) == -1) &&
sc->sc_state = STATE_DHCP; (sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
return (-1); return (-1);
} }
return cloudinit_fetch(sc);
sc->sc_stack = "cloudinit";
return (cloudinit_fetch(sc));
} }
static int static int

34
agent/growdisk.c
View file

@ -32,8 +32,6 @@
#include "main.h" #include "main.h"
#define MEG(_n) ((_n) * DEV_BSIZE / 1024 / 1024)
static uint16_t dkcksum(struct disklabel *); static uint16_t dkcksum(struct disklabel *);
static uint16_t static uint16_t
@ -50,21 +48,19 @@ dkcksum(struct disklabel *lp)
int int
growdisk(struct system_config *sc) growdisk(struct system_config *sc)
{ {
char c, last_part = 0, *out = NULL, *path = NULL; char c, last_part = 0, *out, *path = NULL;
int ret = -1, i, errfd, outfd; int ret = -1, i, errfd, outfd;
uint64_t bend, psize;
struct partition *pp, *p = NULL; struct partition *pp, *p = NULL;
struct disklabel lp; struct disklabel lp;
uint16_t cksum;
int fd; int fd;
uint16_t cksum;
/* /*
* Grow the OpenBSD MBR partition * Grow the OpenBSD MBR partition
*/ */
/* XXX this is a bit ugly but easier to do */ /* XXX this is a bit ugly but easier to do */
if (!sc->sc_dryrun && if (shellout("e 3\n\n\n\n*\nw\nq\n", &out,
shellout("e 3\n\n\n\n*\nw\nq\n", &out,
"fdisk", "-e", sc->sc_rootdisk, NULL) != 0) { "fdisk", "-e", sc->sc_rootdisk, NULL) != 0) {
log_warnx("failed to grow OpenBSD partition"); log_warnx("failed to grow OpenBSD partition");
return (-1); return (-1);
@ -114,30 +110,11 @@ growdisk(struct system_config *sc)
goto done; goto done;
} }
bend = DL_GETDSIZE(&lp) - DL_GETBSTART(&lp);
psize = bend - DL_GETPOFFSET(p);
/* Only grow, but never shring the disk */
if (bend <= DL_GETBEND(&lp) && psize <= DL_GETPSIZE(p)) {
log_debug("%s: not growing %s%c, size is %lluMB",
__func__, sc->sc_rootdisk, last_part, MEG(psize));
ret = 0;
} else {
log_info("growing %s%c from %lluMB to %lluMB",
sc->sc_rootdisk, last_part,
MEG(DL_GETPSIZE(p)), MEG(psize));
ret = -1;
}
if (sc->sc_dryrun || ret == 0) {
ret = 0;
goto done;
}
/* Update OpenBSD boundaries */ /* Update OpenBSD boundaries */
DL_SETBEND(&lp, bend); DL_SETBEND(&lp, DL_GETDSIZE(&lp) - DL_GETBSTART(&lp));
/* Update the size of the last partition */ /* Update the size of the last partition */
DL_SETPSIZE(p, psize); DL_SETPSIZE(p, DL_GETBEND(&lp) - DL_GETPOFFSET(p));
lp.d_checksum = dkcksum(&lp); lp.d_checksum = dkcksum(&lp);
@ -160,7 +137,6 @@ growdisk(struct system_config *sc)
(void)shell("growfs", "-yq", path, NULL); (void)shell("growfs", "-yq", path, NULL);
if ((ret = shell("fsck", "-y", path, NULL)) != 0) if ((ret = shell("fsck", "-y", path, NULL)) != 0)
ret = -1; ret = -1;
(void)shell("mount", "-a", "-t", "nonfs,vnd", NULL);
enable_output(sc, STDERR_FILENO, errfd); enable_output(sc, STDERR_FILENO, errfd);
enable_output(sc, STDOUT_FILENO, outfd); enable_output(sc, STDOUT_FILENO, outfd);

269
agent/main.c
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2017, 2018, 2019 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2017, 2018 Reyk Floeter <reyk@openbsd.org>
* *
* Permission to use, copy, modify, and distribute this software for any * Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -37,7 +37,6 @@
#include <fcntl.h> #include <fcntl.h>
#include <errno.h> #include <errno.h>
#include <poll.h> #include <poll.h>
#include <pwd.h>
#include <err.h> #include <err.h>
#include "main.h" #include "main.h"
@ -50,13 +49,11 @@ static int agent_configure(struct system_config *);
static int agent_network(struct system_config *); static int agent_network(struct system_config *);
static void agent_free(struct system_config *); static void agent_free(struct system_config *);
static int agent_pf(struct system_config *, int); static int agent_pf(struct system_config *, int);
static int agent_userdata(struct system_config *, static int agent_userdata(const unsigned char *, size_t);
const unsigned char *, size_t);
static void agent_unconfigure(void); static void agent_unconfigure(void);
static char *metadata_parse(char *, size_t, enum strtype); static char *metadata_parse(char *, size_t, enum strtype);
static int agent_timeout; static int agent_timeout;
static char *cloudnames[] = CLOUDNAMES;
int int
shell(const char *arg, ...) shell(const char *arg, ...)
