Commit Graph

330 Commits

Author SHA1 Message Date
Joe LeVeque
1ac146dd97
[caclmgrd] Inherit DaemonBase class from sonic-py-common package (#5373)
Eliminate duplicate logging code by inheriting from DaemonBase class in sonic-py-common package.
2020-09-15 13:34:41 -07:00
Joe LeVeque
3a901eeae0
[procdockerstatsd] Inherit DaemonBase class from sonic-py-common package (#5372)
Eliminate duplicate logging code by inheriting from DaemonBase class in sonic-py-common package.
2020-09-14 16:36:37 -07:00
noaOrMlnx
353003f6ee
Change update_feature_state call to pass False as default if feature has no 'has_timer' field (#5260)
* Pass False as default if feature has no timer field

* Update hostcfgd to fit the new changes merged

New changes can be found in PR:5248
2020-09-14 11:28:24 -07:00
Blueve
01fb32fa08
[conf] append nos-config-part for s6100 (#5234)
* [conf] append nos-config-part for s6100

* modify rc.local

Signed-off-by: Guohan Lu <lguohan@gmail.com>

* Update rc.local

Co-authored-by: Blueve <jika@microsoft.com>
Co-authored-by: Guohan Lu <lguohan@gmail.com>
Co-authored-by: Ying Xie <yxieca@users.noreply.github.com>
2020-09-08 12:29:02 -07:00
arheneus@marvell.com
f136fd0623
[ebtbles] Replace binary config file to text config file for ebtables (#5252)
Issue: Binary ebtables config file is CPU arch dependent
Fix: Load the text config during firsttime boot and
     Generate the binary persistent atomic file

Signed-off-by: Antony Rheneus <arheneus@marvell.com>
2020-09-03 17:27:07 -07:00
abdosi
dd908c2ee2
[sonic-swsscommon] submodule update with commit's (#5300)
[schema] Make schema header support C project (#373)
Removed DB specific get api's from Selectable class (#378)

With the change as part of #378 caclmgrd need to be updated
to use new client side Get API to access namespace.

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>
2020-09-02 18:09:03 -07:00
Joe LeVeque
07b9d7f44d
[pcie-check] Make pcie-check.sh executable (#5256)
The pcie-check.sh script was added in https://github.com/Azure/sonic-buildimage/pull/4771, but was not given executable permission. Therefore, we would see messages like:

```
Aug 26 22:54:05.536248 sonic ERR systemd[664]: pcie-check.service: Failed to execute command: Permission denied
Aug 26 22:54:05.536386 sonic ERR systemd[664]: pcie-check.service: Failed at step EXEC spawning /usr/bin/pcie-check.sh: Permission denied
Aug 26 22:54:05.536600 sonic WARNING systemd[1]: pcie-check.service: Failed with result 'exit-code'.
```
2020-08-29 10:29:42 -07:00
Tamer Ahmed
7d3ec60b1f
[hostcfgd] Fix Boolean String Evaluation (#5248)
New attribute 'has_timer' introduced to init_cfg.json does not evaluate
as Bool, rather it evaluates as string. This PR fixes this issue. Also,
this PR fixes an issue when there is system config unit (snmp, telemetry) that
has no installation config (WantedBy=, RequiredBy=, Also=, Alias=) settings
in the [Install] section. In the latter case, the .service should not be enabled.

signed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
2020-08-27 06:50:03 -07:00
Tamer Ahmed
90cbb4d78c
[hostcfgd] Handle Both Service And Timer Units (#5228)
Commit e484ae9dd introduced systemd .timer unit to hostcfgd.
However, when stopping service that has timer, there is possibility that
timer is not running and the service would not be stopped. This PR
address this situation by handling both .timer and .service units.

signed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
2020-08-21 09:51:41 -07:00
abdosi
74d8b4a6be
[caclmgrd] Add support for multi-ASIC platforms (#5022)
* Support for Control Plane ACL's for Multi-asic Platforms.
Following changes were done:
 1) Moved from using blocking listen() on Config DB to the select() model
 via python-swsscommon since we have to wait on event from multiple
 config db's
 2) Since  python-swsscommon is not available on host added libswsscommon and python-swsscommon
    and dependent packages in the base image (host enviroment)
 3) Made iptables programmed in all namespace using ip netns exec

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Address Review Comments

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Fix Review Comments

* Fix Comments

* Added Change for Multi-asic to have iptables
rules to accept internal docker tcp/udp traffic
needed for syslog and redis-tcp connection.

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Fix Review Comments

* Added more comments on logic.

* Fixed all warning/errors reported by http://pep8online.com/
other than line > 80 characters.

* Fix Comment
Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Verified with swsscommon package. Fix issue for single asic platforms.

* Moved to new python package

* Address Review Comments.

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Address Review Comments.
2020-08-20 15:11:42 -07:00
Tamer Ahmed
e484ae9dda
[services] Fix Delay Start of SNMP And Telemetry (#5211)
SNMP and Telemetry services are not critical to switch startup.
They also cause fast-reboot not to meet timing requirements.
In order to delay start those service are associated with systemd
timer units, however when hostcfgd initiate service start, it start
the service and not the timer. This PR fixes this issue by
starting the timer associated with systemd unit.

signed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
2020-08-19 19:27:59 -07:00
Tamer Ahmed
dfc0617283
[interfaces] Reduce Calls to SONiC Cfggen (#5174)
Calls to sonic-cfggen is CPU expensive. This PR reduces calls to
sonic-cfggen to one call during startup when running interfaces-
config.

singed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
2020-08-17 15:46:52 -07:00
lguohan
082c26a27d
[build]: combine feature and container feature table (#5081)
1. remove container feature table
2. do not generate feature entry if the feature is not included
   in the image
3. rename ENABLE_* to INCLUDE_* for better clarity
4. rename feature status to feature state
5. [submodule]: update sonic-utilities

* 9700e45 2020-08-03 | [show/config]: combine feature and container feature cli (#1015) (HEAD, origin/master, origin/HEAD) [lguohan]
* c9d3550 2020-08-03 | [tests]: fix drops_group_test failure on second run (#1023) [lguohan]
* dfaae69 2020-08-03 | [lldpshow]: Fix input device is not a TTY error (#1016) [Arun Saravanan Balachandran]
* 216688e 2020-08-02 | [tests]: rename sonic-utilitie-tests to tests (#1022) [lguohan]

Signed-off-by: Guohan Lu <lguohan@gmail.com>
2020-08-05 13:23:12 -07:00
Renuka Manavalan
312771dc3e
[monit] Periodically monitor route consistency (#5085)
* Add route_check to mont.

