NATO - Did they promise Russia never to expand to the east?

The expansion of NATO itself is a violation of commitments made to Russia post-Cold War.
While publications from policy think-tanks like the Brookings Institution attempt to claim otherwise, it is clear that Russia was opposed to NATO’s continued eastward expansion post-Cold War, and was willing to cooperate with the US and Europe on a variety of issues as long as NATO didn’t do so [...]
While the US claims recent sanctions targeting Russia are based on alleged Russian interference in last year’s US elections, a careful examination of US policy post-Cold War reveals a systematic campaign aimed at undermining Moscow, encircling Russia and attempting to overturn the current, prevailing political order there in favor of one dominated by US interests.
At each step, various excuses are concocted, mainly to mesh with current political narratives embedded within public perception at any given time. Currently, playing left and right-leaning Americans against one another regarding the 2016 election and still-unproven allegations that Russia played a hand at tipping the election in President Donald Trump’s favor helps sell this most recent move made toward undermining Russia.
Under US President Barrack Obama, accusations that Russia instigated violence in Ukraine after a NATO-backed coup overthrew the elected government in Kiev served as justification for various rounds of sanctions targeting Moscow.