@ -362,19 +359,13 @@ agent_free(struct system_config *sc)
log_debug("%s: unmounted %s", __func__, sc->sc_cdrom); log_debug("%s: unmounted %s", __func__, sc->sc_cdrom);
} }
if (sc->sc_password_plain != NULL) { free(sc->sc_args);
/* XXX can be removed with calloc_conceal() post-6.6 */
explicit_bzero(sc->sc_password_plain,
strlen(sc->sc_password_plain));
free(sc->sc_password_plain);
}
free(sc->sc_password_hash);
free(sc->sc_hostname); free(sc->sc_hostname);
free(sc->sc_username); free(sc->sc_username);
free(sc->sc_password);
free(sc->sc_userdata); free(sc->sc_userdata);
free(sc->sc_endpoint); free(sc->sc_endpoint);
free(sc->sc_instance); free(sc->sc_instance);
free(sc->sc_args);
close(sc->sc_nullfd); close(sc->sc_nullfd);
while ((ssh = TAILQ_FIRST(&sc->sc_pubkeys))) { while ((ssh = TAILQ_FIRST(&sc->sc_pubkeys))) {
@ -636,7 +627,6 @@ agent_pf(struct system_config *sc, int open)
static int static int
agent_configure(struct system_config *sc) agent_configure(struct system_config *sc)
{ {
char pwbuf[_PASSWORD_LEN + 2];
struct ssh_pubkey *ssh; struct ssh_pubkey *ssh;
char *str1, *str2; char *str1, *str2;
@ -678,30 +668,18 @@ agent_configure(struct system_config *sc)
} }
/* password */ /* password */
if (sc->sc_password_hash == NULL) { if (sc->sc_password == NULL) {
if (asprintf(&str2, "permit keepenv nopass %s as root\n" if (asprintf(&str2, "permit keepenv nopass %s as root\n"
"permit keepenv nopass root\n", sc->sc_username) == -1) "permit keepenv nopass root\n", sc->sc_username) == -1)
str2 = NULL; str2 = NULL;
} else { } else {
if (shell("usermod", "-p", sc->sc_password_hash, if (shell("usermod", "-p", sc->sc_password,
sc->sc_username, NULL) != 0) sc->sc_username, NULL) != 0)
log_warnx("password failed"); log_warnx("password failed");
if (asprintf(&str2, "permit keepenv persist %s as root\n" if (asprintf(&str2, "permit keepenv persist %s as root\n"
"permit keepenv nopass root\n", sc->sc_username) == -1) "permit keepenv nopass root\n", sc->sc_username) == -1)
str2 = NULL; str2 = NULL;
/* write generated password as comment to authorized_keys */
if (sc->sc_password_plain != NULL) {
snprintf(pwbuf, sizeof(pwbuf), "# %s",
sc->sc_password_plain);
if (fileout(pwbuf, "w",
"%s/%s/.ssh/authorized_keys",
strcmp("root", sc->sc_username) == 0 ? "" : "/home",
sc->sc_username) != 0)
log_warnx("password comment failed");
explicit_bzero(pwbuf, sizeof(pwbuf));
}
} }
/* doas */ /* doas */
@ -711,7 +689,7 @@ agent_configure(struct system_config *sc)
free(str2); free(str2);
/* ssh configuration */ /* ssh configuration */
if (sc->sc_password_hash == NULL && !TAILQ_EMPTY(&sc->sc_pubkeys)) if (sc->sc_password == NULL && !TAILQ_EMPTY(&sc->sc_pubkeys))
str1 = "/PasswordAuthentication/" str1 = "/PasswordAuthentication/"
"s/.*/PasswordAuthentication no/"; "s/.*/PasswordAuthentication no/";
else else
@ -735,7 +713,7 @@ agent_configure(struct system_config *sc)
} }
if (sc->sc_userdata) { if (sc->sc_userdata) {
if (agent_userdata(sc, sc->sc_userdata, if (agent_userdata(sc->sc_userdata,
strlen(sc->sc_userdata)) != 0) strlen(sc->sc_userdata)) != 0)
log_warnx("user-data failed"); log_warnx("user-data failed");
} }
@ -759,8 +737,7 @@ agent_configure(struct system_config *sc)
} }
static int static int
agent_userdata(struct system_config *sc, agent_userdata(const unsigned char *userdata, size_t len)