* Switched to units of cycles per comments

* Added comments per Joe's comments.

* Added more comments per Royal's comments.
2020-08-04 10:33:13 -07:00
Joe LeVeque
3b89e5d467
[Python] Migrate applications/scripts to import sonic-py-common package (#5043)
As part of consolidating all common Python-based functionality into the new sonic-py-common package, this pull request:
1. Redirects all Python applications/scripts in sonic-buildimage repo which previously imported sonic_device_util or sonic_daemon_base to instead import sonic-py-common, which was added in https://github.com/Azure/sonic-buildimage/pull/5003
2. Replaces all calls to `sonic_device_util.get_platform_info()` to instead call `sonic_py_common.get_platform()` and removes any calls to `sonic_device_util.get_machine_info()` which are no longer necessary (i.e., those which were only used to pass the results to `sonic_device_util.get_platform_info()`.
3. Removes unused imports to the now-deprecated sonic-daemon-base package and sonic_device_util.py module

This is the next step toward resolving https://github.com/Azure/sonic-buildimage/issues/4999

Also reverted my previous change in which device_info.get_platform() would first try obtaining the platform ID string from Config DB and fall back to gathering it from machine.conf upon failure because this function is called by sonic-cfggen before the data is in the DB, in which case, the db_connect() call will hang indefinitely, which was not the behavior I expected. As of now, the function will always reference machine.conf.
2020-08-03 11:43:12 -07:00
Tamer Ahmed
7872b4e196
[platform] Add Support For Environment Variable File (#5010)
* [platform] Add Support For Environment Variable

This PR adds the ability to read environment file from /etc/sonic.
the file contains immutable SONiC config attributes such as platform,
hwsku, version, device_type. The aim is to minimize calls being made
into sonic-cfggen during boot time.

singed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
2020-07-31 17:59:09 -07:00
Joe LeVeque
b2344f6f78
[caclmgrd] Always restart service upon process termination (#5065) 2020-07-29 10:12:38 -07:00
rkdevi27
26050ffef8
[baseimage]: /host unmount timeout issue during reboot. (#5032)
Fix for the host unmount issue through PR https://github.com/Azure/sonic-buildimage/pull/4558 and https://github.com/Azure/sonic-buildimage/pull/4865 creates the timeout of syslog.socket closure during reboot since the journald socket closure has been included in syslog.socket

Removed the journal socket closure. The host unmount is fixed with just stopping the services which gets restarted only after /var/log unmount and not causing the unmount issues.
2020-07-25 01:27:58 -07:00
Joe LeVeque
1587889b7a
[caclmgrd] remove default DROP rule on FORWARD chain (#5034) 2020-07-24 11:59:46 -07:00
Joe LeVeque
43b5832e0c
[sudoers] Add sonic-installer list to read-only commands (#4996)
`sonic-installer list` is a read-only command. Specify it as such in the sudoers file.

This will also ensure the new `show boot` command, which calls `sudo sonic-installer list` under the hood doesn't fail due to permissions.
2020-07-20 11:23:05 -07:00
Joe LeVeque
d6925499f1
[caclmgrd] Filter DHCP packets based on dest port only (#4995) 2020-07-17 11:16:19 -07:00
madhanmellanox
ade634090d
[caclmgrd] Log error message if IPv4 ACL table contains IPv6 rule and vice-versa (#4498)
* Defect 2082949: Handling Control Plane ACLs so that IPv4 rules and IPv6 rules are not added to the same ACL table

* Previous code review comments of coming up with functions for is_ipv4_rule and is_ipv6_rule is addressed and also raising Exceptions instead of simply aborting when the conflict occurs is handled

* Addressed code review comment to replace duplicate code with already existing functions

* removed raising Exception when rule conflict in Control plane ACLs are found

* added code to remove the rule_props if it is conflicting ACL table versioning rule

* addressed review comment to add ignoring rule in the error statement

Co-authored-by: Madhan Babu <madhan@arc-build-server.mtr.labs.mlnx>
2020-07-15 20:24:44 +03:00
rkdevi27
df740b3653
[baseimage]: /host unmount failed in VM during reboot (#4865)
Added a check further to make the services to stop appropriately before unmount.

Fix #4651
2020-07-14 15:34:19 -07:00
Sujin Kang
bf45e11d27
Add pcie-check service to check PCIe devices at boot (#4771)
* PCIe Monitor service

* Add rescan to pcie-mon.service when it fails to get all pcie devices

* space

* Clean up

* review comments

* update the pcie status in state db

* update the failed pcie status once at the end

* Update the pcie_status in STATE_DB and rename the service

* Add log to exit the service if the configuration file doesn't exist.

* fix the build failure

* Redo the pcie rescan for pcie-check failed case.

* review comments

* review comments

* review comments
2020-07-13 14:15:09 -07:00
Sujin Kang
b4452edb8a Add disabling HW watchdog during boot for fast-reboot and warm-reboot (#4927)
* Add disabling HW watchdog during boot for fast-reboot and warm-reboot case

* typo
2020-07-12 18:08:52 +00:00
Joe LeVeque
2731571dc9 [caclmgrd] Improve code reuse (#4931)
Improve code reuse in `generate_block_ip2me_traffic_iptables_commands()` function.
2020-07-12 18:08:52 +00:00
Venkatesan Mahalingam
7d003c3518 [TACACS+]: Add support to specify source address for TACACS+ (#4610)
This pull request was cherry picked from "#1238" to resolve the conflicts.

- Why I did it
Add support to specify source address for TACACS+
- How I did it
Add patches for libpam-tacplus and libnss-tacplus. The patches parse the new option 'src_ip' and store the converted addrinfo. Then the addrinfo is used for TACACS+ connection.
Add a attribute 'src_ip' for table "TACPLUS|global" in configDB
Add some code to adapt to the attribute 'src_ip'.
- How to verify it
Config command for source address PR in sonic-utilities
config tacacs src_ip <ip_address>

- Description for the changelog
Add patches to specify source address for the TACACS+ outgoing packets.

