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v1.8.0 released.\r\n\r\nThis is mainly a bug fix release.\r\n\r\n## key bugs fixed\r\n\r\n#### streaming slaves consuming 100% CPU\r\n\r\nA bug has been fixed, at the **streaming** functionality. netdata was not handling all the error cases properly, resulting in 100% cpu utilization of a single core, at the slaves, under certain conditions. Especially under FreeBSD and macOS slaves, these conditions were always met, so using FreeBSD or macOS as netdata slaves, was completely broken.\r\n\r\nAlso, there have been many more improvements at the streaming functionality.\r\n\r\n#### missing alarm notifications on netdata masters\r\n\r\nA bug has been fixed, affecting **alarm notifications at netdata masters**. netdata was incorrectly messing cached alarm state data between the alarms of the mirrored hosts, resulting in alarm notifications not dispatched under certain conditions. This was affecting only netdata masters (ie. netdata servers with more than one host databases, with health monitoring enabled). The alarms were generated and were visible at the dashboards, but the notifications were not always sent.\r\n\r\nIt is now fixed.\r\n\r\n#### netdata API generating corrupted JSON\r\n\r\nAnother bug has been fixed, at the netdata API. netdata was assuming that the JSON representation of a chart would at most be 1024 bytes, and it was generating **corrupted JSON** output when any chart was exceeding that limit.\r\n\r\nRemoved the limitation (ie. now there is no limit).\r\n\r\n#### netdata crashing when starting on systems without writable disks\r\n\r\nThere was an issue that caused netdata to crash while starting, if **no usable disks were found**.\r\n\r\nFixed.\r\n\r\n#### python.d.plugin URLService did not support HTTP keep-alive\r\n\r\nnetdata now uses `urllib3` (shipped with netdata for both python v2 and v3) for URLService based plugins.\r\n\r\nThis enables HTTP `keep-alive` on all connections, which allows netdata to have permanent connections to third party web applications.\r\n\r\nFixed by @l2isbad \r\n\r\nThis can be considered an enhancement, but given that netdata collects metrics per second, the lack of HTTP `keep-alive` was forcing netdata to reconnect on every iteration, which (to my view), is a bug.\r\n\r\n#### streamed charts with duplicate names\r\n\r\nThere was an issue with charts that were created with name aliases. When these charts were streamed from netdata slaves to netdata masters, they ended up with duplicate chart names (ie instead of `type.name` they had `type.type.name`). Fixed it.\r\n\r\n## compatibility enhancements\r\n\r\n- better support for Oracle Linux, by @schindlerd \r\n- better support for Alpine Linux\r\n- various fixes at the build procedure for macOS\r\n- `fping` can now run as non-root, in static binary netdata packages\r\n\r\n## netdata generic enhancements\r\n\r\n- netdata can now listen on UNIX domain sockets (`.sock` files). This allows a local web server and netdata to communicate bypassing the network stack (for netdata set `bind to = unix:/path/to/netdata.sock` - this option supports multiple arguments, so netdata can listen to multiple unix sockets and tcp sockets, at the same time).\r\n\r\n- minor fixes at the installer, by @vincele\r\n\r\n- systemd `netdata.service` now allows setting negative netdata OOM score and restarts netdata if it crashes. The new `netdata.service` is not automatically installed when updating netdata. Either delete `/etc/systemd/system/netdata.service` and then update/re-install netdata, or copy the file by hand.\r\n\r\n## new plugins\r\n\r\n- Added Intel CPU temperature charts on FreeBSD and macOS, by @vlvkobal \r\n- Added CPU thermal throttling charts on Linux (useful on physical servers and possibly laptops)\r\n- Added `chrony` plugin, by @domschl\r\n- Added [Stiebel Eltron](https://github.com/firehol/netdata/blob/master/node.d/README.md#stiebel-eltron) plugin to collect metrics from heat pumps and hot water installations from Stiebel Eltron ISG.