const unsigned char *userdata, size_t len)
{ {
char *shebang = NULL, *str = NULL, *line = NULL; char *shebang = NULL, *str = NULL, *line = NULL;
const char *file; const char *file;
@ -783,7 +760,7 @@ agent_userdata(struct system_config *sc,
/* Decode user-data and call the function again */ /* Decode user-data and call the function again */
if ((str = calloc(1, len + 1)) == NULL || if ((str = calloc(1, len + 1)) == NULL ||
(len = b64_pton(userdata, str, len)) < 1 || (len = b64_pton(userdata, str, len)) < 1 ||
agent_userdata(sc, str, len) != 0) { agent_userdata(str, len) != 0) {
log_warnx("failed to decode user-data"); log_warnx("failed to decode user-data");
goto fail; goto fail;
} }
@ -803,9 +780,6 @@ agent_userdata(struct system_config *sc,
goto fail; goto fail;
} }
if (sc->sc_dryrun)
goto done;
/* write user-data script into file */ /* write user-data script into file */
file = "/etc/rc.user-data"; file = "/etc/rc.user-data";
if (fileout(str, "w", file) != 0) { if (fileout(str, "w", file) != 0) {
@ -838,7 +812,7 @@ agent_network(struct system_config *sc)
const char *family; const char *family;
char domain[(NI_MAXHOST + 1) * 6 + 8]; /* up to 6 domains */ char domain[(NI_MAXHOST + 1) * 6 + 8]; /* up to 6 domains */
int has_domain = 0; int has_domain = 0;
char ifidx[UINT16_MAX], *str; char ifidx[UINT16_MAX];
const char *comment = "# Generated by cloud-agent"; const char *comment = "# Generated by cloud-agent";
if (!sc->sc_network) if (!sc->sc_network)
@ -907,12 +881,6 @@ agent_network(struct system_config *sc)
if (has_domain) if (has_domain)
fileout(domain, "a", "/etc/resolv.conf"); fileout(domain, "a", "/etc/resolv.conf");
/* append resolv.conf.tail if it exists */
if ((str = filein("r", "/etc/resolv.conf.tail")) != NULL) {
fileout(str, "a", "/etc/resolv.conf");
free(str);
}
return (0); return (0);
} }
@ -942,11 +910,9 @@ agent_unconfigure(void)
(void)fileout("permit keepenv persist :wheel as root\n" (void)fileout("permit keepenv persist :wheel as root\n"
"permit keepenv nopass root\n", "w", "/etc/doas.conf"); "permit keepenv nopass root\n", "w", "/etc/doas.conf");
/* Remove cloud-instance file */
(void)unlink("/var/db/cloud-instance");
} }
static char * static char *
metadata_parse(char *s, size_t sz, enum strtype type) metadata_parse(char *s, size_t sz, enum strtype type)
{ {
@ -977,8 +943,7 @@ metadata(struct system_config *sc, const char *path, enum strtype type)
g = http_get(&sc->sc_addr, 1, g = http_get(&sc->sc_addr, 1,
sc->sc_endpoint, 80, path, NULL, 0, NULL); sc->sc_endpoint, 80, path, NULL, 0, NULL);
if (g != NULL) if (g != NULL)
log_debug("%s: HTTP %d http://%s%s", __func__, g->code, log_debug("%s: HTTP %d %s", __func__, g->code, path);
sc->sc_endpoint, path);
if (g != NULL && g->code == 200 && g->bodypartsz > 0) if (g != NULL && g->code == 200 && g->bodypartsz > 0)
str = metadata_parse(g->bodypart, g->bodypartsz, type); str = metadata_parse(g->bodypart, g->bodypartsz, type);
@ -1116,8 +1081,7 @@ dhcp_getendpoint(struct system_config *sc)
sc->sc_addr.ip = sc->sc_endpoint; sc->sc_addr.ip = sc->sc_endpoint;
sc->sc_addr.family = 4; sc->sc_addr.family = 4;
if (log_getverbose() > 2) log_debug("%s: %s", __func__, ep);
log_debug("%s: %s", __func__, ep);
return (0); return (0);
} }
@ -1127,9 +1091,8 @@ usage(void)
{ {