- A picture of a cute animal (not mandatory but encouraged)

**UT logs: **

UT_tacacs_source_intf.txt
2020-07-12 18:08:51 +00:00
abdosi
fc6bcff52b [sonic-buildimage] Changes to make network specific sysctl common for both host and docker namespace (#4838)
* [sonic-buildimage] Changes to make network specific sysctl
common for both host and docker namespace (in multi-npu).

This change is triggered with issue found in multi-npu platforms
where in docker namespace
net.ipv6.conf.all.forwarding was 0 (should be 1) because of
which RS/RA message were triggered and link-local router were learnt.

Beside this there were some other sysctl.net.ipv6* params whose value
in docker namespace is not same as host namespace.

So to make we are always in sync in host and docker namespace
created common file that list all sysctl.net.* params and used
both by host and docker namespace. Any change will get applied
to both namespace.

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Address Review Comments and made sure to invoke augtool
only one and do string concatenation of all set commands

* Address Review Comments.
2020-07-12 18:08:51 +00:00
arlakshm
a8b99f77f3 syslog changes Multi ASIC platforms (#4738)
Add changes for syslog support for containers running in namespaces on multi ASIC platforms.
On Multi ASIC platforms

Rsyslog service is only running on the host. There is no rsyslog service running in each namespace.
On multi ASIC platforms the rsyslog service on the host will be listening on the docker0 ip address instead of loopback address.
The rsyslog.conf on the containers is modified to have omfwd target ip to be docker0 ipaddress instead of loopback ip

Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan <arlakshm@microsoft.com>
2020-07-12 18:08:51 +00:00
Joe LeVeque
4d2d95e8e6
[hostcfgd] Synchronize all feature statuses once upon start (#4714)
- Ensure all features (services) are in the configured state when hostcfgd starts
- Better functionalization of code
- Also replace calls to deprecated `has_key()` method in `tacacs_server_handler()` and `tacacs_global_handler()` with `in` keyword.

This PR depends on https://github.com/Azure/sonic-utilities/pull/944, otherwise `config load_minigraph` will fail when trying to restart disabled services.
2020-06-20 12:09:29 -07:00
padmanarayana
95e3cda5da
[DELL]: FTOS to SONiC fast conversion fixes (#4807)
While migrating to SONiC 20181130, identified a couple of issues:
1. union-mount needs /host/machine.conf parameters for vendor specific checks : however, in case of migration, the /host/machine.conf is extracted from ONIE only in https://github.com/Azure/sonic-buildimage/blob/master/files/image_config/platform/rc.local#L127. 
2. Since grub.cfg is updated to have net.ifnames=0 biosdevname=0, 70-persistent-net.rules changes are no longer required.
2020-06-19 11:02:08 -07:00
Joe LeVeque
6960477cc2
[caclmgrd] Don't limit connection tracking to TCP (#4796)
Don't limit iptables connection tracking to TCP protocol; allow connection tracking for all protocols. This allows services like NTP, which is UDP-based, to receive replies from an NTP server even if the port is blocked, as long as it is in reply to a request sent from the device itself.
2020-06-18 00:18:20 -07:00
xumia
76a395cdbf
[secure boot] Support rw files allowlist (#4585)
* Support rw files allowlist for Sonic Secure Boot
* Improve the performance
* fix bug
* Move the config description into a md file
* Change to use a simple way to remove the blank line
* Support chmod a-x in rw folder
* Change function name
* Change some unnecessary words
2020-06-13 00:10:13 -07:00
Ying Xie
ae7bf3db52
[ntp] disable ntp long jump (#4748)
Found another syncd timing issue related to clock going backwards.
To be safe disable the ntp long jump.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>
2020-06-11 13:01:21 -07:00
Joe LeVeque
7b8037770d
[caclmgrd] Get first VLAN host IP address via next() (#4685)
I found that with IPv4Network types, calling list(ip_ntwrk.hosts()) is reliable. However, when doing the same with an IPv6Network, I found that the conversion to a list can hang indefinitely. This appears to me to be a bug in the ipaddress.IPv6Network implementation. However, I could not find any other reports on the web.

This patch changes the behavior to call next() on the ip_ntwrk.hosts() generator instead, which returns the IP address of the first host.
2020-06-02 02:11:21 -07:00
Joe LeVeque
eff8a89523
[hostcfgd] Get service enable/disable feature working (#4676)
Fix hostcfgd so that changes to the "FEATURE" table in ConfigDB are properly handled. Three changes here:

1. Fix indenting such that the handling of each key actually occurs in the for key in status_data.keys(): loop
2. Add calls to sudo systemctl mask and sudo systemctl unmask as appropriate to ensure changes persist across reboots
3. Substitute returns with continues so that even if one service fails, we still try to handle the others

Note that the masking is persistent, even if the configuration is not saved. We may want to consider only calling systemctl enable/disable in hostcfgd when the DB table changes, and only call systemctl mask/unmask upon calling config save.
2020-06-02 02:07:22 -07:00
taocy
ea2dd9541d change image apt source list from stretch to buster for arm 2020-05-25 13:15:19 +00:00
Joe LeVeque
bce42a7595
[caclmgrd] Allow more ICMP types (#4625) 2020-05-20 17:45:07 -07:00
abdosi
a44fc07e78
Changes to support config-setup service for multi-npu (#4609)
* Changes to support config-setup service for multi-npu
platforms. For Multi-npu we are not supporting as of
now config initializtion and ZTP. It will support creating
config db from minigraph or using  config db from previous
file system

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

* Address Review Comments.

* Address Review comments

* Address Review Comments of using pyhton based config load_minigraph/
config save/config reload from shell scripts so that we don't duplicate
code. Also while running from shell we will skip stop/start services
done by those commands.