\r\n\r\n## improved plugins\r\n\r\n- `web_log` bugfixes, enhancements and optimizations (including `squid` logs), by @l2isbad \r\n- `web_log` now enables parsing HTTP/2 logs in `custom_log_format`, by @Funzinator\r\n- `redis` bugfixes, by @l2isbad \r\n- `haproxy` bugfixes, by @l2isbad \r\n- `elasticsearch` bugfixes and optimizations, by @l2isbad \r\n- `rabbitmq` bugfixes and optimizations, by @l2isbad \r\n- `mdstat` bugfixes, by @JeffHenson\r\n- `tomcat` improvements, by @Wing924\r\n- `mysql` improvements, by @alibo and @l2isbad \r\n- `dovecot` improvements\r\n- `postgres` improvements, by @facetoe\r\n- `cpufreq` fixed a bug that prevented `accurate` reporting of CPU frequencies. `accurate` works with the `acpi-cpufreq` driver and calculates the average CPU clock of the CPUs utilizing the accounting per frequency, as reported by the kernel, by @tycho\r\n- `cpuidle` performance improvements (faster under load) by @tycho \r\n- `fail2ban` bugfixes, by @l2isbad \r\n- `SNMP` plugin new uses latest `net-snmp` and the corrupted 64 bit counters encountered under certain node.js version is now fixed.\r\n\r\n## dashboard improvements\r\n\r\n- `easypiecharts` and `gauges` can now render arbitrary ranges and animate clock wise or counter clock wise.\r\n\r\n- **container network interfaces are now moved to the container section** and they are rendered from the container view point (i.e. `sent` = what the container sent) - no more `veth*` garbage on the dashboard.\r\n\r\n   The interfaces also appear as `eth0` (or whatever the container sees) and they are inside the container section of the dashboard. netdata maps each `veth*` interface to the right container, using plain `cgroups` features, so this works for all container managers (docker, lxc, etc).\r\n\r\n- containers and VMs now have summary gauges on the dashboard\r\n\r\n   ![image](https://user-images.githubusercontent.com/2662304/30249219-3e032246-9640-11e7-9f37-4d78f280a74d.png)\r\n\r\n- traditionally netdata was using 1024 bits = 1 kilobit. It is fixed: 1000 bits = 1 kilobit.\r\n\r\n- netdata charts should now work on wordpress pages.\r\n\r\n## alarms and notifications\r\n\r\n- `alarm-notify.sh` now supports debug mode, showing the exact commands it runs to send notifications, when `export NETDATA_ALARM_NOTIFY_DEBUG=1`\r\n\r\n- `alarm-notify.sh` now supports setting the sender email address of the emails it sends.\r\n\r\n- emails sent by `alarm-notify.sh` now include headers to reduce the possibility of them being scored as spam, by @Ferroin \r\n\r\n- network related alarms got new thresholds and improved badges\r\n\r\n- netdata now detects if the system has been suspended and pauses all alarms for 60 seconds on resume, to prevent false alarms (no more false alarms on laptops when they resume).\r\n\r\n- netdata alarms now support filtering based on hostname and O/S (linux, freebsd, macos). This means that netdata masters, can now support alarms for slaves of any O/S (i.e. a Linux netdata master can handle alarms for a FreeBSD slave).\r\n\r\n- netdata slack notifications now show the host sent the alarm. In the image below, the alarm is about `bangalore`, and is sent by `netdata-build-server` (at the lower left corner):\r\n\r\n   ![image](https://user-images.githubusercontent.com/2662304/30249624-55a62bf2-9648-11e7-8e85-730395a8e0bf.png)\r\n\r\n\r\n## statsd\r\n\r\n- the number of fractional points supported by statsd is now configurable (1 to 7).\r\n- 95th percentile calculation on statsd histograms and timers, was incorrectly averaging the values. It is now fixed.\r\n- statsd metrics with non ASCII text were processed by the statsd server, but were breaking JSON data generated by netdata. Fixed it by replacing all invalid characters.\r\n"}}
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