extern char *__progname; extern char *__progname;
fprintf(stderr, "usage: %s [-nuv] " fprintf(stderr, "usage: %s [-nuv] [-r rootdisk] [-t 3] [-U puffy] "
"[-c cloud[,...]] [-p length] [-r rootdisk]\n\t" "interface\n", __progname);
"[-t 3] [-U puffy] interface\n", __progname);
exit(1); exit(1);
} }
@ -1163,163 +1126,23 @@ get_args(int argc, char *const *argv)
return (args); return (args);
} }
static char *
pwgen(size_t len, char **hash)
{
char *password;
size_t i, alphabet_len;
const char *alphabet =
"0123456789_"
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
alphabet_len = strlen(alphabet);
*hash = NULL;
/* XXX use calloc_conceal() post-6.6 */
if ((password = calloc(1, len + 1)) == NULL)
return (NULL);
/* Simple password generator */
for (i = 0; i < len; i++)
password[i] = alphabet[arc4random_uniform(alphabet_len)];
if ((*hash = calloc(1, _PASSWORD_LEN)) == NULL) {
freezero(password, len + 1);
return (NULL);
}
if (crypt_newhash(password, "bcrypt,a",
*hash, _PASSWORD_LEN) != 0) {
freezero(password, len + 1);
freezero(*hash, _PASSWORD_LEN);
password = NULL;
*hash = NULL;
}
return (password);
}
static void
cloud_add(enum cloudname name, struct clouds *clouds)
{
struct cloud *cloud;
TAILQ_FOREACH(cloud, clouds, cloud_entry) {
if (cloud->cloud_name == name)
fatalx("cloud %s defined twice",
cloudnames[name]);
}
if ((cloud = calloc(1, sizeof(*cloud))) == NULL)
fatal("%s: calloc", __func__);
cloud->cloud_name = name;
switch (name) {
case AZURE:
cloud->fetch = azure;
break;
case CLOUDINIT:
cloud->fetch = cloudinit;
break;
case EC2:
cloud->fetch = ec2;
break;
case OPENNEBULA:
cloud->fetch = opennebula;
break;
case OPENSTACK:
cloud->fetch = openstack;
break;
}
TAILQ_INSERT_TAIL(clouds, cloud, cloud_entry);
}
static int
trycloud(struct system_config *sc, struct cloud *cloud)
{
int errfd = -1, ret = -1;
free(sc->sc_endpoint);
sc->sc_endpoint = NULL;
switch (sc->sc_state) {
case STATE_INIT:
if ((cloud = TAILQ_FIRST(sc->sc_clouds)) == NULL)
return (0);
sc->sc_stack = cloudnames[cloud->cloud_name];
log_debug("%s: %s", __func__, sc->sc_stack);
TAILQ_REMOVE(sc->sc_clouds, cloud, cloud_entry);
break;
case STATE_DHCP:
sc->sc_state = STATE_169;
if (dhcp_getendpoint(sc) == -1)
return trycloud(sc, cloud);
break;
case STATE_169:
sc->sc_state = STATE_DONE;
if ((sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
goto done;
}
break;
case STATE_DONE:
sc->sc_state = STATE_INIT;
ret = trycloud(sc, NULL);
goto done;
}
errfd = disable_output(sc, STDERR_FILENO);
ret = (*cloud->fetch)(sc);
enable_output(sc, STDERR_FILENO, errfd);
if (ret != 0)
return trycloud(sc, cloud);
done:
free(cloud);
return (0);
}
int int
main(int argc, char *const *argv) main(int argc, char *const *argv)
{ {
struct system_config *sc; struct system_config *sc;
int verbose = 0, dryrun = 0, unconfigure = 0, sub; int verbose = 0, dryrun = 0, unconfigure = 0;
int genpw = 0, ch, ret, timeout = CONNECT_TIMEOUT; int ch, ret, timeout = CONNECT_TIMEOUT;
const char *error = NULL, *rootdisk = NULL; const char *error = NULL, *rootdisk = NULL;
char *args, *username = NULL, *options, *value; char *args, *username = NULL;
struct clouds clouds;
/* log to stderr */
log_init(1, LOG_DAEMON);
if ((args = get_args(argc, argv)) == NULL) if ((args = get_args(argc, argv)) == NULL)
fatalx("failed to save args"); fatalx("failed to save args");