* Updated to use python command so no code duplication.
2020-05-20 16:32:33 -07:00
rkdevi27
32f58b5864
Fix "/host unmount failure" during reboot (#4558) 2020-05-20 11:18:11 -07:00
Ying Xie
cdfb1ced44
[ntp] enable/disable NTP long jump according to reboot type (#4577)
* [ntp] enable/disable NTP long jump according to reboot type

- Enable NTP long jump after cold reboot.
- Disable NTP long jump after warrm/fast reboot.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>

* fix typo

* further refactoring

* use sonic-db-cli instead
2020-05-20 10:57:21 -07:00
Joe LeVeque
5150e7b655
[caclmgrd] Ignore keys in interface-related tables if no IP prefix is present (#4581)
Since the introduction of VRF, interface-related tables in ConfigDB will have multiple entries, one of which only contains the interface name and no IP prefix. Thus, when iterating over the keys in the tables, we need to ignore the entries which do not contain IP prefixes.
2020-05-12 18:16:55 -07:00
abdosi
5fe2216ea3
Fix for issue where image is compile with flag ENABLE_DHCP_GRAPH_SERVICE (#4573)
and then we load image and reboot even if there was existing
config_db.json we will look for DHCP Service. we should disbale
update_graph in such cases. This behaviour is silimar to what we have in
201811 image.
2020-05-12 14:49:56 -07:00
Joe LeVeque
5e8e0d76fc
[caclmgrd] Add some default ACCEPT rules and lastly drop all incoming packets (#4412)
Modified caclmgrd behavior to enhance control plane security as follows:

Upon starting or receiving notification of ACL table/rule changes in Config DB:
1. Add iptables/ip6tables commands to allow all incoming packets from established TCP sessions or new TCP sessions which are related to established TCP sessions
2. Add iptables/ip6tables commands to allow bidirectional ICMPv4 ping and traceroute
3. Add iptables/ip6tables commands to allow bidirectional ICMPv6 ping and traceroute
4. Add iptables/ip6tables commands to allow all incoming Neighbor Discovery Protocol (NDP) NS/NA/RS/RA messages
5. Add iptables/ip6tables commands to allow all incoming IPv4 DHCP packets
6. Add iptables/ip6tables commands to allow all incoming IPv6 DHCP packets
7. Add iptables/ip6tables commands to allow all incoming BGP traffic
8. Add iptables/ip6tables commands for all ACL rules for recognized services (currently SSH, SNMP, NTP)
9. For all services which we did not find configured ACL rules, add iptables/ip6tables commands to allow all incoming packets for those services (allows the device to accept SSH connections before the device is configured)
10. Add iptables rules to drop all packets destined for loopback interface IP addresses
11. Add iptables rules to drop all packets destined for management interface IP addresses
12. Add iptables rules to drop all packets destined for point-to-point interface IP addresses
13. Add iptables rules to drop all packets destined for our VLAN interface gateway IP addresses
14. Add iptables/ip6tables commands to allow all incoming packets with TTL of 0 or 1 (This allows the device to respond to tools like tcptraceroute)
15. If we found control plane ACLs in the configuration and applied them, we lastly add iptables/ip6tables commands to drop all other incoming packets
2020-05-11 12:36:47 -07:00
Joe LeVeque
dfdd94d8ad
[process-reboot-cause] If software reboot cause is unknown add note if first boot into new image (#4538) 2020-05-06 22:48:33 -07:00
wangshengjun
bed4a799df
[ebtables]add the filter rule for ARP packets with vlan tag: (#3945)
1. ebtables -t filter -A FORWARD -p 802_1Q --vlan-encap 0806 -j DROP
The ARP packet with vlan tag can't match the default rule.

Signed-off-by: wangshengjun <wangshengjun@asterfusion.com>
2020-05-06 20:03:09 -07:00
Dong Zhang
340cf826a6
[MultiDB] use sonic-db-cli PING and fix wrong multiDB API in NAT (#4541) 2020-05-06 15:41:28 -07:00
rkdevi27
4511216789
Ssd mitigation changes (#4214)
* ssd_mitigation_changes

* ssd_mitigation_changes

* ssd_mitigation_changes

* ssd_mitigation_changes
2020-04-30 22:58:09 -07:00
Olivier Singla
799f22d4c7
[baseimage]: Run fsck filesystem check support prior mounting filesystem (#4431)
* Run fsck filesystem check support prior mounting filesystem

If the filesystem become non clean ("dirty"), SONiC does not run fsck to
repair and mark it as clean again.

This patch adds the functionality to run fsck on each boot, prior to the
filesystem being mounted. This allows the filesystem to be repaired if
needed.

Note that if the filesystem is maked as clean, fsck does nothing and simply
return so this is perfectly fine to call fsck every time prior to mount the
filesystem.

How to verify this patch (using bash):

Using an image without this patch:

Make the filesystem "dirty" (not clean)
[we are making the assumption that filesystem is stored in /dev/sda3 - Please adjust depending of the platform]
[do this only on a test platform!]

dd if=/dev/sda3 of=superblock bs=1 count=2048
printf "$(printf '\\x%02X' 2)" | dd of="superblock" bs=1 seek=1082 count=1 conv=notrunc &> /dev/null
dd of=/dev/sda3 if=superblock bs=1 count=2048

Verify that filesystem is not clean
tune2fs -l /dev/sda3 | grep "Filesystem state:"

reboot and verify that the filesystem is still not clean
Redo the same test with an image with this patch, and verify that at next reboot the filesystem is repaired and becomes clean.

fsck log is stored on syslog, using the string FSCK as markup.
2020-04-30 00:33:20 -07:00
pavel-shirshov
057ced0391
[bgpcfgd]: Split one bgp mega-template to chunks. (#4143)
The one big bgp configuration template was splitted into chunks.

Currently we have three types of bgp neighbor peers:

general bgp peers. They are represented by CONFIG_DB::BGP_NEIGHBOR table entries
dynamic bgp peers. They are represented by CONFIG_DB::BGP_PEER_RANGE table entries
monitors bgp peers. They are represented by CONFIG_DB::BGP_MONITORS table entries
This PR introduces three templates for each peer type:

bgp policies: represent policieas that will be applied to the bgp peer-group (ip prefix-lists, route-maps, etc)
bgp peer-group: represent bgp peer group which has common configuration for the bgp peer type and uses bgp routing policy from the previous item
bgp peer-group instance: represent bgp configuration, which will be used to instatiate a bgp peer-group for the bgp peer-type. Usually this one is simple, consist of the referral to the bgp peer-group, bgp peer description and bgp peer ip address.
This PR redefined constant.yml file. Now this file has a setting for to use or don't use bgp_neighbor metadata. This file has more parameters for now, which are not used. They will be used in the next iteration of bgpcfgd.

Currently all tests have been disabled. I'm going to create next PR with the tests right after this PR is merged.

I'm going to introduce better bgpcfgd in a short time. It will include support of dynamic changes for the templates.

FIX:: #4231
2020-04-23 09:42:22 -07:00
bsun-sudo
012c832ce5 [ntp] add ntp support in buster with mgmt vrf (#55)
- create a file in files/image_config/ntp/ntp-systemd-wrapper to add mgmt vrf related start cmd for ntp service. So that the default /usr/lib/ntp/ntp-systemd-wrapper can be overriden during build time.

- modify build_debian.sh to cp files/image_config/ntp/ntp-systemd-wrapper to /usr/lib/ntp/ntp-systemd-wrapper during build time.

Co-authored-by: Bing Sun <Bing_Sun@dell.com>
2020-04-17 04:51:51 +00:00
bsun-sudo
2a237c57e6 [mgmt-vrf]: mgmt vrf related change for Buster (#53)
Co-authored-by: Bing Sun <Bing_Sun@dell.com>
2020-04-17 04:51:51 +00:00
Stephen Sun
aec51c8aaf [docker-wait-any] Use APIClient instead of Client according to API update
due to the upgrade from docker-py (1.6.0) to docker (4.1.0)
2020-04-17 04:51:51 +00:00
Guohan Lu
e479a56db3 [baseimage]: setup ebtables.service in buster image
ebtables is not enabled by default in buster

Signed-off-by: Guohan Lu <lguohan@gmail.com>
2020-04-17 04:51:51 +00:00
Guohan Lu
fb12b0a621 [baseimage]: various fixes due to buster changes
do mount/umount in the chroot environment
install cron explicitly
install rasdaemon as a replacement for mcelog
switch python package docker-py to docker
2020-04-17 04:51:51 +00:00
Renuka Manavalan
f128153706
[baseimage]: Install Kubernetes packages if enabled in image (#4374)
* Install kubernetes worker node packages, if enabled.

* Minor updates

* Added some comments

* Updates per review comments.
Built a private image to test to work fine.

* Remove the removed file.

* Update per comments
Make a fix, as kubeadm no demands a higher version of kubelet & kubectl.
As kubeadm auto install kubectl & kubelet, removing explicit install is an easier/robust fix.

* Changes per review comments.

* Updates per comments.
1) Dropped helper & pod scripts
2) Made install verbose

* Drop creation of pods subdir, as this PR does not use them.

* From comments to 'n' per review comments.

* 1) kubeadm.conf is created as part of kubeadm package install. Hence dropped explicit copy.
2020-04-13 08:41:18 -07:00
rajendra-dendukuri
de377ebccd
Fix typo in config-setup service (#4388) 2020-04-07 23:44:50 -07:00
SuvarnaMeenakshi
4b8067e913
Multi-ASIC implementation (#3888)
Changes made to support multi-asic platform. Added multi-instance support for swss, syncd, database, bgp, teamd and lldp.
2020-03-31 10:06:19 -07:00
Garrick He
d095d0bdbc
[procdockerstatsd] Fix CMD field in dB (#4335)
* Fix the CMD for the PROCESSSTATS entries so that
  there is a space between the command name and the
  arguments.

Signed-off-by: Garrick He <garrick_he@dell.com>
2020-03-28 11:43:48 -07:00
lguohan
3c6f23e7b7
[tacacs]: fix /etc/nsswitch.conf for buster image (#4303)
in buster image, default /etc/nsswitch.conf becomes

```
passwd:         files
```

when tacacs is enable, this files changes to

```
passwd:         tacplus files
```
2020-03-22 09:44:48 -07:00
SuvarnaMeenakshi
cfe754f665
[ntp]: Add "tinker panic 0" in ntp.conf to avoid ntpd from panic (#4263)
- What I did
Add configuration to avoid ntpd from panic and exit if the drift between new time and current system time is large.

- How I did it
Added "tinker panic 0" in ntp.conf file.

- How to verify it
[this assumes that there is a valid NTP server IP in config_db/ntp.conf]

Change the current system time to a bad time with a large drift from time in ntp server; drift should be greater than 1000s.
Reboot the device.
Before the fix:
3. upon reboot, ntp-config service comes up fine, ntp service goes to active(exited) state without any error message. This is because the offset between new time (from ntp server) and the current system time is very large, ntpd goes to panic mode and exits. The system continues to show the bad time.

After the fix:
3. Upon reboot, ntp-config comes up fine, ntp services comes up from and stays in active (running) state. The system clock gets synced with the ntp server time.
2020-03-21 18:50:12 -07:00
arheneus@marvell.com
94162679bb
[sonic-cfggen] MGMT Interface configuration (#4280)
update network and broadcast address in /etc/network/interfaces

Before:
root@sonic:/home/admin# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.28.32.73  netmask 255.255.254.0  broadcast 0.0.0.0 <<<<<

After:
root@sonic:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.28.32.73  netmask 255.255.254.0  broadcast 10.28.33.255 <<<<<

Signed-off-by: Antony Rheneus <arheneus@marvell.com>
2020-03-21 14:25:19 -07:00
yozhao101
560fd50262
[Monit] Delay start of monitoring for 5 minutes (#4281) 2020-03-19 14:14:47 -07:00
Stepan Blyshchak
1ef740361c
[docker_image_ctl.j2] Share UTS namespace with host OS (#4169)
Instead of updating hostname manualy on Config DB hostname change,
simply share containers UTS namespace with host OS.
Ideally, instead of setting `--uts=host` for every container in SONiC,
this setting can be set per container if feature requires.
One behaviour change is introduced in this commit, when `--privileged`
or `--cap-add=CAP_SYS_ADMIN` and `--uts=host` are combined, container
has privilege to change host OS and every other container hostname.
Such privilege should be fixed by limiting containers capabilities.