TAILQ_INIT(&clouds); while ((ch = getopt(argc, argv, "nr:t:U:uv")) != -1) {
while ((ch = getopt(argc, argv, "c:np:r:t:U:uv")) != -1) {
switch (ch) { switch (ch) {
case 'c':
options = optarg;
while (*options) {
if ((sub = getsubopt(&options,
cloudnames, &value)) == -1)
fatalx("invalid cloud stack");
else if (value != NULL)
fatalx("unexpected value");
cloud_add(sub, &clouds);
}
break;
case 'n': case 'n':
dryrun = 1; dryrun = 1;
break; break;
case 'p':
genpw = strtonum(optarg, 8, 8192, &error);
if (error != NULL)
fatalx("invalid password length: %s", error);
break;
case 'r': case 'r':
rootdisk = optarg; rootdisk = optarg;
break; break;
@ -1346,6 +1169,8 @@ main(int argc, char *const *argv)
argv += optind; argv += optind;
argc -= optind; argc -= optind;
/* log to stderr */
log_init(1, LOG_DAEMON);
log_setverbose(verbose); log_setverbose(verbose);
if (unconfigure) { if (unconfigure) {
@ -1368,50 +1193,24 @@ main(int argc, char *const *argv)
if (rootdisk != NULL && growdisk(sc) == -1) if (rootdisk != NULL && growdisk(sc) == -1)
fatalx("failed to grow %s", rootdisk); fatalx("failed to grow %s", rootdisk);
sc->sc_clouds = &clouds;
sc->sc_args = args; sc->sc_args = args;
if (username != NULL) { if (username != NULL) {
free(sc->sc_username); free(sc->sc_username);
sc->sc_username = username; sc->sc_username = username;
} }
if (TAILQ_EMPTY(&clouds)) { /*
/* * XXX Detect cloud with help from hostctl and sysctl
* XXX Auto-detect cloud with help from hostctl and * XXX in addition to the interface name.
* XXX sysctl in addition to the interface name. */
*/ if (opennebula(sc) == 0)
if (strcmp("hvn0", sc->sc_interface) == 0) { ret = 0;
cloud_add(AZURE, &clouds); else if (strcmp("hvn0", sc->sc_interface) == 0)
} else if (strcmp("xnf0", sc->sc_interface) == 0) { ret = azure(sc);
cloud_add(OPENNEBULA, &clouds); else if (strcmp("xnf0", sc->sc_interface) == 0)
cloud_add(EC2, &clouds); ret = ec2(sc);
} else { else
cloud_add(OPENNEBULA, &clouds); ret = openstack(sc);
cloud_add(OPENSTACK, &clouds);
cloud_add(CLOUDINIT, &clouds);
}
}
ret = trycloud(sc, NULL);
if (genpw) {
if (sc->sc_password_hash != NULL)
log_debug("%s: user password hash: %s", __func__,
sc->sc_password_hash);
else if ((sc->sc_password_plain = pwgen(genpw,
&sc->sc_password_hash)) != NULL) {
if (log_getverbose() > 2)
log_debug("%s: generated password: %s",
__func__, sc->sc_password_plain);
} else
log_warnx("failed to generate password");
}
/* Debug userdata */
if (sc->sc_dryrun && sc->sc_userdata) {
if (agent_userdata(sc, sc->sc_userdata,
strlen(sc->sc_userdata)) != 0)
log_warnx("user-data failed");
}
if (sc->sc_stack != NULL) if (sc->sc_stack != NULL)
log_debug("%s: %s", __func__, sc->sc_stack); log_debug("%s: %s", __func__, sc->sc_stack);

33
agent/main.h
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2017, 2018, 2019 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2017 Reyk Floeter <reyk@openbsd.org>
* *
* Permission to use, copy, modify, and distribute this software for any * Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -29,30 +29,12 @@
#define DEFAULT_ENDPOINT "169.254.169.254" #define DEFAULT_ENDPOINT "169.254.169.254"
#define CONNECT_TIMEOUT 10 /* in seconds */ #define CONNECT_TIMEOUT 10 /* in seconds */
enum cloudname {
AZURE,
CLOUDINIT,
EC2,
OPENNEBULA,
OPENSTACK
};
#define CLOUDNAMES { \
"azure", "cloudinit", "ec2", "opennebula", "openstack", NULL \
}
enum strtype { enum strtype {
WORD, WORD,
LINE, LINE,
TEXT TEXT
}; };
enum state {
STATE_INIT,
STATE_DHCP,
STATE_169,
STATE_DONE
};
struct ssh_pubkey { struct ssh_pubkey {
char *ssh_keyval; char *ssh_keyval;
char *ssh_keyfp; char *ssh_keyfp;
@ -84,27 +66,16 @@ struct net_addr {
}; };
TAILQ_HEAD(net_addrs, net_addr); TAILQ_HEAD(net_addrs, net_addr);
struct system_config;
struct cloud {
enum cloudname cloud_name;
int (*fetch)(struct system_config *);
TAILQ_ENTRY(cloud) cloud_entry;
};
TAILQ_HEAD(clouds, cloud);
struct system_config { struct system_config {
const char *sc_stack; const char *sc_stack;
char *sc_args; char *sc_args;
char *sc_hostname; char *sc_hostname;
char *sc_username; char *sc_username;
char *sc_password_plain; char *sc_password;
char *sc_password_hash;
char *sc_pubkey; char *sc_pubkey;
char *sc_userdata; char *sc_userdata;
char *sc_endpoint; char *sc_endpoint;
enum state sc_state;
struct clouds *sc_clouds;
char *sc_instance; char *sc_instance;
int sc_timeout; int sc_timeout;

95
agent/opennebula.c
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018, 2019 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2018 Reyk Floeter <reyk@openbsd.org>
* *
* Permission to use, copy, modify, and distribute this software for any * Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -34,29 +34,25 @@ opennebula(struct system_config *sc)
FILE *fp; FILE *fp;
const char *delim = "\\\\\0", *errstr; const char *delim = "\\\\\0", *errstr;
char *line = NULL, *k, *v, *p, q; char *line = NULL, *k, *v, *p, q;
char *value = NULL, *next = NULL, *last; char *hname = NULL;
char *hname = NULL, *uname = NULL;
size_t len, lineno = 0, i; size_t len, lineno = 0, i;
int ret = -1; int ret = -1;
unsigned short unit; unsigned short unit;
if (sc->sc_state == STATE_INIT) {
sc->sc_state = STATE_169;
return (-1);
}
/* Return silently without error */ /* Return silently without error */
if ((fp = fopen("/mnt/context.sh", "r")) == NULL) if ((fp = fopen("/mnt/context.sh", "r")) == NULL)
goto done; goto done;
sc->sc_stack = "opennebula";
while ((line = fparseln(fp, &len, &lineno, while ((line = fparseln(fp, &len, &lineno,
delim, FPARSELN_UNESCALL)) != NULL) { delim, FPARSELN_UNESCALL)) != NULL) {
/* key */ /* key */
k = line + strspn(line, " \t\r"); k = line;
/* a context always starts with this header */ /* a context always starts with this header */
if (lineno == 1) { if (lineno == 1) {
ret = strcmp(k, ret = strcmp(line,
"# Context variables generated by OpenNebula"); "# Context variables generated by OpenNebula");
if (ret != 0) { if (ret != 0) {
log_debug("%s: unsupported context", __func__); log_debug("%s: unsupported context", __func__);
@ -65,12 +61,7 @@ opennebula(struct system_config *sc)
free(line); free(line);
continue; continue;
} }
line[strcspn(line, "#")] = '\0';
/* Strip comments that do not occur within a value */
if (*k == '#') {
free(line);
continue;
}
/* value */ /* value */
if ((v = strchr(line, '=')) == NULL || *(v + 1) == '\0') { if ((v = strchr(line, '=')) == NULL || *(v + 1) == '\0') {
@ -81,57 +72,20 @@ opennebula(struct system_config *sc)
/* value is quoted */ /* value is quoted */
q = *v; q = *v;