Signed-off-by: Stepan Blyschak <stepanb@mellanox.com>
2020-02-26 10:56:54 +02:00
Santhosh Kumar T
2626565afb
[DellEMC] S6100 Last Reboot Reason Thermal Support (#3767) 2020-02-18 00:02:33 -08:00
Joe LeVeque
8126916b46
[interfaces-config.sh] Do not bring 'lo' interface down and up (#4150) 2020-02-14 14:55:03 -08:00
Stephen Sun
af44856d5c
[process-reboot-cause]Clean up the process-reboot-cause as reqired in issue 3927 (#4128) 2020-02-11 09:54:12 -08:00
pra-moh
ab1a945cb9
[procdockerstatsd] Fix incorrect case issue in service file (#4134) 2020-02-10 11:08:42 -08:00
pra-moh
4338fbe12b
[procdockerstats]: Update file permission for procdockerstatsd (#4126) 2020-02-07 07:46:29 -08:00
Kiran Kumar Kella
97165a0d69
Changes in sonic-buildimage to support the NAT feature (#3494)
* Changes in sonic-buildimage for the NAT feature
- Docker for NAT
- installing the required tools iptables and conntrack for nat

Signed-off-by: kiran.kella@broadcom.com

* Add redis-tools dependencies in the docker nat compilation

* Addressed review comments

* add natsyncd to warm-boot finalizer list

* addressed review comments

* using swsscommon.DBConnector instead of swsssdk.SonicV2Connector

* Enable NAT application in docker-sonic-vs
2020-01-29 17:40:43 -08:00
kannankvs
7cb63008d7
mvrf_avoid_snmp_yml_config: made changes to pass SNMP config from con… (#4057)
* mvrf_avoid_snmp_yml_config: made changes to pass SNMP config from confiDB to snmpd.conf without using snmp.yml
* added a missing if condition
2020-01-28 17:41:21 -08:00
SuvarnaMeenakshi
c9483796dc [baseimage]: support building multi-asic component (#3856)
- move single instance services into their own folder
- generate Systemd templates for any multi-instance service files in slave.mk
- detect single or multi-instance platform in systemd-sonic-generator based on asic.conf platform specific file.
- update container hostname after creation instead of during creation (docker_image_ctl)
- run Docker containers in a network namespace if specified
- add a service to create a simulated multi-ASIC topology on the virtual switch platform

Signed-off-by: Lawrence Lee <t-lale@microsoft.com>
Signed-off-by: Suvarna Meenakshi <Suvarna.Meenaksh@microsoft.com>
2020-01-26 13:56:42 -08:00
pra-moh
e3475b81d7 [baseimage]: removing space from shebang in procdockerstatsd (#4051) 2020-01-23 17:49:41 -08:00
Dong Zhang
7aa0baf709 [MultiDB] (except ./src and ./dockers dirs): replace redis-cli with sonic-db-cli and use new DBConnector (#4035)
* [MultiDB] (except ./src and ./dockers dirs): replace redis-cli with sonic-db-cli and use new DBConnector
* update comment for a potential bug
* update comment
* add TODO maker as review reqirement
2020-01-22 11:26:23 -08:00
Howard Persh
44fa5efe00 [startup] Fixes issue with /var/platform directory not created (#4000) 2020-01-22 10:02:28 -08:00
Joe LeVeque
aca1a86856 [caclmgrd] Fix application of IPv6 service ACL rules (part 2) (#4036) 2020-01-17 17:33:31 -08:00
kannankvs
d150721fa1 modified down rules to pre-down rules to ensure that default route is… (#3853)
* modified down rules to pre-down rules to ensure that default route is deleted just before interface is made down
2020-01-16 19:36:49 -08:00
yozhao101
aa67921d06 [Monit] Change the monitoring period from 120 seconds to 60 seconds. (#3974)
* [Monit] Change the monitoring period of monit from 120 seconds to 60
seconds and also at the same time double the interval for existing sonic monit config file in
host.

Signed-off-by: Yong Zhao <yozhao@microsoft.com>
2020-01-10 13:01:24 -08:00
Sujin Kang
856b4b64eb [reboot cause]: Delay process-reboot-cause service until network connection is stable (#4003) 2020-01-10 09:47:13 -08:00
lguohan
483a5946a8
Revert "[MultiDB]except src and dockers : replace redis-cli with sonic-db-cli and use new DBConnector (#3928)" (#4002)
This reverts commit 0dae59ac30.
2020-01-10 08:27:34 -08:00
Dong Zhang
0dae59ac30 [MultiDB]except src and dockers : replace redis-cli with sonic-db-cli and use new DBConnector (#3928)
* [MultiDB]except src and dockers : replace redis-cli with sonic-db-cli and use new DBConnector
* fix vs tests along with swss vs tests together
2020-01-02 14:46:25 -08:00
Joe LeVeque
24a0c46464
[monit] Build from source and patch to use MemAvailable value if available on system (#3875) 2019-12-30 18:25:57 -08:00
Renuka Manavalan
78db0804d3
corefile uploader: Updates per review comments offline (#3915)
* Updates per review comments
1) core_uploader service waits for syslog.service
2) core_uploader service enabled for restart on failure
3) Use mtime instead of file size + ample time to be robust.

* Avoid reloading already uploaded file, by marking the names with a prefix.

* Updated failing path.
1) If rc file is missing or required data missing, it periodically logs error in forever loop.
2) If upload fails, retry every hour with a error log, forever.

* Fix few bugs

* The binary update_json.py will come from sonic-utilities.
2019-12-30 13:01:03 -08:00
Prabhu Sreenivasan
87f70108cb SONiC Management Framework Release 1.0 (#3488)
* Added sonic-mgmt-framework as submodule / docker

* fix build issues

* update sonic-mgmt-framework submodule branch to master

* Merged changes 70007e6d2ba3a4c0b371cd693ccc63e0a8906e77..00d4fcfed6a759e40d7b92120ea0ee1f08300fc6

00d4fcfed6a759e40d7b92120ea0ee1f08300fc6 Modified environemnt variables

* Changes to build sonic-mgmt-framework docker

* bumped up sonic-mgmt-framework commit-id

* version bump for sonic-mgmt-framework commit-it

* bumped up sonic-mgmt-framework commit-id

* Add python packages to docker

* Build fix for docker with python packages

* added libyang as dependent package

* Allow building images on NFS-mounted clones

Prior to this change, `build_debian.sh` would generate a Debian
filesystem in `./fsroot`. This needs root permissions, and one of the
tests that is performed is whether the user can create a character
special file in the filesystem (using mknod).