if (strspn(v, "\"'") == 0) { if (strspn(v, "\"'") == 0 || (p = strrchr(v, q)) == v) {
free(line); free(line);
continue; continue;
} }
*v++ = '\0'; *v++ = '\0';
*p = '\0';
/* quoted value can be continued on multiple lines */
if ((value = strdup("")) == NULL) {
log_debug("%s: strdup", __func__);
goto done;
}
next = v;
do {
if ((p = strrchr(next, q)) != NULL)
*p++ = '\0';
if (*next) {
last = value;
if (asprintf(&value, "%s%s\n",
last, next) == -1) {
log_debug("%s: asprintf", __func__);
if (next != v)
free(next);
goto done;
}
free(last);
}
if (next != v)
free(next);
} while (p == NULL &&
(next = fparseln(fp, &len, &lineno,
delim, FPARSELN_UNESCALL)) != NULL);
next = NULL;
v = value;
/* strip trailing newline */
if ((p = strrchr(v, '\n')) != NULL)
*p = '\0';
/* continue if value is empty */ /* continue if value is empty */
if (*v == '\0') { if (*v == '\0') {
free(line); free(line);
free(value);
value = NULL;
continue; continue;
} }
/* print key/value unless it is a multi-line value */ log_debug("%s: %s = %s", __func__, k, v);
if (strcasecmp("SSH_PUBLIC_KEY", k) != 0 &&
strcasecmp("START_SCRIPT", k) != 0 &&
strcasecmp("START_SCRIPT_BASE64", k) != 0)
log_debug("%s: %s = %s", __func__, k, v);
if (strcasecmp("NETWORK", k) == 0) { if (strcasecmp("NETWORK", k) == 0) {
if (strcasecmp("YES", v) == 0) if (strcasecmp("YES", v) == 0)
@ -224,35 +178,11 @@ opennebula(struct system_config *sc)
if ((hname = strdup(v)) == NULL) if ((hname = strdup(v)) == NULL)
log_warnx("failed to set hostname"); log_warnx("failed to set hostname");
} else if (strcasecmp("SSH_PUBLIC_KEY", k) == 0) { } else if (strcasecmp("SSH_PUBLIC_KEY", k) == 0) {
do { if (agent_addpubkey(sc, v, NULL) != 0)
p = v + strcspn(v, "\n"); log_warnx("failed to set ssh pubkey");
*p++ = '\0';
if (*v)
log_debug("%s: %s = %s",
__func__, k, v);
if (*v && agent_addpubkey(sc, v, NULL) != 0)
log_warnx("failed to set ssh pubkey");
v = p + strspn(p, "\n");
} while (*v != '\0');
} else if (strcasecmp("START_SCRIPT", k) == 0 ||
strcasecmp("START_SCRIPT_BASE64", k) == 0) {
log_debug("%s: %s = ...", __func__, k);
/* We will detect and decode base64 later */
if ((sc->sc_userdata = strdup(v)) == NULL)
log_warnx("failed to set userdata");
} else if (strcasecmp("USERNAME", k) == 0) {
if ((uname = strdup(v)) == NULL)
log_warnx("failed to set username");
else {
free(sc->sc_username);
sc->sc_username = uname;
}
} }
free(line); free(line);
free(value);
value = NULL;
} }
fclose(fp); fclose(fp);
@ -286,6 +216,5 @@ opennebula(struct system_config *sc)
if (fp != NULL) if (fp != NULL)
fclose(fp); fclose(fp);
free(line); free(line);
free(value);
return (ret); return (ret);
} }

16
agent/openstack.c
View file

@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018, 2019 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2018 Reyk Floeter <reyk@openbsd.org>
* *
* Permission to use, copy, modify, and distribute this software for any * Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above * purpose with or without fee is hereby granted, provided that the above
@ -34,11 +34,18 @@ static int openstack_fetch(struct system_config *);
int int
openstack(struct system_config *sc) openstack(struct system_config *sc)
{ {
if (sc->sc_state == STATE_INIT) { if ((dhcp_getendpoint(sc) == -1) &&
sc->sc_state = STATE_DHCP; (sc->sc_endpoint = strdup(DEFAULT_ENDPOINT)) == NULL) {
log_warnx("failed to set defaults");
return (-1); return (-1);
} }
return openstack_fetch(sc);
if (openstack_fetch(sc) != 0) {
free(sc->sc_endpoint);
return (cloudinit(sc));
}
return (0);
} }
static int static int
@ -56,6 +63,7 @@ openstack_fetch(struct system_config *sc)
if ((json = metadata(sc, if ((json = metadata(sc,
"/openstack/latest/meta_data.json", TEXT)) == NULL) "/openstack/latest/meta_data.json", TEXT)) == NULL)
goto fail; goto fail;
sc->sc_stack = "openstack";
if ((j = json_parse(json, strlen(json))) == NULL) if ((j = json_parse(json, strlen(json))) == NULL)
goto fail; goto fail;

150
cloud-agent.md
View file

@ -1,150 +0,0 @@
CLOUD-AGENT(8) - System Manager's Manual
# NAME
**cloud-agent** - cloud provisioning for OpenBSD VMs
# SYNOPSIS
**cloud-agent**
\[**-nuv**]
\[**-c**&nbsp;*cloud*\[,*cloud*...]]
\[**-p**&nbsp;*length*]
\[**-r**&nbsp;*rootdisk*]
\[**-t**&nbsp;*timeout*]
\[**-U**&nbsp;*username*]
*interface*
# DESCRIPTION
The
**cloud-agent**
program manages the OpenBSD provisioning and VM interaction in cloud
environments.
The options are as follows:
**-c** *cloud*\[,*cloud*...]
> Probe a list of cloud stacks for provisioning in the specified order.
> If this option is not specified,
> **cloud-agent**
> tries to detect the environment and possible cloud stacks automatically.
> Supported
> *cloud*
> stacks are:
> **azure**
> > Microsoft Azure
> **cloudinit**
> > Generic cloud-init
> **ec2**
> > Amazon AWS EC2
> **opennebula**
> > OpenNebula
> **openstack**
> > OpenStack
**-p** *length*
> Generate and set a random password for the default user.
> The password will be written in its plain form into the
> *~/.ssh/authorized\_keys*
> file.
> This allows to use the
> doas(1)
> command to gain root privileges.
> The minimum
> *length*
> is 8 characters and the default is an empty password.
**-n**
> Do not configure the system and skip the provisioning step.
**-t** *timeout*
> Change the HTTP timeout.
> The default is 3 seconds.
**-U** *username*
> Change the default user.
> The default is
> "ec2-user"
> on AWS,
> "azure-user"
> on Azure, and
> "puffy"
> everywhere else.
> The default user is used when it is not obtained from the cloud
> configuration.
> Using
> "root"
> is supported, but not recommended.
**-r** *rootdisk*
> Automatically grow the last
> OpenBSD
> FFS partition of the root disk to use all the available space.
**-u**
> Deprovision and unconfigure the system.
> This deletes keys, passwords, and logs files without asking for permission.
**-v**
> Produce more verbose output.
Enable
**cloud-agent**
in the
hostname.if(5)
of the VM's primary networking interface and automatically the last
partition of the root disk:
# cat /etc/hostname.hvn0
dhcp
!/usr/local/libexec/cloud-agent -r sd0 "\$if"
# FILES
*~/.ssh/authorized\_keys*
> The location of the agent-configured SSH public keys and optional password.
*/usr/local/libexec/cloud-agent*
> The agent itself.
*/usr/local/bin/cms*
> The CMS binary that is used to decrypt messages from the Azure fabric.
*/var/db/cloud-instance*
> The instance ID as reported by the cloud.
> **cloud-agent**
> reprovisions the system when the value has changed.
# SEE ALSO
meta-data(8),
vmd(8)
# AUTHORS
Reyk Floeter &lt;[reyk@openbsd.org](mailto:reyk@openbsd.org)&gt;
OpenBSD 6.5 - June 26, 2019