On most NFS deployments, `root` is the least privileged user, and cannot
run mknod. Also, attempting to run commands like rm or mv as root would
fail due to permission errors, since the root user gets mapped to an
unprivileged user like `nobody`.

This commit changes the location of the Debian filesystem to `/fsroot`,
which is a tmpfs mount within the slave Docker. The default squashfs,
docker tarball and zip files are also created within /tmp, before being
copied back to /sonic as the regular user.

The side effect of this change is that the contents of `/fsroot` are no
longer available once the slave container exits, however they are
available within the squashfs image.

Signed-off-by: Nirenjan Krishnan <Nirenjan.Krishnan@dell.com>

* bumped up sonc-mgmt-framework commit to include PR #18

*     REST Server startup script is enahnced to read the settings from
    ConfigDB. Below table provides mapping of db field to command line
    argument name.

    ============================================================
    ConfigDB entry key      Field name      REST Server argument
    ============================================================
    REST_SERVER|default     port            -port
    REST_SERVER|default     client_auth     -client_auth
    REST_SERVER|default     log_level       -v
    DEVICE_METADATA|x509    server_crt      -cert
    DEVICE_METADATA|x509    server_key      -key
    DEVICE_METADATA|x509    ca_crt          -cacert
    ============================================================

* Replace src/telemetry as submodule to sonic-telemetry

* Update telemetry commit HEAD

* Update sonic-telemetry commit HEAD

* libyang env path update

* Add libyang dependency to telemetry

* Add scripts to create JSON files for CLI backend

Scripts to create /var/platform/syseeprom and /var/platform/system, which are back-end
files for CLI, for system EEPROM and system information.

Signed-off-by: Howard Persh <Howard_Persh@dell.com>

* In startup script, create directory where CLI back-end files live

Signed-off-by: Howard Persh <Howard_Persh@dell.com>

* build dependency pkgs added to docker for build failure fix

* Changes to fix build issue for mgmt framework

* Fix exec path issue with telemetry

* s5232[device] PSU detecttion and default led state support

* Processing of first boot in rc.local should not have premature exit

Signed-off-by: Howard Persh <Howard_Persh@dell.com>

*  docker mount options added for platform, system features

* bumped up sonic-mgmt-framework commit id to pick 23rd July 2019 changes

* Added mount options for telemetry docker to get access for system and platform info.

* Update commit for sonic-utilities

* [dell]: Corrected dport map and renamed config files for S5232F

* Fix telemetry submodule commit

* added support for sonic-cli console

* [Dell S5232F, Z9264F] Harden FPGA driver kernel module

For Dell S5232F and Z9264F platforms, be more strict when checking state
in ISR of FPGA driver, to harden against spurious interrupts.

Signed-off-by: Howard Persh <Howard_Persh@dell.com>

* update mgmt-framework submodule to 27th Aug commit.

* remove changes not related to mgmt-framework and sonic-telemetry

* Revert "Replace src/telemetry as submodule to sonic-telemetry"

This reverts commit 11c3192975.

* Revert "Replace src/telemetry as submodule to sonic-telemetry"

This reverts commit 11c3192975.

* make submodule changes and remove a change not related to PR

* more changes

* Update .gitmodules

* Update Dockerfile.j2

* Update .gitmodules

* Update .gitmodules

* Update .gitmodules

reverting experimental change

* Removed syspoll for release_1.0

Signed-off-by: Jeff Yin <29264773+jeff-yin@users.noreply.github.com>

* Update docker-sonic-mgmt-framework.mk

* Update sonic-mgmt-framework.mk

* Update sonic-mgmt-framework.mk

* Update docker-sonic-mgmt-framework.mk

* Update docker-sonic-mgmt-framework.mk

* Revert "Processing of first boot in rc.local should not have premature exit"

This reverts commit e99a91ffc2.

* Remove old telemetry directory

* Update docker-sonic-mgmt-framework.mk

* Resolving merge conflict with Azure

* Reverting the wrong merge

* Use CVL_SCHEMA_PATH instead of changing directory for telemetry startup

* Add missing export

* Add python mmh3 to slave dockerfile

* Remove sonic-mgmt-framework build dep for telemetry, fix dialout startup issues

* Provided flag to disable compiling mgmt-framework

* Update sonic-utilites point latest commit id

* Point sonic-utilities to Azure accepted SHA

* Updating mgmt framework to right sha

* Add sonic-telemetry submodule

* Update the mgmt-framework commit id

Co-authored-by: jghalam <joe.ghalam@gmail.com>
Co-authored-by: Partha Dutta <51353699+dutta-partha@users.noreply.github.com>
Co-authored-by: srideepDell <srideep_devireddy@dell.com>
Co-authored-by: nirenjan <nirenjan@users.noreply.github.com>
Co-authored-by: Sachin Holla <51310506+sachinholla@users.noreply.github.com>
Co-authored-by: Eric Seifert <seiferteric@gmail.com>
Co-authored-by: Howard Persh <hpersh@yahoo.com>
Co-authored-by: Jeff Yin <29264773+jeff-yin@users.noreply.github.com>
Co-authored-by: Arunsundar Kannan <31632515+arunsundark@users.noreply.github.com>
Co-authored-by: rvasanthm <51932293+rvasanthm@users.noreply.github.com>
Co-authored-by: Ashok Daparthi-Dell <Ashok_Daparthi@Dell.com>
Co-authored-by: anand-kumar-subramanian <51383315+anand-kumar-subramanian@users.noreply.github.com>
2019-12-23 21:47:16 -08:00
Joe LeVeque
77d636256b
[caclmgrd] Fix application of IPv6 service ACL rules (#3917) 2019-12-19 07:15:27 -08:00
Renuka Manavalan
3ab4b71656
Corefile uploader service (#3887)
* Corefile uploader service

1) A service is added to watch /var/core and upload to Azure storage
2) The service is disabled on boot. One may enable explicitly.
3) The .rc file to be updated with acct credentials and http proxy to use.
4) If service is enabled with no credentials, it would sleep, with periodic log messages
5) For any update in .rc, the service has to be restarted to take effect.

* Remove rw permission for .rc file for group & others.

* Changes per review comments.
Re-ordered .rc file per JSON.dump order.
Added a script to enable partial update of .rc, which HWProxy would use to add acct key.

* Azure storage upload requires python module futures, hence added it to install list.

* Removed trailing spaces.

* A mistake in name corrected.
Copy the .rc updater script to /usr/bin.
2019-12-15 16:48:48 -08:00
Stephen Sun
80bb7fd15a [process-reboot-cause]Address the issue: Incorrect reboot cause returned when warm reboot follows a hardware caused reboot (#3880)
* [process-reboot-cause]Address the issue: Incorrect reboot cause returned when warm reboot follows a hardware caused reboot
1. check whether /proc/cmdline indicates warm/fast reboot.
   if yes the software reboot cause file will be treated as the reboot cause.
   finish
2. check whether platform api returns a reboot cause.
   if yes it is treated as the reboot cause.
   finish.
3. check whether /hosts/reboot-cause contains a cause.
   if yes it is treated as the cause otherwise return unknown.

* [process-reboot-cause]Fix review comments

* [process-reboot-cause]address comments
1. use "with" statement
2. update fast/warm reboot BOOT_ARG

* [process-reboot-cause]address comments

* refactor the code flow

* Remove escape

* Remove extra ':'
2019-12-14 09:41:48 -08:00
Ying Xie
eefa8455d7
[hostcfgd] avoid in place editing config file contents (#3904)
In place editing (sed -i) seems having some issues with filesystem
interaction. It could leave 0 size file or corrupted file behind.

It would be safer to sed the file contents into a new file and switch
new file with the old file.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>
2019-12-13 19:26:39 -08:00
rajendra-dendukuri
fec80293dd ZTP infrastructure changes to support DHCP discovery provisioning data (#3298)
* ZTP infrastructure changes to support DHCP discovery provisioning data

- Dynamically generate DHCP client configuration based on current ZTP state
- Added support to request and process hostname when using DHCPv6
- Do not process graphservice url dhcp option if ZTP is enabled, ZTP service
will process it
- Generate /e/n/i file with all active interfaces seeking address assignment
via DHCP. Only interfaces that are created in Linux will be added to /e/n/i.
Also DHCP is started only on linked up in-band interfaces.

Signed-off-by: Rajendra Dendukuri <rajendra.dendukuri@broadcom.com>
2019-12-10 08:16:56 -08:00
rajendra-dendukuri
cda61290ac [config-setup]: create a SONiC configuration management service (#3227)
* Create a SONiC configuration management service
* Perform config db migration after loading config_db.json to redis DB
* Migrate config-setup post migration hooks on image upgrade

config-setup post migration hooks help user to migrate configurations from
old image to new image. If the installed hooks are user defined they will not
be part of the newly installed image. So these hooks have to be migrated to
new image and only then they can be executing when the new image is booting.

The changes in this fix migrate config-setup post-migration hooks and ensure
that any hooks with the same filename in newly installed image are not
overwritten.

It is expected that users install new hooks as per their requirement and
not edit existing hooks. Any changes to existing hooks need to be done as
part of new image and not post bootup.
2019-12-04 07:15:58 -08:00
pra-moh
bfa96bbce3 Add daemon which periodically pushes process and docker stats to State DB (#3525) 2019-11-27 15:35:41 -08:00
pra-moh
d3a1555f30 [hostcfgd] Add support to enable/disable optional features (#3653) 2019-11-26 14:11:12 -08:00
kannankvs
4007d9ba9c [ntp]: modified ntp script to hide the error related to cfggen (#3745)
This PR is to handle the issue 3527.
When device boots up, NTP throws a traceback as explained in the issue 3527.

- Traceback will be seen when MGMT_VRF_CONFIG does not exist in the database. Traceback is coming from the script “/etc/init.d/ntp”.

- Traceback does not affect the NTP functionality with/without management VRF. When MGMT_VRF_CONFIG does not exist or when MGMT_VRF_CONFIG’s mgmtVrfEnabled is configured to “false”, “NTP” will be started in the “default VRF” context, which is working fine even with this traceback.

- This traceback error will be hidden by redirecting the error to /dev/null without affecting functionality.
2019-11-14 00:06:54 -08:00
Joe LeVeque
c50c390eb4 [rsyslog] Add support for IPv6 remote addresses (#3754) 2019-11-14 00:00:55 -08:00
Tyler Li
c07ae3b16f Loopback ip addresses move to intfmgrd for supporting VRF 2019-11-10 02:27:33 -08:00
Joe LeVeque
85b0de3df1 [docker-syncd]: Restart SwSS, syncd and dependent services if a critical process in syncd container exits unexpectedly (#3534)
Add the same mechanism I developed for the SwSS service in #2845 to the syncd service. However, in order to cause the SwSS service to also exit and restart in this situation, I developed a docker-wait-any program which the SwSS service uses to wait for either the swss or syncd containers to exit.
2019-11-09 10:26:39 -08:00
lguohan
6d46badbdc
[aboot]: preserve snmp.yml and acl.json for eos to sonic fast reboot (#3716) 2019-11-06 20:18:31 -08:00
Neetha John
95466c3ab7 [pfcwd]: Do not start pfc watchdog on Management Tor (#3719)
Signed-off-by: Neetha John <nejo@microsoft.com>
2019-11-06 18:51:02 -08:00
pavel-shirshov
d5af096f41
[TSA]: Add community to the loopback prefix, when isolated (#3708)
* Rename asn/deployment_id_asn_map.yaml to constants/constants.yaml

* Fix bgp templates

* Add community for loopback when bgpd is isolated

* Use correct community value
2019-11-06 16:07:28 -08:00
Ying Xie
5961e031e1
[hostname-config] improve hostname-config process (#3676)
We noticed in tests/production that there is a low probability failure
where /etc/hosts could have some garbage characters before the entry for
local host name. The consequence is that all sudo command would be very
slow. In extreme cases it would prevent some services from starting
properly.

I suspect that the /etc/hosts file might be opened by some process causing
the issue. Editing contents with new file level and replace the whole file
should be safer.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>
2019-10-29 08:30:27 -07:00